1 

# 50cc EXTRA 300 ARF-QB (Quick Build)


# ASSEMBLY MANUAL

AEROWORKS 4903 Nome Street, Denver, CO. 80239 - Phone 303-371-4222 - Fax 303-371-4320 E-mail - info@aero-works.net2 

## TABLE OF CONTENTS

Page

Aeroworks Contact Information ......................................................................... 3

Introduction ....................................... ............................................................ 4

Kit Contents................................................................................................... 5
Items Needed To Complete ................................................................................. 8
Tightening and Re-shrinking th e Covering ........................................................... 9

UltracoteTM Colors ......................................................................................... 10
Check Seams and Overlaps for Good Seal ............................................................. 11
Checking Hinges For Proper Throw ..................................................................... 12

Wing Assembly................................................................................................ 13
Stab and Elevator Assembly............................................................................... 18
Rudder and Pull-Pull Cable Assembly .................................................................. 22

Tail Wheel Installation ...................................................................................... 29
Main Landing Gear, Gear Cuffs, and Wheel Pants Assembly ...................................... 33
Engine Installation ........................................................................................... 38

Canister Installation.......................................................................................... 42
Tuned Pipe Installation.................. ..................................................................... 46

Throttle/Choke Servo Installation........................................................................ 50
Ignition Installation ...... .................................................................................... 55
Fuel Tank Assembly and Installation..................................................................... 58

Radio Installation ........................ ..................................................................... 65

Cowl Installation ............................................................................................. 68
Preflight Preparation ........................................................................................ 73

Decal installation .............................................................................................. 76
Center of Gravity (C.G.) / Control Throws .............................................................. 80

Control Throw Deflection Table ........................................................................... 833 4903 Nome Street Denver, CO 80239 Phone: (303) 371-4222

Fax: (303) 371-4320 Website: www.aero-works.net E-mail: Info@aero-works.net



## Thank you for choosing the Aeroworks 50cc EXTRA 300 ARF-QB. We put great effort into making this plane the best model you will ever build and fly. We have provided you with the highest quality kit and performance possible. We wish you great success in the assembly and flying of your new Aeroworks 50cc EXTRA 300 ARF-QB.



# !WARNING!

An R/C aircraft is not a t oy! If misused, it can cause se rious bodily harm and property damage. Fly only in open areas, and AMA (A cademy of Model Aeronautics) approved flying sites. Follow all manufacturer instru ctions included with your plane, radio, servo’s, batteries and engine.

Aeroworks manufacturing warranties this kit to be free from defects in both material and workmanship at the date of purchase. This warranty do es not cover any component parts damaged by use or modification. In no case shall Aeroworks liability exceed the original cost of the purchased kit. Further, Aeroworks rese rves the right to change or modify this warranty without notice.

In that Aeroworks has no control over the fina l assembly or materials used for final assembly, No liability shall be assumed nor accepted for an y damage resulting from the use by the user of the final user-assembled product. By the act of using the userassembled product, the user ac cepts all resulting liability.

We, as the kit manufacturer, have provided you with a top quality, thoroughly tested kit

and instructions, but ultimately the quality a nd fly ability of your finished model depends on how you build it; therefore, we cannot in any way guarantee the performance of your completed model, and no representations are expre sses or implied as to the performance or safety of your completed model.4 

## INTRODUCTION

Your new 50cc EXTRA 300 ARF-QB is a highly aeroba tic airplane. It is capable of both precision and 3-D maneuvers. The aircraft builds easily, quickly, and preci sely due to its state of the art CAD design, LASER cut technology, and high quality included hardware. We hope you enjoy building and flying your 50cc EXTRA 300 ARF-QB.

Great care has been taken in both the de sign and manufacturing of the 50cc EXTRA 300 ARF-QB to allow for the strongest and lightes t construction possible. Only the highest quality materials from the covering, paint, wood and hardware have been used in the construction of this model.
The 50cc EXTRA 300 ARF-QB has been individually hand built, covered and painted by trained and experienced craftsmen with over 25 years of manufacturing experience. Using CAD design, laser cut technology and jig-built as sures accuracy in al l stages of production.
The 50cc EXTRA 300 ARF-QB is designed for gas engines in the 50cc ca tegory. The Desert Aircraft 50cc engine is shown in the assemb ly instructions. The aircraft was tested with the Desert Aircraft 50cc and has outstanding performance. The fi nal choice of engine is left up to the builder. A computer radio is recommended to allow th e pilot to take advantage of the full capabilities of this aerobatic aircraft.

IMPORTANT Please read through this manual car efully, before starting the assembly of your new 50cc EXTRA 300 ARF-QB . Inventory a nd inspect all parts and hardware for any imperfections or damage. Notify 

## Aeroworks immediately if there are missing or damaged parts. 

## INTENDED USE

This plane should not be regarded as a toy. This is an aerobatic plane and is recommended for pilots who are beyond the trainer-stage and are comfor table with flying an aerobatic sport plane.



## !READ! WARRANTY !READ!
It is important to notify Aero works of any damage or proble ms with the model within 30 days of receiving your airplane to be covered under warranty. All returned parts must be shipped in their original shipping boxes and insu red for full replacement value. If you wish toreturn this aircraft for any reason a 15% restock fee will be charged to the customer. In addition the customer is responsible for all return shipping cost and all pr ior shipping cost will not be refunded. Parts will be fi xed or replaced once the origin al item is returned at the owner’s expense. It is the decision of Aerowork s if the item is to be replaced or repaired.

Aeroworks cannot insure the skill of the modele r and can not influence the builder during the construction or use of this aircraft, and ther efore, will not be accountable for any property damage, bodily injury or d eath caused by this aircraft. Aeroworks cannot insure the skill of the modeler and can not influence the builder during the construction or use of this aircraft, and therefore,



## The purchaser/operator accepts all responsibility of any and all structural or mechanical failures

.5 

## KIT CONTENTS

50cc Extra 300 ARF-QB Materials List

Basic Aircraft Parts

Fuselage with pre-installed vertical fin – covered, fire wall fuel-proofed, pre-drilled three holes for the tail wheel assembly: (4) 8-32 blind nuts installed for main landing gear (18) 4-40 blind nuts installed for the mounting of the stab(4),Cowling(2) and Belly Pan of fuse(12). (1) Engine box top hatch cover with AW logo in stalled by (4) T2.6x8mm PWA screws (1) Engine box bottom hatch cover with AW logo installed by (4) T2.6x8mm PWA screws (1) Bottom Long Pipe Hatch installed by (6) 4- 40x14mm hex style bolts and (6) #6 bonded washers (1) Bottom Canister Hatch installed by (6) 4- 40x14mm hex style bolts and (6) #6 bonded washers (1)Hatch cover for the landing gear installed by (2) T2.6x16mm PWA screwsCanopy base—painted, with (4) 4-40 blind nuts installed (1) Tinted Canopy—glued on the canopy base and painted, installed on the fuselage by (4) 4-40x16mm hex style bolts(4) #6 bonded washers for the mounting of the canopy (4) 3mm split lock washers for the mounting of the
canopy (1) 3.5(o.d.) x850mm Antenna tube installed (2) 3.5(o.d.) x70mm pull-pull exit tube installed (2) Elevator servo string installed

