HDTenEightyP/NetNews huggingface dataset:
From: ntaib@silver.ucs.indiana.edu (Iskandar Taib)
Subject: Re: Puma engines?
Organization: Indiana University
Date: Sun, 23 Aug 1992 16:00:21 GMT

In article <22935@hacgate.SCG.HAC.COM> lew@4ccvw46.UUCP (Lyman Lew) writes:
>In article <Bt6r4t.Dn6@usenet.ucs.indiana.edu> ntaib@silver.ucs.indiana.edu (Iskandar Taib) writes:
>>In article <22918@hacgate.SCG.HAC.COM> lew@4ccvw25.UUCP (Lyman Lew) writes:

>>>Wow, if the motors were that cheap, I'll start flying FAI Combat! 8-)

>>Hmmmm... thing is these days the only things competitive are the 
>>lightweight Russian engines and the special rear intake Nelson
>>2.5s with the titanium cranks. You get the idea  8-)

>Ugh, another case where if I don't have the latest and greatest,
>(greatest=$$$$) I'll just end up being shark bait for the combat
>guys 8-(

Heh.. I fly against the big boys (who fly Nelson .36s etc..) with
Leo and Royal .28s.. While I don't win a heckuva lot I'm not exactly
shark bait either. While I didn't do too well up in Chicago (one 
really bad midair, one sour engine run, one bad crash into the 
ground) I didn't give up a single cut or kill, and scored a kill 
myself. I also came within a half inch of getting a kill off Gary
Arnold, who was flying a Nelson.

I'd say give it a try... 8-) If nothing else look for someone's 
old G21/36 Supertigres or used Max .35FP...


>>However there is absolutely nothing to prevent you from getting 
>>together with your club mates and building a bunch of Gotcha 
>>400s, sticking PUMA .15s on them and flying them on .015x52'
>>lines. FAI airplanes are probably the most fun to fly. They are 
>>light and agile. 

>>Hmmm mebbe I'll buy one anyhow...

>Not if I buy one first ;-) But seriously, there are a lot of cheap
>foreign .15's out there from India, China, etc. you might want to
>check out. I seen a few through Carlson Imports in Arizona. He has
>a catalog and carries a wide range of motors from Great Britain,
>Russia, Czech., etc.

Hmmmm true.... I was up at Indy R/C yesterday and they had Chinese 
SY .15s. $150 engines though... The .15 was a popular size at one 
time but I was thinking in terms of the new Taiwanese R/C motor 
mills who don't make .15s. 

By the way..the Czechs had MVVS motors for sale at Muncie. The ones 
I saw were .60s but I ought to have asked if they had .15s...its a 
little hard when you don't speak a word of Czech and they don't know 
any English.






-- 
-------------------------------------------------------------------------------
Iskandar Taib                          | The only thing worse than Peach ala
Internet: NTAIB@SILVER.UCS.INDIANA.EDU |    Frog is Frog ala Peach
Bitnet:   NTAIB@IUBACS                 !
From: joar@stud.cs.uit.no (Joar Ankarstein Larsen)
Newsgroups: rec.models.rc
Subject: Douglas A-1H Skyraider
Date: 13 Aug 92 11:01:21 GMT
Organization: University of Tromsoe, Norway

Are there someone out there who ever have seen a
scale-plan over Douglas A-1H(AD-6) Skyraider?
Does it exist, if so where can I get it from?

