HDTenEightyP/NetNews huggingface dataset:
From: larrie@beaufort.sfu.ca (Larrie Simon Carr)
Subject: Controlling Glow Plugs
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Tue, 7 Apr 1992 20:51:12 GMT


I am looking a building a little glow plug power box
(12V to 2V and 1.5V converter) for my brother.  I looked
at an old version which had three resistors in it.  It 
doesnt work well as the 2.0V tends to fry the plug in a 
few seconds.

The big question is what is more important?  Should the
current through the glow plug be controlled, or the voltage?
Both cases are easy to implement with a MOSFET and a 
variable resistor.

-- 
Larrie Carr                 
Engineering Science               (604) 291-4451  
Simon Fraser University           (604) 298-1050
British Columbia, Canada          larrie@sfu.ca
Newsgroups: rec.models.rc
From: ed@kronos.com (Ed Baker)
Subject: Re: Controlling Glow Plugs
Date: Tue, 14 Apr 1992 05:42:33 GMT
Distribution: na
Organization: Kronos Inc. / Waltham, MA
Disclaimer: This posting is a personal opinion and not that of Kronos Inc.

Would someone please post a circuit diagram that will perform this function?

---
High Flyers - Crotty landed in the pit and broke his prop.
            - He's on two weeks probation.
            - He's also on two months double secret probation.
Newsgroups: rec.models.rc
From: mccoy@nevada.edu (MARY MCCOY)
Subject: Re: 2 stroke vs. 4 stroke engines
Organization: University of Nevada System Computing Services
Distribution: rec.models.rc
Date: Thu, 9 Apr 1992 16:55:16 GMT

In article <1992Apr8.144724.18563@rtsg.mot.com> svoboda@rtsg.mot.com (David Svoboda) writes:
>In article <1992Apr2.174959.20657@pictel.com> santo@pictel.com (Santo Wiryaman) writes:
>|
Santo Wiryaman:
>|4-stroke
>|--------
>| - Operates with larger prop at lower RPM which gives a pleasant
>|   (scale) putt..putt..putt sound.
Dave Svoboda: 
>Or, in another opinion, has an unpleasant lawnmower sort of sound.  Not
>really scale sounding at all.
>
>Before anyone flames (in rec.models.rc?  Who am I kidding? :-), that is
>just my humble opinion.  Personal taste.  Unpopular personal taste.

Me:
In my **humble opinion** and **strictly personal taste**, 4-stroke
engines are too expensive and too fussy for general sport use. I
will admit, however, that there are a few planes that gotta have
them. There are 2 kinds of people that will argue with me about this:
(1) people that are richer than I am or, at least, have more money
free to spend on this hobby and (2) people who derive their main
enjoyment from trying all day to get their engines to run properly.
Many of my friends have 4-strokes, my own brother even has 2. I
believe that I get more flying in, with less bother, than they do.

Admittedly, there are fliers who can't get their 2-strokes to run right,
either. There are also fellows who try and try but can't learn to
fly their Eagle 2. We all know guys like that.

But, as regards engines, I think you get more bang for the buck with
a 2-stroke.

Duncan McCoy
Boulder City, NV


Newsgroups: rec.models.rc
From: jlw@world.std.com (James L Walker)
Subject: Re: 2 stroke vs. 4 stroke engines
Organization: The World Public Access UNIX, Brookline, MA
Date: Thu, 9 Apr 1992 19:09:52 GMT

In article <1992Apr08.135439.9597@bmerh2.bnr.ca> petera@bcrka398.bnr.ca (Peter Ashwood-Smith 1600361) writes:
...
>  In general, the larger engines seem to be easier to start and run more
>reliably than the smaller ones ... my impression anyway. I'm not sure how
>good the smaller 4 strokes are? Anyone out there got say an OS 40 4 stroke?
>
>   Peter.

Like probably a zillion other RCers I fly a 4*40 with an O.S. 48
4-Cycle.  My impressions are about the same.  It starts up real easy
and never runs backwards.  I don't even own a power starter.