Left Wing with Aileron – covered: Pre-drilled for the mounting of the control horns (2)8-32 blind nuts installed for the wing mounting. (2)located pins installed pre-drilled hole for cotter6 pin (6) pin point hinges glued (1) Aileron servo string installed

Right Wing with Aileron – covered: Pre-drilled for the mounting of the control horns (2) 8-32 blind nuts installed for the wing mounting. (2)located pins glued pre-drilled hole for cotter pin (6) pin point hinges installed (1) Aileron servo string installed

Horizontal Stabilizer with elevator assembly with (8) pin point hinges (glued)---covered Elevators Pre-drilled fo r the mounting of the control horns Rudder with (5) pin point hinges (not glued) – covered Rudder Pre-drilled for the mounting of the con- trol horns



### SUB ASSEMBLIES:

#1: (1) Fiberglass Cowling w/ inside ring glued—painted with (2) screws holes at bottom and (2) 6-32 blind nuts installed at top (2) 4-40x16mm hex style bolts for mounting cowling (2) #6 bonded washers for mounting cowling (2) 3mm split lock washers for mounting cowling. (2) 6-32x16mm hex head bolts for mounting cowling (2) #6 bonded washers for mounting cowling

#2: (1) 4mm 7075Aluminum Main Landing Gear -- painted (2) 5x40mm Axle Bolts (2) M8 lock nuts (4) 5mm i.d. Wheel Collars with set-screws (2) 95mm Dia. Main Wheels (Lite Type) (4) 4-40x14mm hex style bolts for mounting wheel pants (4) 3mm flat washer for mounting wheel pants (4) 3mm split ring lock washer for mounting wheel pants(4) 8-32x20mm hex head bolts for mounting main landing gear (4) 4mm flat washers for mounting main landing gear (4) 4mm split ring lock washers for mounting main landing gear.

#3: (2)Wheel Pants—1 Left and 1 Right---Painted (4) 4-40 blind nuts installed on the wheel pants, 2 per side.

#4: (2) Gear Cuffs – 1 Left and 1 Right - Painted (4) 4-40x7mm hex style head bolts for cuffs mounting (4) #6 bonded washers for cuffs mounting #5: (1) AW Aluminum Tail Wheel Assembly – Medium

#6: (1) 32mm o.d. Aluminum Tube for wing joint— Anodized Black (2) 12.5mm o.d. Aluminum Tube for stab joint – one front and one rear, Anodized Black (4) 8-32x25mm Hex head bots for wing mounting

(4) #8 bonded washer for wing mounting (4) 4mm split ring lock washers for wing mounting (4) 4-40x16mm Hex style head bolts for stab mounting

(4) #6 bonded washer for stab mounting (4) 3mm split ring lock washers for stab mounting (4) 1.8mm cotter pins

#7: (2) 4-40 3” Left hand and Right hand threaded pushrods with nuts for ailerons(2) 4-40 2-1/2” Left hand and Right hand threaded pushrods with nuts for elevators (1) Wrench for the left hand and right threaded pushrod

(2) 4-40x300mm Threaded pushrods (2) 4-40 solder coupler with nuts (2) 4-40 Metal clevises (6) brass spacers – 2 for ailerons; 2 for elevators; 1 for throttle; 1 for choke (10) 4-40 Ball Link – 4 for ailerons; 4 for elevators; 1 for throttle; 1 for choke (10) 4-40x16mm hex style bolts (10) 4-40 lock nuts (10) 3mm flat washers

#8: (2) 1x1100mm plastic coated pull-pull steel cable. (4) 4-40 Metal R/C links with metal clevises and nuts (4) 3.5x5mm brass pull-pull swaging tubes (6) AW double control horns (24) T2.6x16mm Phillips head mounting screws (12) T2.6x12mm Phillips head mounting screws (4) 4-40 Ball Links for rudder servo (4) 4-40x16mm hex style head bolts (4) 4-40 Lock nuts (2) Brass Spacers (4) 3 flat washers

#9:

(1)750cc Gas Fuel Tank Assembly –Gas (1) 450cc Gas Fuel Tank Assembly-Smoke

(1) 4ft. large gas fuel line (4) Brass Barbs for fuel line (2) Fuel filler Dot – 1 male and 1 female

#10:

(2)Throttle servo mounting trays (1) Canister mounting bracket with Silicon Tubes (1) Long Pipe mounting bracket with Silicon Tubes (3) Engine Mount Temp (DA50, 3W50 & Universal) (2) 8x8x300mm Sponge for the receiver and battery7 (2) 6x70x160mm Foam for the Fuel Tanks (6) 8x450mm Nylon Ties for the fuel tank mounting (10) 3x150mm Small Nylon Ties for the fuel line (4) 356x12.5mm Velcro (1) Card Stock (8”x11”) for making the template for cutting of cowling (1) Pre-cut (hot air exit) Template for cutting out the bottom of the cowl (1) Paper Degree Meter for the Rudder ( 1) 12mm Aluminum Insert (6) Rubber Grommets – each for 6mm, 8mm 10mm – Fuel line and wire guide

#11: (24) 6.35mm Aluminum Engine Stand offs.

#12: (1) 300x300mm White Covering (1) 300x300mm Cub Yellow Covering (1) 300x300mm Pearl Blue Covering OR (1) 300x300mm White Covering (1) 300x300 True Red Covering (1) 300x300 Black Covering