Joar
Newsgroups: rec.models.rc
From: basiji@milton.u.washington.edu (David Basiji)
Subject: Electric plane + radio for sale
Reply-To: basiji@u.washington.edu
Organization: University of Washington, Seattle
Distribution: pnw
Date: Tue, 18 Aug 1992 05:32:38 GMT


For Sale:
--"Electra" powered glider (fully assembled, very good condition)
--electric motor (stock, came with kit; quite powerful)
--7-subC battery pack (with 3 spare cells)
--12V, 30 min. battery charger (Aristo-Craft, with peak detect and timer)
--4 channel (chan 31) "1991 approved" Airtronics FM radio and receiver
	(with chan. reversers and rechargeable batteries, charger, like new)
--three servos (installed as rudder, elevator, motor on/off) 
--lotsa random stuff you need to fly.
   (this includes cig. lighter/banana plugs/heavy duty alig. clips for
	the charger, about 40 gm of zapAgap glue, foam tape, rubber bands,
	box of 30 amp fuses (!) for the motor, spare balsa, all original
	plans and parts in their orig. box, many spare grommets, servo horns,
	bushings, etc., soft nylon field case.)
  
This is a good rig for beginners and intermediates.  It has a wingspan
of over 6' and has a very good powered rate of climb.
I posted this about 2 months ago at which time it needed repair to the
wings which I had broken down for shipment.  I have repaired the wings
(in my copious spare time ;o) but I still haven't been able to find the
time to fly, hence, it's back up for sale (at a lower price).

I originally paid over $350 for it.  Asking $150 or best offer.

Dave
basiji@u.washington.edu
527-9172

Newsgroups: rec.models.rc
From: mkfeil@bcrki9.bnr.ca (Max Feil)
Subject: Re: Anybody with experience in 2IM problems please contact me by email
Reply-To: mkfeil@bcrki9.bnr.ca (Max Feil)
Organization: Bell-Northern Research, Ottawa, Canada
Date: Fri, 14 Aug 92 23:08:21 GMT

In article <5874.2a8bc3b9@hayes.com>, bcoleman@hayes.com (Bill Coleman) writes:
> Well, knowing considerably more about radio than he, I knew that intermod
> (intermodulation distortion) is a receiver phenomenon. 

I don't think this is right. When two wave sources act, sum and
difference frequencies are created. (An example is the beating you hear
when holding two pitchforks. These frequencies are present in the
spectrum and can be mathematically derived, similar to the derivation of
the sidebands of an AM transmission). I can believe that the combination
of the two signals is affected by how close together the sources are,
I'm just not sure why. 

One possibility is if the transmitters are closer than  one wavelength, we
might get certain effects. One wavelength in 72Mhz is about 12 feet.
Does anybody know what's going on here for sure?

Cheers!
Max 
--
Max Feil  mkfeil@bnr.ca | Disclaimer:
Bell-Northern Research  |   What do I know? I'm just a Nerd on the Big Ranch.
P.O Box 3511 Station C, |
Ottawa, Ontario, Canada.| "Enrich The Soil, Not EveryBody's Goal" -Peter
Gabriel
From: ken@wyse.wyse.com (Ken Drottar x2582 dept303)
Newsgroups: rec.models.rc
Subject: Re: 2WD 1/10th offroad
Date: 19 Aug 92 17:55:02 GMT
Organization: Wyse Technologies San Jose, Ca

In article <1992Aug13.222609.19155@beaver.cs.washington.edu> waynew@cs.washington.edu (Wayne Wong) writes:
>
>Just some questions...
>
>(1) After about a month of racing my RC10 Team car, I noticed some
>	marks on the dogbones/universals(?) close to the outdrive hubs of
>	the transmission...  
>	Are these
>	markings typical?  Is it due to an incorrect setup or just part
>	of what happens when the rear a-arms are put at extreme angles?
>
	Drop your fully loaded car about 6". Look at the car. The rear lower
	a-arms should be parallel with the bench. The ground clearance at the
	front of the car should be just a little bit higher than the rear. 
	Clearance should be uniform from left to right. Adjustments should
	be made to shock spring preload to compensate for any variances.
	So now your car is correctly set up.

	The other issue that comes to mind are the shims (thin washers) that
	are used to minimize universal play. I have usually found that the
	supplied amount of shims is about one short. Get more! This may help 
	minimize those marks.

				-ken
>
>Thanks,
>Wayne

		You're welcome!