The thing that I am most impressed with is the smooth, reliable idle
and the quick transition back to full power.  My two cycles were often
finicky about the needle valves being adjusted just right.  This
engine never goes deadstick on me.

-- Les Walker
From: abel@vax.sonoma.edu (dan abel)
Newsgroups: rec.models.rc
Subject: rank beginner?
Date: 10 Apr 92 20:03:27 GMT
Organization: Sonoma State University

I'm not even a novice in RC yet.  My sole experience is with a couple 
of US$20 cars from Radio Shack I bought for the kids for Christmas.  
It looks real interesting, but the investment is putting me off.  
Does anyone have any advice about buying a Dumas lil swamp boat with 
an .049 Cox and a cheap radio for getting started with?  I've heard a 
lot of stories, both here (I've been reading for a few weeks) and 
elsewhere about planes crashing, so I'd like to keep it to two 
dimensions at first.  One question: what do you do when the engine 
dies in the middle of the water?  I'm not a good swimmer and don't 
have a full-size boat.
From: john@kennel.FIDONET.ORG (John Hamilton)
Newsgroups: rec.models.rc
Subject: April's Specials
Date: 10 Apr 92 06:22:35 GMT
Organization: Fido's Kennel, Cupertino CA

Airtronics radios, good prices. Examples:
 
Infinity 600A 
   w/ standard 102 servos (4) in FM-PPM mode, $359.99
   w/ standard 102 servos (4) in FM-PCM mode, $379.99
   both come in any of the following frequencies: 72, 50, 53
 
Vision VS8SP (the sailplane option radio of choice):
   w/ standard 102 servos (4) in PCM mode only, $521.99
   same frequencies.
 
other Airtronics radios equally well priced.
 
Futaba radios all on special this month, netmail for price quotes.
 
Cars: Losi Pro-SE : $169.99
      AE Team car (aluminum) : $162.99
      Corally SP12 Graphite : $199.99
      Corally SP10 Graphite (road course) : $199.99
      Corally SP10 SS Graphite : $229.99
Trucks: Losi LXT : $179.99
 
Planes, boats, helis: soon soon, will have dealer accounts at
major distributor soon. Wish it was happening sooner.
 
Terms: Shipping and handling $5.00 in US for a car kit or equivalent
bulk/weight (including truck kits and radios). Payment by prepayment
(checks must clear, money orders treated like cash) or COD CASH with
a $3.75 COD fee. MasterCard/VISA maybe in 2-3 weeks, if bank approves
the application (startup businesses are hard to qualify for this, so
it might not happen this year).
 
We are beginning to assemble ideas for a catalog. Don't count on it
anytime soon, publishing costs are something we don't need to incur
at the moment, trying to break even and stay alive and still give
deep discounts.
 
Thanks again to all who have made inquiries, and especially those
who have placed orders - you are helping to make continuing special
pricing for netters possible!
 
John Hamilton
Owner
Hamilton Hobbies
1010 Morse Ave. #14
Sunnyvale, CA 94089
(408) 744-1969

--  
John Hamilton                  uucp: uts.amdahl.com!kennel!john
DoD #0327   ToT #11            internet: john@f8.n143.z1.fidonet.org
ZX-11 From Hell.               arpa: john@kennel.FIDONET.ORG
She said, "Its either me or that ZX-11!" Too bad, I'll miss her.
From: bek@calmasd.prime.com
Newsgroups: rec.models.rc
Subject: Team SLC mailing list
Date: 13 Apr 92 19:37:04 GMT
Organization: Computervision - A Division of Prime Computer

I represent Team SLC, a new company located in Lake Zurich, Illinois.
Team SLC matches and sells nicad batterys and builds a line of modified
and stock motors for RC applictions.