(1) 20x1800mm transparent covering

#13: (1) Custom throw meter

#14: (1) Manual CD

#15: (1) Vinyl Decal Set8 

## Hardware : 

## ITEMS NEEDED TO COMPLETE

• 50cc Gas engine and ignition



### • Standard or Pitts style muffler (Pitts Recommended)



### • Engine mount, mounting bolts, lock nuts, and flat washers.



### • 3.5” Spinner and propeller of choice



### • 2 x aileron servos (min 180 in./oz. Torque @ 6 volt, Digital, Metal Geared)



### • 1 x rudder servo (min 180 in./oz. Torque @ 6 volt, Digital, Metal Geared)



### • 2 x elevator servos (min 180 in./oz. Torque @ 6 volt, Digital, Metal Geared)



### • 1 x throttle servo (Fast / Reliable)



### • 1 x choke servo (Fast / Reliable) optional



### • Servo extensions 4 x 6,” 1 x 12”, 2 x 24”



### • 1 x 6 channel receiver (PCM recommended)



### • 1 x receiver battery (min 6.0 volt / 1700ma)



### • 1 x ignition battery (m in 4.8 volt / 1700ma)



### • 2 x switches with charge jacks



## Tools : • Allen wrenches US and Metric.



### • Dremel cutting disc and sanding drum tool



### • Electric drill and selection of bits



### • Razor saw



### • Flat head screwdriver



### • Hobby heat gun



### • Hobby iron and covering sock



### • Masking tape



### • Modeling knife



### • Needle nose pliers or crimping tool



### • Paper towels



### • Pen, pencil or felt tipped marker



### • Phillips screwdriver



### • Rubbing alcohol



### • Ruler and tape measure



### • Scissors



### • T pins



### • Waxed paper



### • Wire Cutters



## Adhesives :

• 15-30 Minute epoxy



### • Blue Loctite



### • Epoxy mixing cups, mixing sticks, brushes



### • CA kicker (optional)



### • Thick, Thin and Medium CA



### • Rubbing alcohol



### • Wipes


## WARNING Some rubbing alcohols may attack painted parts.91. Open your kit slowly and take care not to damage any parts of the kit. Remove all parts from their plastic protective covers for inspection. Before doing any assembly or installation of anydecals it is very important to re-shrink or retighten the already applie d covering. Due to the shipping process, heat and humidity changesfrom different climates, the covering may become lose and wrinkle in the sun. If you take thetime to re-tighten the covering, you will be rewarded with a long lasting beautifully covered model. 

## TIGHTENING AND RE-SHRINKING THE COVERING

2. Using your covering iron with a soft sock, gently apply pressure and rub in the covering. If any bubbles occur, your iron may be to hot. Reduce heat and work slowly. 3. If bubbles persist, use a small pin to punch holes in the bubble to relieve trapped air and reheat.

4. Use your heat gun with extreme caution. Take care not to apply too much heat to one area for long periods of time. This may cause the trimcolors to over shrink and pull away leaving unsightly gaps on the color lines. The trim stripes are especially vulnerable to over shrinking.10 1. Your model is covered w ith UltracoteTM covering. In case of repairs, the colors are:
Yellow/Silver/Blue Scheme Pearl Blue #845 Silver #881 Cub Yellow #884 White #870 

# UltracoteTM Colors

2. Red/White/Black Scheme Black #866 Silver #881 True Red #866 White #87011 1. Go over all seams and color overlaps with your sealing iron.

Note: Even if your models covering has no wrinkles out of the box it is still very important to go over all seams and overlaps to make certain they are sealed securely. This is especially important at theleading edges of the wings and stabs. We recommend checking the covering after each flying session. 

## CHECKING SEAMS AND COLOR OVERLAPS FOR GOOD SEAL

2. Use your covering iron to ensure all edges, seams, and color overlaps are securely sealed. 3. 

### This is an optional step but is recommended

. 

### Cut strips of clear covering to fit the hinge gaps. Use covering iron to seal the clear covering snugly into the bottom of the hinge lines as shown for air tight hinge seals.

Note: Remove clear pro- tective backing from film.



## IMPORTANT : It is the responsibility of the purchaser / operator to check the covering seams and overlaps for security and a good seal.

Aeroworks is not responsible for failure of covering seams or overlaps during flight.

Note: If covering continues to lift apply a small amount of thin CA underneath the covering. Then using a clean rag apply pressure to secure.



### One of the most important tools in your flight box is a roll of clear tape. This can be used at the field for fa st and easy repairs of the covering. Then once you have finished flying the covering can be permanently repaired.12 

## CHECKING HINGES FOR PROPER THROW

2. Evenly heat each hinge along the entire length of the wing. This will allow the hinge glue to soften and the hinge to move into it proper position. Hold the surface at full deflection until thehinges have cooled down and the glue has rehardened. 3. 

### If the elevator hinges are tight follow the same process as described for the wings.

Note: Once these steps have been completed the hinges will throw to their full deflect- tion. IMPORTANT

1. If control surfaces will not throw to full deflection it may be necessary using a heat gun to apply heat to the knuckle of each hinge. This will allow the hinges to move freely.13 

## Aileron Servo Installation

1. The ailerons have been pre-hinged and glued to the wing panels and are ready for flight. No other steps are necessary for hinging.

Gather (1) wing panel, (1) aileron servo, (4) servo mounting screws, (1) 1 1/4” servo arm , (1) safety clip and (1) 6” servo extension as shown below for preparation of the servo installation. 

## WING ASSEMBLY

2. Layout the servo on the wing to test fit the installation and ensure servo lead is the correct length.

Note: 180 in. oz. digital, metal geared servos are recommended. Servo selection can be the difference between a great flying model and a model that will crash. Always use brand name high quality servos. 3. Attach the 6” extension to the servo lead and secure with Aeroworks Safety Clip. Ensure the connectors will not come apart from vibration or light tension.

4. Fasten the pull string from the servo hole to the male plug of the servo extension. 

### Safety Clips

Available from Aeroworks14 5. Draw the servo extension through the wing and pull through the wing root rib.

Note: Taping servo lead to the inside of the wing panel will help to prevent lead from dropping back inside of wing panel during transportation

6. Install servo in servo well with the output arm toward the leading edge of the wing. Mark and drill location of servo mounting holes. 7. Install servo with servo mounting screws.



## Pushrod / Control Horn Installation

1. Gather the aileron control linkage parts as shownbelow. (1) 3” pushrod, (2) 4-40 ball link assemblies, (1) brass spacer, (1) flat washer, (1) left and (1) right side control horn, and (6) wood screws for each wing panel.

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e152. Assemble the pushrod and control horn assembly as shown. The ball link goes between the left and right sides of the control horn sides and is secured with a nylon lock nut. Start with the center hole in the control horn. The ball linkmay be moved up or down for more or less control throw. Brass spacer goes between servo arm and ball link

3. Correct installation of ball link to servo arm shown below.

Note: Flat washer will prevent ball link from coming loose from brass ball. 4. Place the control horns over the predrilled mounting holes.

5. Use a drop of thick CA glue on each screw to prevent screws from loosening due to vibration as shown. Pushrods have both left and right hand threads. This allows for easier fine adjustments during final setup. Be sure to thread ball link correctly onto pushrod. Ball links are self taping and can be used on either ends of the pushrod. Once ball link hasbeen threaded only rethread it onto the same direction threads.16 6. Securely fasten the control horn to the aileron with six wood screws.

7. Plug servo and battery into the receiver and turn radio on. Ensure the servo trim and sub trim is centered. Adjust the length of the pushrod so that the servo arm is parallel to the aileron hinge line and the trailing edge of the aileron is even with the trailing edge of the wing in the neutral position.

Note: Control horns have been set at a slight offset to provide full power at full deflection. 9. Use the opposite end of the adjustment wrench to tighten the pushrod jam nuts against the ball links. This will prevent the pushrod from turning in flight. 8. Use the supplied adjustme nt wrench to adjust the pushrod as shown below.17 10. Ensure the servo does not bind at either endpoint at full deflection. A 1” servo arm is recommended for best results. A 1 1/4” servo arm is required for full deflection of the aileron bevel.

