JasonRP

I was just talking about the early '80s Model Airplane News construction artical on the Bebe Jodel- C02 powered. I also remember seeing a C02 engine at a hobby shop when I was there with my dad- I was maybe 8 or so, so I don't remember much about it, other than it was very small.

Anyone here remember more than me about these motors? How much did they weigh, and how long did they run on a "tank" of fuel? How did they work, and who made them? Were they only good for freeflight? Or did anyone RC them?

Thanks,
Jason

flyinrog

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Hey Jason, I was gonna get a co2 plane off the bay once, so I brought it here and asked about it and most everyone said it would be too weak to RC and it would only run for about a minute...Rog

rainedave

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Ok, don't laugh too loud. I actually made an R/C C02 model a few months ago. It's basically the Model Aviation BDF, which was an update of the Old Timer Halfpint design with the fuse rotated 45 degrees.

I built it with ailerons and elevator using two FMA S70 Submicro servos and a Tetra rx with a 110 mah pack. I haven't even flown it yet, but the wing loading is respectable for the design. The aileron servo - which has been removed - was mounted in the fuse and connected to the ailerons with two tiny vertical pushrods (think bipe linkages).

And yes, the G-Mot 300 motor LOVES that antique 10x2 Tornado presswood C/L prop. It absolutely puts out enough thrust and runs long enough to get up to a hundred fifty feet or more. Catch a thermal and it could OOS!

BuzzBomber

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Now THAT is cool. You need to fly that thing and take video!

vicman

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Do you just use the BB gun cartriges?

Dave, as the CC ambasador you and I need to meet one day for a noon meal or late one. FYI

Vic

rainedave

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Thanks BuzzBommber. It's been sitting on top of my PC tower and I practically forgot about it until this thread, even though I look at it a dozen times a day. I just got a GWS Pico 4ch rx that would be even better than the old FMS Tettra. Man, those GWS rx's are tiny! When I bought the Tettra six years ago I thought it was small.

JasonRP, the best supplier I know of for things C02 is Roy Hanson of The Black Sheep Squadron: http://blacksheepsquadron.com/
As far as I know he is the sole importer of Gasparins and also carries the G-Mot line which are cheaper.

I bought an R/C throttle linkage from him for the 300 in the pics. Here's the info: http://blacksheepsquadron.com/thrott...ckringthrottle That's right, throttled C02.

You can buy different size tanks for different motor runs and it's best to get the paintball gun tank adapter since the little seltzer C02 cartridges won't fill the larger tanks.

If you think diesels can turn large props, you have to check out C02 engines. I'll tach the 10x2 tomorrow, but I can tell you it will just about pull that model out of my hand when I run it.

Give Mr. Hanson a call, but give yourself a good half hour. He's enthusiastic and loves to talk C02.

MJD

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I have a CO2 converted Cox .049, and it will turn a 12-8 prop! Torque city. CO2 is a riot. My smallest is a Gasparin G6 (not their smallest) and I flew it indoors on an 8" span Cleveland Viking knockoff, does about a minute. The GM300 is a brute too.

MJD

gcb

The only CO2 I have is an ancient OK. It used a seltzer type cartridge, but I don't have the adapter.

It works by having a BB seal at the top of the cylinder that is pushed up by a pin on top of the piston. It will only work upright.

The cylinder fins are actually for supplying heat so the cylinder won't freeze. There is a hole in the crankcase to add lubricating oil as needed.

George

rainedave

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George, there are - as I'm sure you know - a great number of classic old plans designed around those OK C02s.

Otto Kuhni does C02 repair work. He might be able to put a new filler valve on it for you.

Otto Kuhni
13253 Valleyheart Drive
Sherman Oaks, CA 91423

Phone at home
Evenings BEFORE 9pm
818-788-4282

indoorff

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How did you convert it? Any plans?