If you live in Southern California and are interested in being on
Team SLC's mailing list mail your name and address to:

Bryon Kromray
9805 Scranton Road
San Diego, CA 92131

or phone me at 619-587-3169
Organization: Carnegie Mellon, Pittsburgh, PA
Newsgroups: rec.models.rc
Date: Mon, 13 Apr 1992 01:49:33 -0400 
From: Massimo Bigliardo <mb7r+@andrew.cmu.edu>
Subject: Mac Flight Simulator

Does anyone know if there exist any flight simulator program for Mac?
Thanks
Massimo
Newsgroups: rec.models.rc
From: petero@cs.rice.edu (Peter Ostrin)
Subject: Austin clubs and fields
Organization: Rice University, Houston
Date: Wed, 8 Apr 1992 16:00:51 GMT

Hi,

I am thinking of taking a job offer in Austin, TX.  I fell in love
with RC planes and gliders about 8 months back.  Can anyone out
there tell me a bit about flieds in the Austin area. I would love
to do slope soaring and find myself becoming more and more into gliding
as the time goes on.  But, I have two 40 size planes that are lots of
fun.

Any info about clubs (cost, location, facilities) would be appreciated.

Thanks for your time.

Peter Ostrin

petero@cs.rice.edu
From: orban@ciit85.ciit.nrc.ca
Newsgroups: rec.models.rc
Subject: Mac glider design sw at sumex
Date: 13 Apr 92 03:07:02 GMT
Organization: National Research Council

There is a glider design program for the mac at the sumex-aim.stanford.edu 
ftp site. The program can be found in the info-mac/app directory. 
The enclosed info is attached.

Peter Orban                     | Internet: orban@ciit85.ciit.nrc.ca
                                | Bitnet:   orban@nrccit.nrc.ca
**********************************************************************


This is the first release version of Glider Design (v1.0).  The copyright
(1992)
of Glider Design belongs to the Michigan Space Grant Consortium.  This program
is free -- this means no one is given the permission to charge any amount of
money
for this program.  Nor is anybody allowed to distribute this with non-free
software.
If you paid money for something and recieved this program, please let me know
who charge you.  This file is to be kept with the Glider Design! package at all
times.


This program is being distributed just for your enjoyment.  Docs are not
written
yet, so don't ask for them (but you can ask for advice).  This program is a
Computer
Aided Design program which allows you to design balsa wood gliders, then prints
plans up for them.  When the program starts up, it looks for a file called
DEFAULT DATA
in the same folder as the program.  This file contains information about the
balsa wood
to be used to build the gliders.  There is an option under the File menu to
create new
DATA files.  I highly recomend that a new DATA file is created when ever you 
buy new wood.  You can purchase wood at almost any hobby shop.  I recomend you
buy 1/8" X 4" X 48" sheets of balsa wood for the wings and 3/16" X 1/2" X 48"
sticks
of spruce for the fuselage -- but you can get what ever is avialable.  Notice
that 
Glider Design! works in centimeters only!  Future upgrades will make the units
switchable, but no dice for now.

The program will not let you do some "stupid" things in you design of the
glider.
If you want to do something in the design, and the program won't let you, it is
probably because what you want to do is stupid.

Once you have finished with a design, select Compute Forces from the Calculate
menu.  This will tell you if your glider will fly or not, and if not, then why
not and
how to fix it.

Please, please, please try out and e-mail any bugs to my internet address.

Thank you,

Michael F. Kamprath
kamprath@caen.engin.umich.edu (valid until December 1993)
From: hhg9751@tamsun.tamu.edu (Herb Graeber)
Newsgroups: rec.models.rc
Subject: O.S. FT-120 assistance
Date: 10 Apr 92 14:49:25 GMT
Organization: Texas A&M University, College Station

Hello - I am new to the net.  Just acquired a O.S. FT-120 2
cylinder 4 stroke with less than an hour on it.  Planning on
putting it on a 1/4 scale SIG J-3 Cub.  Problem is that I
don't have the manual for the engine.  Does someone have a
manual they would be willing to copy and I could reimburse them
...or...could someone advise max rpm for this 4 stroke, 
suggested prop size and if 10% fuel is OK or should I use 15%.
You can e-mail to the following address.  Many thanks for
talking the time to assist.
-- 