11. Repeat all the above steps for the other wing.18 

## Elevator Servo Installation
1. The elevators have been pre-hinged and glued to the stabs and are ready for flight. No other steps are necessary for hinging. Clear covering has been provided for sealing of the hinge gaps if desired.



### Gather the stab/elevator assembly, (2) elevator servos, and (2) 24” servo extension.

Note: 24” servo extension will be used to connect servos to receiver during a later step. 

## STAB AND ELEVATOR ASSEMBLY

2. Install servo in servo well with the output shaft toward the leading edge of the stab. Fish the servo lead through the stab and out of the stab root rib. 3. Mark locations of servo mounting holes. Use a 1/16 bit to drill servo mounting holes. 4. Install servo with servo mounting screws.

1. Gather the elevator control linkage parts as shown below. There are:



### • (2) 4-40 pushrods 2 1/2”



### • (4) 4-40 ball link assemblies



### • (2) Flat washers



### • (2) brass spacer



### • (2) left side control horns



### • (2) right side control horns



### • (1) Adjustment wrench



### • (12) wood screws 

## Elevator Control Linkage Installation192. Assemble the pushrod and control horn assembly as shown. The ball link goes between the left and right sides of the control horn sides and is secured with a nylon lock nut. Start with the center hole in the control horn. The ball linkmay be moved up or down for more or less control throw. Brass spacer goes between servo arm and ball link

3. Correct installation of ball link to servo arm shown below.

Note: Flat washer will prevent ball link from coming loose from brass ball. Pushrods have both left and right hand threads. This allows for easier fine adjustments during final setup. Be sure to thread ball li nk correctly onto pushrod. Ball links are self taping and can be used on either ends of the pushrod. Once ball link has been threaded only rethread it onto the same direction threads.

4-40 BOLT FLAT WASHER

LOCK NUT BRASS SPACER 4. Place the control horns over the predrilled mounting holes.

Note: Control horns have been set at a slight offset to allow for maximum torque at full deflection

5. Use a drop of thick CA glue on each screw to prevent screws from loosening due to vibration as shown.

Note: CA glues have a fast drying time. Remember to work quickly.20 6. Mount the control horn using six wood screws.

7. Plug servo and battery into the receiver and turn radio on. Ensure the servo trim and sub trim is centered. Adjust the length of the pushrod so that the servo arm is parallel to the elevatorhinge line and the counter balance of the elevator is even with the lead ing edge of the stab in the neutral position. 8. Use the supplied adjustme nt wrench to adjust the pushrod as shown below.

9. Use the opposite end of the adjustment wrench to tighten the pushrod jam nuts against the ball links. This will prevent the pushrod from turning in flight.2110. Finished elevator servo installation shown below.

Repeat steps for other stab/elevator assembly22 

## Rudder Installation

1. Gather the rudder, five hinges, rubbing alcohol, petroleum jelly and epoxy materials as shown. Use 15-30 minute epoxy to ensure adequate working and cleanup time. 

## RUDDER AND PULL – PULL CABLE ASSEMBLY

2. Prep all hinges for installation by applying Vaseline petroleum jelly or light oil to the hinge joint. This ensures no epoxy gets into the hinge during assembly. 3. Mix epoxy in mixing c up and use a tapered stick to apply the epoxy inside the pre-drilled holes in the trailing edge of the fin. Apply epoxy to oneside of each hinge and insert the hinge completely into the hole. Ensure the hinge axis is vertical and parallel to the trailing edge of the fin before epoxy cures. Wipe away excess epoxy with alcohol wetted wipes.

4. Epoxy the hinges into the fin first and allow epoxy to fully cure.23 5. Mix epoxy in mixing c up and use a tapered stick to apply the epoxy inside the pre-drilled holes in the leading edge of the rudder. Apply epoxy to trailing edge of each hinge.

6. Carefully slide the rudder onto each hinge and against the trailing edge of the fin. Wipe away excess epoxy with alcohol wetted wipes. 7. Ensure there is no gap between fin and rudder. Allow epoxy to fully cure. Check you have full rudder deflection before epoxy fully cures.

Note: Use clear covering for sealing the hinge gaps. This is an optional step but is recommended



## Rudder Horn, Pull-Pull Cable and Servo Installation

1. Gather the rudder control linkage parts shownbelow. (2) rudder cables, (4) ball link assemblies, (2) flat washers, (4 ) threaded couplers with lock nut, (4) brass swaging tubes, (2) left and (2) right side control horns, and (12) wood

screws.24 2. Gather the rudder control horn parts as shown below. (2) ball link assemblies, (2) left and (2) right side control horns. Assemble the ball links between the control horns as shown. Secure with nylon lock nut. Start with the center hole in the control horn. The ball link may be moved up or down for more or less control throw.

3. Thread brass coupler half way into ball link.

Note: There are two types of 4-40 couplers supplied, (2) are for the throttle and chock pushrods and (4) are for the pull pull system. The ones with the hole in the base are for the throttle and choke. 4. Place the control horns over the predrilled mounting holes.

5. Use a drop of thick CA glue on each screw as shown.25 6. Mount rudder control horns using six wood

screws.

7. Repeat the above steps for mounting the other side rudder control horn.

8. Gather (1) rudder servo, (4) mounting screwsand (1) 2 3/4” double output arm as shown below.

Note: 180 in. oz. digital, metal geared servo is recommended. Servo selection can be the difference between a great flying model and a model that will crash. Always use brand name 9. Install the rudder servo in the servo cutout with the output shaft to the front.

Note: Remove balsa stick holding the elevator pull strings at this time. Secure the pull strings with tape until the elevator extensions are installed.FRONT

10. Feed one rudder cable through the pre installed cable exit tube in the rear of the fuse toward the front of the fuse. Repeat for other side.

Note: Loop or tape cable to fuse to prevent cable from being pulled into fuse26 11. Pull the rudder cables from rear of fuse to the rudder servo tray.

Note: Cables run parallel down fuse and do not cross each other.

12. Using an X-ACTO knife clean away any burrs from brass swags. This will allow the rudder cable to pass through brass swage easily. 13. Thread cable through brass swage tube.

14. Thread cable through the threaded coupler hole, and back through the brass swage tube as shown.27 15. Loop the cable back through the brass swage tube and pull tight.

16. Crimp the brass swage tube with a crimping tool or pliers. 17. Cut off excess cable as shown

18. A drop of thin CA may be applied to the swage tube to help secure the cable.28 19. Attach ball links to the rudder servo arm and then attach the servo arm to the rudder servo as shown.

Note: Use flat washers to prevent link from coming loose from the brass ball

20. Plug the rudder servo into the rudder channel of the receiver and power up. Turn on transmitter to center rudder servo. Ensure servo trim and sub trims are centered.

Note: On metal geared servos use blue Loctite for all Servo arm mounting screws. 21. Tape the rudder balance tab to the top leading edge of the vertical fin in the neutral position as shown. This ensures the rudder is straight when the cables are attached.