-- 
Ken Drottar						Email: ken@wyse.com
Systems Division  					Phone: (408)473-2582
Wyse Technology						Fax:   (408)473-2401
Organization: University of Maine System
Date: Thursday, 13 Aug 1992 13:27:03 EDT
From: <IO10046@MAINE.MAINE.EDU>
Newsgroups: rec.models.rc
Subject: RC PLANE EQUIPMENT FORSALE

  All items are basically new and are in super shape.
                                                      Paid     Selling
JR MAX 4 FM Radio with 3 507 servos                  $140     $100
FOX 40 BB SCH ported engine with muffler             $65      $45
Dubro EZ FILL Pump and Container                     $15      $10
Tower Hobbies Deluxe 12v Starter                     $20      $15
Tower Hobbies Glow Driver                            $4       $2
Tower Hobbies Power Panel                            $20      $15
Tower Hobbies Field Battery                          $10      $7
Hobbico 12v charger                                  $10      $7
Hobbico Custom sealing iron                          $18      $12
Replacement parts for FOX 40                         $10      $5

      Reply by Email or cal 207-848-7803 and leave message.

Newsgroups: rec.models.rc
From: bobwo@ecs.comm.mot.com (Bob Woodhouse)
Subject: Re: Anybody with experience in 2IM problems please contact me by email
Organization: secure_comm
Date: Thu, 13 Aug 1992 11:52:45 GMT

In article <1992Aug12.111135.2223@inland.com> bloom@inland.com writes:
>In article <1992Aug06.183610.2984@bmerh85.bnr.ca>, mkfeil@bcrki9.bnr.ca writes:
>> I am in the process of trying to convince my club that 2IM is a real problem
>> now that odd channels are much more common. Any two transmitters operating 23
>> channels apart have the potential of wiping out every single conversion
>> receiver no matter what channels the receivers are on. This is because a 23
>> channel spacing is 460 Khz, which is very close to the 455 Khz intermediate
>> frequency of single conversion receivers.
> 

>The easiest solution is for your club to make everone fly with dual conversion
>receivers.  At my field in the suburbs of Chicago, single conversion AM 
>receivers are pretty useless.  I have witnessed 3 crashes as a result of 
>some kind of radio interference hitting Futaba Attack AM receivers (Futaba 
>claims these are narrow band, but they are not dual conversion).  I don't 
>believe it was 2IM interference as noone else was flying.  I can only guess 
>it was pagers.


I am not familiar with the typical RC receiver design, and I do not know
what "2IM" stands for (second intermodulation frequency?).  I also am not
familiar with dual conversion receivers, at least by that name.  I am
curious and would appreciate any postings that explain these things.  Do
receivers usually report is they are of the dual-conversion type?  Maybe
the fact that I am one of those few RC-car sorts explains why I haven't heard
of this topic before.

Good day,
Bob Woodhouse
From: larry@peak.psl.nmsu.edu (Evil Engineer doin' it the Cowboy Way)
Newsgroups: rec.models.rc
Subject: re: COMBAT.GIF
Date: 20 Aug 92 21:33:55 GMT
Distribution: rec.models.rc
Organization: New Mexico State University, MetaPhysical Science Laboratory

Hilarious! Great cartoon, Iskandar.

Hill can really draw. Got any more like that?

  (..)
   ~~
L.
_____________________________________________________________________________
                                    | Larry E. Cunningham          |   
             ____                   | %Physical Science Laboratory |  _~~_
   |        | ___\          /~~~|   | New Mexico State University  | (O)(-)
  _:_______|/'(..)`\_______/  | |   | Las Cruces, NM USA 88003     |  /..\
 <_|``````  \__~~__/  USAF ___|_|   | larry@psl.nmsu.edu           |   ==
   :\_____(=========,(*),--\__|_/   |----------------------------------------
   |       \       /---'            |"Yeh, Buddy..                   
            | (*) /  Mustangs       | I've got your COMPUTER!        
            |____/   Forever        | Right HERE!!"           (computer THIS!)
____________________________________|________________________________________
Opinions expressed here are CORRECT, and all mine, not PSLs and not NMSUs..
Do NOT use the term FAT around me. I'm NOT fat. I'm gravitationally challenged.
From: jrp@bohra.cpg.oz.au (John Pitman)
Newsgroups: rec.models.rc
Subject: foam cores
Date: 20 Aug 92 06:12:40 GMT
Organization: Computer Power Software