 Herb Graeber K5HG, Senior Systems Analyst, Microcomputer Support
 Texas A&M University, College Station, TX 77843  (409) 845-9999
 hhg9751@tamsun.tamu.edu     profs: x043hg@tamvm1.tamu.edu
Newsgroups: rec.models.rc
From: as660@cleveland.Freenet.Edu (Steve Rasmussen)
Subject: 1991 1/8th Gas Car World Champ'ship Video???
Reply-To: as660@cleveland.Freenet.Edu (Steve Rasmussen)
Organization: Case Western Reserve University, Cleveland, OH (USA)
Date: Fri, 17 Apr 92 05:20:26 GMT


 
RC Car Action mentioned (4-5 issued back)such a video was in production
but they never followed up on it. Anyone know where I can purchase the
video?
      --thanks, Steve.
From: howie@intermec.com (Howard Kaplan x1696)
Newsgroups: rec.models.rc
Subject: Re: T/R mixing for switchless inve
Date: 9 Apr 92 17:25:25 GMT
Reply-To: howie@intermec.com (Howard Kaplan x1696)
Organization: Intermec Corporation, Everett WA

Mike,

Thanks for the follow up on the tail mix. I have been trying to get mail
directly to you with no success. Please mail me a note so I can get the path
to you.

I have set my machine up like you suggested with throttle to tail mix. Will
try it out once we get some decent weather.

Howard Kaplan
From: rogue@hill.gnu.ai.mit.edu (The Mystic)
Newsgroups: rec.models.rc
Subject: Bought new car.
Date: 8 Apr 92 23:32:59 GMT
Organization: Parthix Development Corp <> Project Vortex

For any that are interested, I just bought a new RC-10 graphite team.
Any thoughts on it?  Or the MIP 4WD coversion kit for 4x4?

Can anyone suggest a good quality 2 channel radio?  I would like to do
something better than AM, PCM is too expensive, so FM sounds about right.
What FM frequencies are available for ground based tx's?  I am a lover of
two-sticks.  I find the pistol type controller too annoying to deal with,
so any suggestions should probably by based on a two stick.  Thanks!  
 
Have a good one.
 
--rogue (Ben Grubin)
--


[-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-]
Ben Grubin - KA1UEB          The opinions stated above are my own.  Period.
The Free Software Foundation - Project GNU   Email: rogue@gnu.ai.mit.edu
Member of the League for Programming Freedom-Contact league@prep.ai.mit.edu!
[-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-][-=*=-]
From: mmcevill@mitre.org (Michael A. McEvilley)
Newsgroups: rec.models.rc
Subject: Re: Two engine questions on airplanes and copters
Date: 31 Mar 92 18:50:51 GMT
Distribution: usa
Organization: The MITRE Corporation

I have been flying OS .61 ABC SF and RF Pumpers for 2+ years.  And I have 
never had any problem starting, adjusting, or maintaining my engines.  I 
use Mach-7 (same people that make Omega; Morgan's Fuels)  Castor/Synthetic 
blend, 10 - 12.5 % for non-piped installations, and 15% with a pipe.  I 
break all my engines in using the advice of Clarence Lee, from RCM 
magazine.  Basically, he says to break your ABC engine in IN THE PLANE 
(not on a bench).  Adjust it to run rich, and FLY!   The best way to break 
it in is to fly maneuvers that alternately load and unload the engine 
(e.g. cuban-8's or loops if you are not comfortable with cuban-8's).  As 
you get approximately 10, 10 minute flights on the engine, slowly lean it 
out each additional flight until you get your target RPM.  

Michael A. McEvilley
mmcevill@mitre.org
Newsgroups: rec.models.rc,uw.forsale,pnw.forsale
From: basiji@milton.u.washington.edu (David Basiji)
Subject: Electric radio controlled powered glider for sale
Reply-To: basiji@u.washington.edu
Organization: University of Washington, Seattle
Distribution: pnw
Date: Tue, 14 Apr 1992 17:11:45 GMT


For Sale:
	"Electra" powered glider with motor, battery pack (3 spare cells),
	12V battery charger, 4 channel "1991 approved" Airtronics FM radio
	with three servos, lotsa random stuff you need to fly.
	The plane is in decent shape but the wings have been broken down for
	transport.  This is a good rig for beginners and intermediates.
	I originally paid over $350 for it.  Asking $175 or best offer.