22. Attach the ball link to the rudder control horn as shown below. Follow the same steps as shown in the previous pages to install the ball link to the pull pull cable.29 23. Follow the same steps for the opposite side ofthe rudder as shown below. Rudder pull pull assembly is now complete.



## Tail Wheel Installation

1. Gather the tail wheel parts shown below. (1) Tail wheel strut, (1) leaf spring, (3) tail wheel mounting screws, (1) steering tiller, (2) tiller mounting screws, and (2) steering springs. 2. Align rudder tiller steering arm with pre drilled mounting holes at bottom of rudder.

3. Apply a drop of thick CA to the tiller armmounting screws before inserting in the predrilled holes.30 4. Mount the tail wheel steering tiller using two wood screws.

5. Place the tail wheel leaf spring on top of the tail wheel strut. Align the tail wheel with pre drilled mounting holes on the bottom of the fuse 6. Place a drop of thick CA on tail wheel strutmounting screws before inserting in the predrilled mounting holes on the bottom rear of the fuse.

7. Mount the tail wheel struts using three wood

screws.31 8. Attach the steering spring to the rudder tiller. Center the spring between both tail wheel and steering tillers.

9. Use pliers to twist spring end closed around the rudder steering tiller. 10. With spring centered between tiller arms and tail wheel centered, bend spring wire through tail wheel steering tiller.

11. Twist spring end tight with pliers.32 12. Repeat spring installation for other side.

13. Bottom view of completed tail wheel installation.33 

## Main Landing Gear Installation

1. Gather the landing gear parts as shown below:



### • (1) Landing Gear Strut



### • (4) 8-32 mounting bolts



### • (4) 4mm flat washers



### • (4) 4mm lock washers



### • (2) Gear Cuffs



### • (4) 4-40 mounting bolts



### • (4) #6 bonded washers



### • (2) Wheel Pants



### • (4) 4-40 mounting bolts



### • (4) 3mm flat washer



### • (4) 3mm lock washer



### • (2) wheels



### • (2) axles assemblies



### • (4) wheel collars 

## MAIN LANDING GEAR - GEAR CUFF AND WHEEL PANT ASSEMBLY

2. Remove the Phillips head screws holding the landing gear cover in place. 3. Align mounting holes of main landing gear with pre drilled mounting holes in fuselage mounting plate.

Note: Mounting holes have been offset to ensure proper installation of main gear.

4. Assemble the landing gear bolts with lockwasher and flat washer. Use a drop of blue Loctite on landing gear bolts before attaching the landing gear. Mounting holes have been offset to ensure correct installation34 5. Bolt landing gear strut to fuse with (4) 8-32 bolts and washers. Ensure tapered edge of the gear strut is facing toward the rear.

6. Reinstall the landing gear hatch cover. 7. Gather the landing gear cuffs, mounting bolts and bonded washers.

Note : There is a right and left gear cuff.

8. Slide the gear cuff onto the proper gear strut.35 9. Use the (2) 4-40 mounting bolts and (2) bonded washers to secure the gear cuffs to the landing
gear.

10. Repeat process for opposite side gear cuff.

11. Using lock nut install axle to gear.

Note: Do not tighten securely yet. 12. Align the flat sides of the axle bolt vertical and snug the lock nut against the landing gear strut.

Note: Do not tighten securely yet.

13. Align the wheel pant slot over the axle bolt as shown. Slide the wheel pant slot over the flat sides of the axle bolt and align blind nuts in wheel pants with mounting holes in landing
gear. Align axle bolt with front of gear36 14. Tighten the lock nut against the landing gear strut to secure axle.

15. Install the inner wheel collar on the axle. Use a drop of blue Loctite on the wheel collar set screw and tighten the wheel collar in place. 16. Install the wheel and outer wheel collar. Use blue Loctite on the wheel collar set screw before final tightening.

17. Final installation of wheel pant with two mounting bolts.

Note: Make sure wheel turns freely without binding or rubbing against the wheel pant. Adjust wheel collars in or out until wheel turns freely.37 18. Repeat above steps for other wheel and wheel pant.

19. Final landing gear installation shown below.38 

## Engine Installation

1. The 50cc Extra 300 will accept a wide range of engine types. The DA-50 rear carburetor engine with Pitts style muffler, was mounted and used for the test flights.

2. DA 50 with 2 1/2” Stand offs, Pitts style muffler and mounting hardware shown below.

Note: Mounting hardware is Not Supplied

. 2 1/2” stand offs available through Desert Aircraft.



### Mounting distance from front of firewall to front of engine prop hub: 

## 6 5/8” 

## ENGINE INSTALLATION

3. Locate the laser cut engine mounting template for either the DA-50 or 3W-50. If other engines are used the Universal template may be modified for any mounting pattern

4. To modify the universal mounting template to accommodate your engine of choice. Line up the laser etched thrust lines on the template with the engine thrust lines.39 5. Mark the location of the engine mounting holes on template.

6. Use a 1/4 drill bit to drill the engine mounting holes. Template is now ready for use. 7. Remove engine box top hatch cover.

8. Align mounting template with firewall and tape in place.

Note: Use following steps for all types of engine installations.40 10. Use blue loctite to secure the engine mounting bolts in place. This will insure that the mounting bolts stay in place over time. 11. Using mounting bolts and flat fender washers mount engine to firewall. Tighten the bolts evenly to prevent crushing of the firewall.

12. Distance from front of firewall to front of engine prop hub is 6 5/8”

.

Note: Use aluminum spacers (supplied) and washers (not supplied) to achieve correct distance. 9. Use a 1/4 bit to drill the engine mounting holes in firewall.



## 6 5/8”41 13. Attach the muffler to the motor at this time.

Note: Muffler will be removed during cowl installa- tion. It may be left off at this time in order to aid in cowl installation.42 1. Using a covering iron seal the covering around the air exit holes at fuse bottom as shown be- low. 2. Use a hobby knife to remove the covering around the hot air exit holes.

Note: Take care not to remove the covering from the tuned pipe hatch cover.



### 3. Remove the (6) Phillips head screws holding the canister hatch in place. 

## CANISTER INSTALLATION

Canister Installation
Gather the canister muffler parts as shown:

Shown: (1) KS 86 Canister (Rear Exit) (1) 25mm Drop Double Bend flex header (1) Teflon Coupler (2) Mounting Clamps (1) Canister Mounting Bracket-Supplied434. Canister mounting bracket location shown below.

5. Test fit canister mount in the fuse. If necessary sand canister mount to achieve proper fit. 6. Use 30 Minute epoxy to secure the canister mount as shown.

7. Reinstall the canister mount in the fuse. Allow epoxy to fully cure before moving on to the next step.44 

### 8. Canister mount viewed from front as shown below.

9. Assemble the canister to the header with the Teflon coupler and clamps in accordance with manufactures instructions. 10. Slide the canister into the canister tunnel as shown below.