Hi
I have used foam cores with both balsa and veneer(1mm). the veneer is harder,
you dont need to glue bits together to mak a big piece, but it needs MORE
sanding to get texture off before painting. Also cheaper - 8'X4' $A3. I use
latex to glue it on, but always dope the skin to stabilise and prevent moisture
buckling it and lifting it off foam. some guys have good results with heat 
activated contact glues, but I have not. I usually remove some of the centre
of the tips (by coring it with a brass tube sharpened at the end) because you
dont need ant strength out there, and the lower themass out there the quicker
the roll rate!
jp
From: torsten@rnivh.rni.sub.org (Torsten Leibold)
Newsgroups: rec.models.rc
Subject: Re: Responses from Engine troubles
Date: 18 Aug 92 11:56:02 GMT
Organization: Rhein-Neckar-Informationsdienst Viernheim

jam@ee.uwm.edu (Jeff McKelvey) writes:

>   from that point.  As it turns out this screw was in too far (only about 
>   1 turn from the closed position), causing a lean mixture I suppose.

Yep.

>After doing the above, a couple of more questions have come up.  First of
>all, what is 2 cylcing and 4 cycling?  I didn't realize a 2 cycle engine
>was capable of 4 cycling.  How do you tell the difference?  Also, I
>noticed that the engine reaches peak RPM when the needle valve is about
>6 turns out, from the responses I've been getting and from the manual
>this seems like a lot, is it?  Should it be closer to 2 or 3?

4 cycling, for sure, does not mean that your engine really works in 4
separate cycles. It just means that the mixture is so rich, that the
glow plug cannot cause ignition every 2nd cycle but only every 4th
cycle. This causes a very low sound due to the fact that your engine
has one ignition per two revolutions (like a real 4 stroke engine).
If your engine has that typical high-pitched sound of a 2 stroke
engine it's no more 4 cycling ...

6 turns out is really a lot !! This is evidence that something must be
wrong in fuel supply. Check the nipple in the muffler whether it's
blocked by oil cake or something like that.
If you haven't the possibility to totally remove the fuel from the
tank on the end of flying and you pause for some days, there's the
possibility that the castor oil in the fuel resinifies. This could
accidentially block the fuel supply lines. Or perhaps the diameter of
your fuel lines is to small to provide the carburettor sufficiently
with fuel. Has that plane/motor crashed yet ?? Then the needle could
be bent. So 6 turns out would be ok, but that's really the only case
in which so many turns would be justified.

Ah, I almost forgot: Another reason for a lean mixture in flight (like
you discribed it) could be the existence of foam in your tank caused
by motor vibrations. Is your tank protected against those vibrations
(i.e. with foam rubber) ?? Anyway, try to protect it better, it's also
useful to prevent the tank from being damaged in crashed =:).

Hope I could help you.

Bye,
  Torsten.

-- 
+-----------------------------------------------------------------------------+
|       Torsten Leibold, Hard- und Software, Viernheim, West Germany.         |
|   UUCP: torsten@rnivh.rni.sub.org  ..!unido!cat!orfeo!rnihd!rnivh!torsten   |
+-----------------------------------------------------------------------------+
From: cwatters@acorn.co.uk (Colin Watters)
Newsgroups: rec.models.rc
Subject: 2IM problems - also in the UK
Date: 14 Aug 92 12:31:02 GMT
Organization: Acorn Computers Ltd, Cambridge, England


In article <1992Aug06.183610.2984@bmerh85.bnr.ca>, mkfeil@bcrki9.bnr.ca writes:

> I am in the process of trying to convince my club that 2IM is a real problem
> now that odd channels are much more common. Any two transmitters operating 23
> channels apart have the potential of wiping out every single conversion
> receiver no matter what channels the receivers are on. This is because a 23
> channel spacing is 460 Khz, which is very close to the 455 Khz intermediate
> frequency of single conversion receivers.