	Dave
	basiji@u.washington.edu
	527-9172
From: miked@syscon.rn.com (Mike DeMetz)
Newsgroups: rec.models.rc
Subject: Re: Beginner wants to learn about RC helicopters
Date: 8 Apr 92 14:16:55 GMT
Organization: Syscon International - Corporate Headquarters

ez001099@hamlet.ucdavis.edu ('Louie Louie') writes:

>Hi Everyone!

>I've never flown anything by rc before but I would like to
>get my own rc helicopter eventually (and hopefully soon).
>I realize that helicopter flying is very difficult.  I
>already know about the flight principles of real choppers
>and I learn fast.

It takes practice like a lot of things but is not as hard as
some would make you believe. Modern r/c choppers are a lot better
than those of 10 years ago.

>Does anyone have any comments or advice for me on this
>subject?  Can someone suggest a particular chopper for
>me?  Perhaps someone knows of a certain controller or engine
>that works well for helicopters.
Best chopper for beginners right now is probably the Kyosho Concept SE
or Shuttle ZX. Which depends on what your local fliers/hobby shop
supports. Most brand name engines are OK like OS,Webra,Enya.
 Getting help setting it up is the most important thing
you can do. You may want to check into some of the heli simulators
for computers.

>My plastic model of the Apache looks good but can't do
>much.  I'd like to fly one sometime.  (Maybe I will build
>an rc helicopter into a miniture gunship.  But then again,
>maybe not.)
Scale bodies are availible for r/c choppers as well as multi-blade
heads but you will have to wait before trying either.

>Thanks for any thought you might have on the subject.
Check your hobby shop for Rotory Modeler magazine and Ray's Helicopter
Manual.
>Louie
>ez001099@hamlet.ucdavis.edu



?????????????????????????????????????????????????????????????????????????????
! Mike DeMetz                                          -----|-----          !
! Secretary-Michiana R/C Choppers                   *>=====[_]L)            !
!                                                         -'-`-             !
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
From: moskowit@tronsbox.xei.com (Len Moskowitz)
Newsgroups: rec.models.rc
Subject: Alternatives to Epoxy?
Keywords: non-toxic, quick-setting
Date: 10 Apr 92 15:01:23 GMT
Organization: Xanadu Enterprises Inc.

I may have developed a skin sensitivity to epoxy so I'm looking for a
good alternative.  The adhesive has to be able to fill large cavities,
set quickly, be non-toxic, not cure by evaporation, not shrink
appreciably, be widely available and relatively cheap.  One of the
alternatives that I know of are the acrylic adhesives but they are not
commonly available.  Polyesters work well but the catalyst is
incredibly toxic.  Cyanoacrylates like Super-T and Zap-A-Gap don't
fill large cavities well.  Contact cements like Weldwood shrink too
much and take too long to cure.

Anyone have suggestions?

-- 


Len Moskowitz
moskowit@tronsbox.xei.com
From: ichong@us.oracle.com (Ivan Chong)
Newsgroups: rec.models.rc
Subject: Airtronix Infinity Radio
Date: 17 Apr 92 17:52:38 GMT


A friend of mine is thinking of buying an Airtronix Infinity
Computer Radio.  His interests lie primarily with RC gliders -
slope soarers & sail planes.  Recently, he's been flying mostly
his slope soarer (Ridge Runt) and is modifying his Spectra to
have ailerons.  Now he wants a new radio so he can do more interesting
things with his ailerons.

His final decision for getting the Airtronix Infinity depends
on whether he can do the following two things with this radio:

  1) Use his two aileron servos to set up aileron differentials

  *AND*

  2) Use the ailerons as spoilerons


Does anyone know if it is possible to accomplish these two things
using the Infinity?  If so, how is this done?  Any other comments
on the Infinity?

Thanks in advance!