11. Secure the header in place using the mounting bolts and gasket provided with your engine. Use blue Loctite to secure the bolts.45 12. Finished canister installation shown below.

13. Reinstall canister hatch as shown below. Canister installation is now complete.46 1. Using a covering iron seal the covering around the air exit holes as shown below. 2. Use a hobby knife to remove the covering around the hot air exit holes as shown.



### 3. Remove the (6) Phillips head screws holding the pipe hatch in place. 

## Tuned Pipe Installation

Tuned Pipe Installation
Gather the tuned pipe parts as shown:

Shown: (1) MTW RE2 Tuned Pipe (1) 25mm Drop Double Bend Flex

Header (1) Teflon Coupler (2) Mounting Clamps (1) Pipe Mounting Bracket – Supplied Do not remove covering from canister stinger exit

holes as shown below47 4. Tuned pipe mounting bracket location shown below.

5. Test fit pipe mount in the fuse. If necessary sand pipe mount to achieve proper fit. 6. Use 30 Minute epoxy to secure the pipe mount as shown.

7. Reinstall the pipe mount in the fuse. Allow epoxy to fully cure before moving on to the next step.48 

### 8. Pipe mount viewed from front as shown below.

9. Remove engine to allow easier tuned pipe installation. 11. Slide the tuned pipe into the pipe tunnel as shown below. 10. Assemble the tuned pipe to the header with the Teflon coupler and clamps in accordance with manufactures instructions.49 12. Reinstall engine as shown below.

13. Secure the header in place using the mounting bolts and gasket provided with your engine. Use blue Loctite to secure the bolts.

16. Finished tuned pipe and hatch assembly shown below.15. Reinstall pipe hatch as shown below. Pipe installation is now complete.

14. Finished tuned pipe installation shown below.50 

## Throttle Servo and Choke Installation
1. Gather the left and right plywood throttle and choke servo mounting trays, the throttle and choke servos, servo arms and pushrod parts as shown below.
(2) x 4-40 metal rods threaded at one end (4) x 4-40 ball links and hardware (4) x brass spacers (2) x 4-40 threaded solder couplers (2) x 4-40 threaded quick links

2. Use a 1/4” bit to drill a pushrod exit hole in thefirewall in line with the engine carburetor throttle arm. 3. Assemble ball link to threaded end of pushrod.

Note: Thread ball link half way onto pushrod to allow for proper adjustment during final installation.

4. Attach throttle pushrod to the carburetor throttle arm with the 4/40 ball link51 5. Assemble brass threaded coupler to 4-40 ball link and ball link and brass spacer to the servo arm as shown below.

6. Install throttle servo into servo mounting tray. 7. Assemble servo arm to servo at 90 degrees to servo. Align throttle servo with throttle pushrod and mark servo mounting location. Ensure thethrottle pushrod will line up with the servo output arm with no binding.

8. Check that mounting position of servo tray will not interfere with fuel tank installation.52 9. Apply 5 minute epoxy to the side of the servo mount that will be in contact with the engine box side.

10. Install the servo mount to the inside of the engine box as shown. Use tape or clamps to ensure the servo mount does not move until the epoxy sets. 11. With servo arm still 90 degrees to servo and throttle arm of carburetor in the center or half throttle position. Mark the cut location for the throttle push rod.

12. Remove pushrod from throttle arm on carburetor and cut throttle pushrod to length.53 13. Gather the soldering tools as shown below.

Note: For best results we recommend a high quality Silver Solder like “Sta-Brite” silver solder.

14. Lightly sand end of pushrod for best bond. 15. Solder the threaded brass coupler to the end of the throttle pushrod.

16. Attach the throttle pushrod with the 4/40 ball links and secure. Power up the receiver andthrottle servo and adjust pushrod for proper operation. Ensure the servo or rod does not bind or jam at closed or full open positions.54 17. If installing a choke servo use the providedmounting tray and hardware shown below. Following same installation steps used for installing throttle servo install choke servo.

18. If a manual choke will be installed gather the choke pushrod, ball link, wheel collar and nylon ties as shown. Wheel collar and ties are Not Supplied. 19. We recommend installing the carburetor choke pushrod as shown. Use nylon ties to providesupport and holding friction for the choke pushrod. Place silicon fuel tubing over the wire pushrod to prevent damage from vibration and provide holding friction. Place a wheel collar on the end of the pushrod to provide a finger grip.

20. Location of manual choke pushrod shown below.55 1. Gather the ignition module, battery, switch, regulator and installation parts as shown below. 

## IGNITION INSTALLATION

2. Position the ignition module on the side of the engine mounting box and mark the location of the nylon tie holes as shown. 3. Use a 1/8” bit to drill the ignition module mounting holes.

4. Thread nylon tie through mounting holes.56 5. Roll the supplied foam rubber to make a 4 layer pad as shown. Make the pad slightly larger than the ignition module.

6. Mount the engine ignition module using nylon tie and foam rubber as shown. 7. Connect ignition module to pickup line of engine. Secure with Safety Clip, safety wire, tape or other method. Ensure the plugs will not come apart from vibration or light tension.



### 8. Secure ignition wire with nylon ties as necessary.57 9. Mount ignition battery on opposite engine box side with nylon tie and foam padding.

10. Switch mounting location is at builders discretion. Mark the location for the ignition switch using the switch mounting plate for a template. Using a modeling knife cut out the switch hole.

Note: Ensure switch location does not interfere with the mounting of the wing. 11. Mount switch in accordance with the switch manufacturers instructions and hardware.

12. Mount ignition regulator as desired. Secure all connectors with tape, safety clip or similar.58 

## Fuel Tank Assembly

1. Gather the fuel tank parts as shown below.



### • Fuel tank



### • Hardware



### • Brass barbs



### • Fuel tubing 

## FUEL TANK ASSEMBLY AND INSTALLATION

2. Locate the (2) supplied brass fuel barbs. Solder a brass fuel barb to the fuel line pick up tube. Thiswill keep the weight of the fuel clunk from pulling the fuel line off the brass tube.

Note: No brass barbs are required for the air vent lines. 3. Assemble the fuel pick up line, rubber stopper and metal end caps. As shown below.

4. Solder a brass fuel barb to the other end of the fuel pick up line.59 5. Final assembly of rubber fuel stopper with fuel pick up tube shown below.

6. Install air vent tube into rubber stopper and bend upward.

Note: No brass barbs are required for the air vent tube. 7. Install the fuel tubing and clunk. Secure the fuel tubing with nylon ties to the pick-up tube and clunk.

8. Insert the rubber stopper assembly into the tank with the vent tube at the top of the tank.60 9. Secure the rubber stopper with set screw. Take care not to strip threads by over tightening set

screw.



## Fuel Tank Installation

1. Gather the fuel tank parts as shown below. Fuel tank, fuel tubing, foam rubber, fuel “T”, fuel filler dot, fuel filter and nylon ties.