I don't know if anyone outside the US replied but we have the same problem in
the UK on the 35MHz band. For a while you could not get crystals for channel
numbers above (our) no. 80 were available.

When numbers 80+ became available we had problems with people on low channel
numbers (60ish interfering with channels 80+). On closer examination these
turned out to be 23 channels apart.

Our channel spacing is 10 KHz so 23 channels is 230KHz = half the IF (455KHz).

I believe the recommendation from the BMFA (British Model Flight Association)
is to avoid channels 80+ or put two pegs on the board.

I also believe the problem is one-way (ie 83 does not interfere with 60).





 


 ---------------------------------------------------------------------------
|            _          | Email: cwatters@acorn.co.uk (Colin Watters)       |
|    _      \ \         |                                                   |
|   | \______\_\_____   |---------------------------------------------------|
|   |-________--_____\  |                                                   |
|            / /        | Do it by remote control !                         |
|           /_/         |                                                   |
 ---------------------------------------------------------------------------
From: shane@peeker.uucp (Shane R. McCarthy)
Newsgroups: rec.models.rc
Subject: Re: Switching to Ailerons -- How easy?
Date: 18 Aug 1992 10:05:15 GMT
Organization: Not an Organization
X-NewsSoftware: GRn 1.16e (7/4/92) by Mike Schwartz & Michael B. Smith

In article <1992Aug17.205424.27800@beaver.cs.washington.edu> tod@cs.washington.edu (Tod Amon) writes:
> Any words of wisdom on switching from a a polyhedral based glider
> to my almost finished Chuperosa with 7032 and ailerons?  How easy
> is it to make a fatal mistake when just learning to fly with
> ailerons?  After putting so many hours into my new plane, you'd be
> right if you thought I was a bit nervous to actually go fly it!

   I just recently (last week) got my wings for powered flight (Telemaster
40).  I had received my wings for my glider about three month ago and it had
no ailerons.  Ailerons allow you to execute faster and better controlled
turns.  The problem now is when I land I forget to use my left hand to
steer the plane on the ground and I usually roll off the side of the
runway. That is if I land on it:-).  I don't think you will have any
problems switching to ailerons, I enjoy using them.


-- 
Shane McCarthy                  Please forward mail to
Windsor, Ont.                   cs.uwindsor.ca!jabba!peeker!shane
From: sbixby@cup.portal.com (Steven W Bixby)
Newsgroups: rec.models.rc
Subject: Re: AM vs FM AGAIN? - Have Mercy
Date: Fri, 14 Aug 92 10:02:32 PDT
Organization: The Portal System (TM)
Distribution: usa

< story 'bout Airtronics FM stuff deleted >

>Well, Futaba also sells a micro system, but it is AM.  So now the big
>question.....
>
>IS AM SO MUCH WORSE THAN FM THAT I SHOULD WAIT TWO AT LEAST TWO MONTHS
>FOR THE FM SYSTEM?
>
>I know AM has more of a problem with noise, etc, but has anybody read,
>heard, seen anything that would convince me to wait for FM or go with
>the AM?

I have heard the rumors also - but I can quote from basic experience that
I don't believe AM is going to work any less well than FM.  Supposedly AM
is more susceptible to outside frequency interference, such as pager repeaters
or whatnot.  