Ivan Chong
ichong@oracle.com
From: Robert Lesser
Newsgroups: rec.models.rc
Subject: Good Magazines?
Date: 14 Apr 92 15:38:04 GMT
Reply-To: urhlre@uncvx1.oit.unc.edu
Organization: UNC-CH Academic Computing Services

Hi,
   I am considering subscribing to a magazine on RC aircraft.  I am
interested in opinions as to the qualities of the different magazines.

Bob Lesser
urhlre@uncvx1.oit.unc.edu 
Newsgroups: rec.models.rc
From: "david w. braun" <sl292013@silver.ucs.indiana.edu>
Subject: Heli rotor rpm vs blade types
Organization: Indiana University
Distribution: usa
Date: Thu, 9 Apr 1992 21:06:30 -0500


To anyone who can answer my question, 

1) How much roto speed does one need, to make symmetrical, semi-symmetrical and
   non symetrical blades preform properly ?

2) How does one og about painting the fuselage of a heli. I saw many custom 
   paint jobs done at the concept 30 challange in ILL.


>>>> just post something in news group <<<<<<

							dragon.....
Newsgroups: rec.models.rc
From: barber@ad.enet.dec.com (ANDREW BARBER)
Subject: Re: Controlling Glow Plugs
Reply-To: barber@ad.enet.dec.com (ANDREW BARBER)
Organization: Digital Equipment Corporation
Date: Thu, 16 Apr 92 20:08:45 GMT


How about a shunt voltage regualtor using a zener diode.  Get a zener with about a 1.5v rating and construct this circuit.  (the diode would have to have a very high current rating)


	--------------/\/\/\/\---------------------
	|				 |	  |
	|				 |	glow
     -------			       ____/	 plug
       ___ 12v			      / /\	  |
	|			       /  \	  |
	|			      /    \	  |
	|   			      ------	  |
	|________________________________|________|

Now that I think about (after drawing it of course), this wouldn't be very practical.  I don't think you can get a diode to conduct enough current.  But the idea is that when the glow plug changes resistance (higher for instance) the diode will pick up the excess current to keep the current thru the resistor somewhat constant and thus the voltage accross the glowplug.
Another idea is to use an indepenent current source by using a BJT current mirror (such as the Wildar current source).  The current can be controlled by a variable resistor.
NPN TRANSISTORS

	______ 12v			_______ 12v
	   |				   |
	   |				glow plug
	   \				   |
	   /				   |
	   \  variable resistor		   |
	   /				   |
	   |				   |
	 C |----|			 C |
	   |	|			   |
	    \	|	  B		  /    This device should be much
	     \| |			|/     larger than the other.
	      |-------------------------|	(I_s should be much larger)
	     /|				|\
	    /				  \
	 E | 				   |  E
	   |				   |
	   ---------------------------------    ground

The current seen in the first transistor (which is independant of the glowplug load) is replicated in the other transistor by a factor of (I_s).

/ajb
From: danm@watson.ibm.com (Dan McCabe)
Newsgroups: rec.models.rc
Subject: Futaba servo and trainer cable interface specifications
Date: 15 Apr 92 15:18:54 GMT
Reply-To: danm@grumpy.watson.ibm.com (Dan McCabe)
Organization: IBM TJ Watson Research
Disclaimer: This posting represents the poster's views, not necessarily those of IBM

Does anyone have a description of the interfaces to Futaba radios?
Specifically,
I want to know what signals the servos get. I also want to know what
gets passed over the trainer cord.

Thanks in advance,
danm
From: ultra10@vax1.mankato.msus.edu
Newsgroups: rec.models.rc
Subject: Pulse Jet Engine
Date: 9 Apr 92 23:30:12 GMT
Article-I.D.: vax1.1992Apr9.173014.1694
Organization: Mankato State University

There is an add I see all the time in RCM for the plans to a pulse jet engine
you can build out of an aerosol can. JET ENGINE TECHNOLOGIES in Tx, sells the 
plans.

I am wondering if anyone has bought the plans and tried to make the engine ?
If so - Did it work? What kind of thrust did you get? Could you throttle down
to near zero thrust without the flame going out?
Is it easy to build ?

-Rob
Newsgroups: rec.models.rc