Note: The fuel “T”, and fuel filter are not supplied, but are available through Aeroworks. 2. Install a short piece of fuel line and the fuel “T” to the fuel pick up tube.

Note : Using a heat gun to soften the fuel line will help with the installation of the fuel “T”.

3. Install the fuel filter, fuel pick up and fuel filler lines to the fuel tank.

Note: It is recommended you always use a fuel filter in the fuel line to the carburetor.



### T Filter

Fill Line Carb61 4. Use small nylon ties to secure fuel line.

Note: Gasoline will cause the fuel line to expand over time. Always secure fuel lines with nylon ties to prevent them from pulling off during flight.

5. If using both a fuel and smoke tank position the tanks on their sides as shown below.

Note: It will be necessary to drill the hold down lo- cations as shown if using both the fuel and smoke tanks. 6. Thread nylon ties under tank mounting plate and center in position.

7. Install foam rubber pad for fuel tank to rest on.Foam rubber will help prevent fuel from foaming or getting air bubbles from engine vibration62 8. Install the tank. Run the fuel pick up line to the engine. Secure the tank with the two long nylon ties trim away any excess nylon tie as shown.

9. Gather the fuel filler dot and drill bits as shown below.

Note: We recommend you start with a smaller size drill bit then increase the bit size to the correct size to fit your filler dot. This will help prevent the fuse side from splitting or cracking. 10. Mark location of fuel filler dot.

11. Drill hole to accommodate fuel filler dot.63 12. Use thick CA to secure fuel dot in fuse.

13. Feed filler line through dot and plug line into filler plug as shown. 14. Secure fuel pick up line to engine carburetor with small nylon tie.

15. Route the vent line on top of the fuel tank and secure with small nylon ties as shown. This will stop excess fuel from draining out the vent line during an extended down line or when lifting the tail.64 16. Feed vent line tubing through bottom of fuse. Cut off excess fuel line.

Note: Place a zip tie around the vent line as shown. Be careful not to tighten the zip tie to the point of closing the vent line. This will pre- vent the vent line from falling back inside the fuse and flooding the airplane with gas during fueling.65 1. Gather the radio components as shown below. Battery, Switch, Regulator if used, receiver, foam rubber and Velcro one wrap straps. 

## RADIO INSTALLATION

2. Mount radio switch in accordance with the switch manufacturers instructions and hardware.

Note: Ensure switch does not interfere with wings or cowl installation. 3. Install regulator in accordance with manufacturers recommended installations.

4. Install battery using foam padding and Velcro one wrap straps.66 5. Install receiver using foam padding and Velcro one wrap strap as shown.

6. Install the receiver antenna in the pre-mounted antenna tube. Push the antenna into the antenna tube, be sure that the antenna is all the way into the tube.

Note: Placing baby powder on the antenna will aid in sliding it through the tube. 7. Place tape on the antenna and tube, this will keep the antenna from backing out of the tube.



### 8. Finished antenna installation shown below. Tape antenna to fuse floor if desired.679. Typical radio installation shown for heavier engine selections.

Note: If models CG is tail heavy move batteries forward. If models CG is nose heavy move batteries to the rear.

10. Reinstall engine box top hatch cover.68 1. Remove muffler as shown below. 

## COWL INSTALLATION

2. Gather the materials as shown below. Template material, hobby knife, ruler, tape, marker and pencil. 3. Tape the provided template material to the bottom of the fuse as shown below.

4. Use a T-Pin to mark the location of the bottom cowl mounting bolts onto the template.69 5. Enlarge mounting holes using a hobby knife as shown.

6. Use the bottom mounting bolts to keep the template secure. This will provide a consistent point of reference when marking and cutting the cowl. 7. Mark “Cowl Side” on the top side of the template. It is very important that the template does not change position when attached to the cowl.

8. Trace around the head of the engine being careful to keep the template in the same location.70 9. Use a hobby knife to cut out the engine cylinder exit opening as shown.

10. Check the fit of the template at this time. It may be necessary to make small adjustments to the cutout to get it to fit properly. 11. Using cowl mounting bolts align template with bottom of cowl. Use a felt tip marker to transfer the template cutout pattern to the cowl and mark cut location.

Note: Pay close attention to the marker you choose. Some permanent markers may not be easily removed. Also, When using rubbing alcohols or other paint removers, always test on painted parts before using!

12. Remove the template and use a rotary cutting tool and sanding drum to cut out the openings in the cowl.

Note: Take care not to cut or scratch the cowl.71 13. Install the cowl and check that everything fits correctly and nothing rubs against cowl. If needed enlarge the cutouts and test fit again until everything fits correctly.

14. If using canister or tuned pipe locate the pre-cut template and cut the hot air exits as shown. Ifusing a pitts style muffler move on to the following steps. 

### Cutting Cowl For Muffler Installation

1. Gather the pitts style muffler as shown below.

2. Enlarge the template that was made in an earlierstep to create the muffler template as shown below.

3. Follow the same marking and cutting method as described for the engine cylinder.72 4. It will be necessary to turn the cowling as shown in order to clear the muffler for installation.

5. Mount cowl to the fuse using (4) 4-40x16mm button style hex head bolts (4)#6 bonded washers731. Gather (4) 8-32 wing mounting bolts, (4) #8 rubber backed washers and (4) hairpins for preparation of mounting the wings. 

## PRE-FLIGHT PREPARATION

2. Slide the wing tube in the fuse wing tube sleeve. Slide the wings on the wing tube and plug in the aileron servo connectors. Slide the rubber backed washers on the wing mounting bolts and insert bolts through the fuse side and into the wing root blind nuts. Tighten snugly but do not over tighten and crack the fuse or wing root wood. 3. Attach the 6” extension to the servo lead and secure with Aeroworks Safety Clip. Ensure the connectors will not come apart from vibration or light tension.

4. Install hairpins into both front and rear aluminum anti-rotation wing dowels to provide additional security.74 7. Gather (2) 4-40, (2) 6-32 cowl mounting bolts and (4) #6 small rubber backed washers.

8. Mount the cowl using the cowl mounting bolts and rubber backed washers. The rubber backed washers are to prevent the fiberglass cowl from cracking and to prevent mounting bolts from loosing from normal engine vibration. 6. Slide the stab tubes in th e fuse stab tube sleeves. (Long Back / Short Front) Slide the stabs on the stab tubes and connect pushrod to servo arm. Slide the rubber backed washers on the stab mounting bolts and insert bolts through the stab mounting tabs and into the fuse blind nuts. Tighten snugly but do not over tighten and crack the stab mounting tabs or the fuse sides. 5. Gather (4) 4-40 stab mounting bolts and (4) #6 small rubber backed washers.75 10. Slide the rubber backed washers on the hatch mounting bolts and insert bolts through the hatch mounting holes and into the fuse blind nuts. Tighten snugly but do not over tighten and crush the hatch or the fuse sides. 9. Gather the (4) 4-40 hatch mounting bolts and (4) #6 small rubber backed washers.
Note: It is highly recommended you apply thin CA glue to the front hold down dowels. This is a High vibration area and can loosen the front dowels.