I have two of the Futaba AM systems - one 4NBL with micro rx & servos, and
one 4NBL-E with combination rx & ESC (speed control for electrics) as well
as micro servos there too.  I also have JR X-347 PCM, Futaba 7-UAP PCM,
Futaba 7-FGK FM and Airtronics FM - and I fly in a quite radio-congested
area - the SF Bay Area.  I have NEVER had any trouble with the AM radios,
after many hours of using them.  I haven't had trouble with the others, either.

If AM was a problem, you can bet the bottom dollar that Futaba would not
sell them in the quantities they do - no one wants a bad reputation, much
less a huge corporation with such a following of customers that Futaba is/has.

Finally, my preferences for radio systems is such that I will ALWAYS look to
Futaba first.  (My JR-X347, which I LOVE, was from a trade, and the Airtronics
was from buying back a botched gift project).  So, I don't think you have
a thing to worry about buying the Futaba AM systems - go for it.

  -swb-  (Steve Bixby - sbixby@cup.portal.com)
Newsgroups: rec.models.rc
From: jlw@world.std.com (James L Walker)
Subject: Re: Quickie 500 Needs to be REFORMED!!
Organization: The World Public Access UNIX, Brookline, MA
Distribution: na
Date: Fri, 14 Aug 1992 12:08:49 GMT

In article <22866@hacgate.SCG.HAC.COM> lew@4ccvw16.UUCP (Lyman Lew) writes:
>In article <ericw.713649487@hobbes> ericw@hobbes.amd.com (Eric Wedaa) writes:
>>lew@4ccvt2.scg.hac.com (Lyman Lew) writes:
>>
>>
>>1-4 are NOT good ideas!
>>
>
>I disagree, I believe they are very good ideas. They are the most
>effective that's why I listed them first. Currently the rules state
>that the contest directors rules whether an airplane is safe to
>race or not. There is nothing empirical and nothing analytical to
>determine if the airplane will stand the stress and strain of all
>out racing, but just the discretion of the contest director. 
>
>In Control Line, an airplane is pull tested to see if any part of
>the control system will break. In Control Line speed, the airplane
>must fly in an enclosed fence. There are also specifications spelled
>out in the AMA rule book on how line ends should be made and type
>of restraints should be implemented on handles. These examples given 
>are designed to protect the public and the contestants from any 
>possible mishaps.
>

If your stress test for Q500 is standardized however, you are forcing 
all participants to build strong enough planes to stand an engine
they might not be flying.  I just fly for fun, so I don't know but I 
suspect that the extra weight of making the airframe strong enough might
force competitors to go to the more powerful engine just to compete.
One thing is for sure though, if the CD rules whether a plane is safe
to fly then it should reflect very badly on that CD when the plane
breaks apart.

How about a wrist strap. :-)

-- Les Walker
From: steven@syacus.acus.oz.au (Steven Malikoff)
Subject: Re: Very low thrust motors?
Organization: ACUS Australian Centre for Unisys Software, Sydney
Date: Tue, 18 Aug 1992 23:59:19 GMT

sorgatz@avatar.tti.com (sorgatz) writes:
: In article <BsqA1q.24y@usenet.ucs.indiana.edu> ntaib@silver.ucs.indiana.edu (Iskandar Taib) writes:
: >At one time there used to be something called Jetex motors,
< ps-the infamous 'Jetex wick' burns as fast as I remember it..just a hair under
< MACH 1, unless you use less than 3" of the stuff..then it burns at WARP 8!!

Yes, the fuses were something like match-head compound over a fine wire, and
they always seemed to go out when entering the casing. Years ago, I read that
it was possible to shape the charge by cutting a few grooves down the side of
it. This allowed more surface area to burn at once, giving a shorter duration
but *heaps* more thrust- so much so that the casing was in danger of bursting.
   I tried this trick on my japanese 'Tiger' motor (Jetex clone, circa 1978)
but couldn't really tell whether it helped or not.

Steve Malikoff.
steven@syacus.acus.oz.au
Newsgroups: rec.models.rc