Always check the front dowels are secure before each flying session



### Us thin CA to

secure front hatch hold down dowels76 

## Decal installation

1. Decals supplied with the kit may vary from the photos below. Decal installation instructions are for reference purposes only.Gather supplied decals, transfer tape, ruler, scissors, hobby knife, plastic squeegee or credit card, Windex or Application fluid like Rapid Tac . Also, a solution of 1 drop of dish detergentto a cup of water sprayed on the model will assist in proper positioning.

Note: Clean surface and tighten all covering before any decals are applied. 

## DECAL INSTALLATION

2. Placement of optional decal package shown, included decals will differ. 3. Placement of optional decal package shown, included decals will differ.77 4. Using rubbing alcohol or glass cleaner. Clean all areas before any decal installation.

Note: Decals and model shown in following steps may very from your model. Decal installation will be similar

5. Tighten all covering prior to any decal installation. 6. Remove backing from decal sheet.

7. Spray model surface with application fluid, Windex or soapy water solution.78 8. Spray back side of decal with application fluid, Windex or soapy water solution.

9. Position decal in proper location. Application fluid will allow decal to be moved slightly. 10. Using a plastic squeegee or credit card. Spread decal smooth and remove all excess application fluid. Let decal set until dry enough to be able to remove transfer tape with out removing decal. Do not leave until completely dry or transfer tape will be difficult to remove.

11. Pull transfer tape from top of decal. Take care not to pull away or damage decal.79 12. Finished decal installation. Work slowly and carefully and you will be rewarded with a beautifully finished model.80 

## Center of Gravity (C.G.)



## 4” Back from the wing Leading Edge measured at the wing tip Warning Do not skip this step! 

## CENTER OF GRAVITY - CONTROL THROWS

2. Balance the 50cc EXTRA 300 ARF-QB without fuel in the tank with the batteries installed andready to fly. The engine, radio, servos, and battery you use will determine the final weight and locations of equipment. Try to balance the model by moving the battery and receiver before adding any ballast.

Note: Model should sit level when lifted from the wing tips 3. Start at recommended CG until you are comfortable with the flight characteristics of the aircraft. You may find this a bit nose heavy at first butthat is fine to start with. After you are comfortable adjust the CG to su it your flying style insmall steps, especially when shifting the CG toward the tail. Move the battery or add small stick on weights to the nose or tail as necessary.

4. For aerobatic flying a more aft balance point is better. For smooth sport flying a more forward CG is better. An aircraft that is too nose heavy does not fly well and is difficult to land. A tail heavy aircraft is uncontrollable and will likely crash.

5. We have test flown the model at 3 3/4” to 4 1/4” C.G. locations and found the model to fly well at all locations. However, best flight performance was achieved at the 4” location.



## Control Throws

1. The amount of control throw should be adjusted using mechanical means as much as possible and then electronically with the radio. The controlthrows are shown in degrees and inches of deflection measured at the widest point of the control surface for both low and high rates.

2. Use the widest part of the aileron as shown to measure the aileron throw in inches.81 3. Use the widest part of the elevator as shown to measure the elevator throw in inches.

4. Gather the Rudder Throw Meter ( Supplied ) and scotch tape. 5. Slide the throw meter under the rudder boost tab.

6. Center the throw meter on the rudder using thecentering marks on the meter to aid with alignment. Bend the precut positioning tabs down around the fin.82 7. Secure the tabs to the fin using scotch tape.

8. Degrees are measured at the tip of the boost tab as shown below. 

### 9. Use the supplied flight control deflection meter to measure the throws in degrees 

### . Prop up thetail of the aircraft until the fuselage is parallel to the table top.

10. Use the widest part of the aileron to measure the aileron throw in degrees.

11. Use the widest part of the elevator to measure the elevator throw in degrees..83 

## Control Throw Deflection Table

Low Rate High Rate

Aileron 1 3/4” or 18  ̊ up 2 1/2” or 25  ̊ up 1 3/4” or 18  ̊ down 2 1/2” or 25  ̊ down

Rudder N/A” or 25  ̊ left N/A” or 35  ̊ left N/A” or 25  ̊ right N/A” or 35  ̊ right

Elevator 1 1/4” or 12  ̊ up 2” or 20  ̊ up 1 1/4” or 12  ̊ down 2” or 20  ̊ down

For 3D flying use the following throws:

3D Rate

Aileron 3 1/2” or 40  ̊ up 3 1/2” or 40  ̊ down

Rudder N/A” or 45  ̊ left N/A” or 45  ̊ right

Elevator 4 1/2” or 45  ̊ up 4 1/2” or 45  ̊ down

We recommend 15% Expo on low rates, 30% expo on high rates, and 60% expo on 3D rates as a starting point. You a can adjust from there to suit your own flying style. 

## Preflight Checks

Center of Gravity : Check CG is set properly.

Engine : The engine should run smoothly at all throttle settings with smooth transition fromidle to full throttle without stalling or hesitation. Do not fly an unreliable engine. Readengine instructions including break in and tuning completely.

Prop balancing: Ensure prop is properly balanced prior to mounting on engine.

Flight Controls: Ensure all flight controls are free from binding and are centered. Check that all hinges are tight and will not pull out. Control linkages must be rigid and tight andhave no slop. Confirm proper direction of ailerons, rudder, and elevator. Experienced flyers have lost airplanes due to reversed ailerons. Right roll is right up, left down. Left roll is left up, right down.

Batteries : Transmitter, ignition and receiver batteries are fully charged.

Fasteners : Check all engine bolts, wing bolts, hatch bolts, servo screws, control horn bolts, wheel collars, and clevis keepers are tight and

secure.

Covering: Check all covering and seams are sealed and secure.

Radio : Check trims set to neutral and controls centered. Check rate and condition switches set properly. Check the receiver antenna is fully extended and not reversed on it self.

Range check : Do a range check with and withoutthe engine running in accordance with the radio manufacturer instructions. If there is insufficient range or a large reduction with the engine running, do not fly until it is resolved!

Fuel : Fill the fuel tank before each flight.84 

## Aerobatics

The 50cc EXTRA 300 ARF-QB is capable of anyaerobatic maneuver. After you gain some confidence and little experience flying the airplane you can cut loose and perform any maneuver you can think of. Here is a list of some of the more popular aerobatic and 3D maneuvers you can try:



### • Loops and rolls



### • Knife edge flight



### • Stall turns



### • Snap rolls



### • 2, 4, and 8 point rolls



### • Slow rolls



### • Spins upright and inverted



### • Flat Spins upright and inverted



### • Harriers upright and inverted



### • Water falls



### • Torque Rolls



### • Rolling circles

The sky and your imagination are you only limits.



## FLY and ENJOY!


# AEROWORKS85 

# 50 cc EXTRA 300 ARF-QB NOTES

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