bristol

Whats the smallest gas engine available. I'm looking for something less than 1 ci.

Thanks

MajorTomski

As far as an Internal Cumbustion gas engine Cox used to produce a 0.005 cuin engine. That was in essence 1/10 the volume of a standard 0.049/0.051 glow engine.

Brown and Gasparin both produce CO2 cold gas engines of even less displacement.

HTH
Majortomski

dirtybird

My Feedback: (5)

I assume you mean an ignition engine.
I don't think there is a production ignition engine available less than 1 cu in.
You can convert an engine to ignition with an aftermarket ignition. Check with C&H or Nelson products.

bdtsr

My Feedback: (5)

Check the auctions here for a Maloney 100 (1.0ci). Though suited more for high wing and lightly loaded airplanes, it may just be what you need.

Ric

My Feedback: (4)

There's an Italian company, Compagnucci, that make one that is about the size of a .40ci.
http://www.compagnucci.it/uk/frame_uk.htm
Originally made for r/c cars, they have boat and aero versions. MECOA in Calif. sells these cars, but has yet to stock the aero version (maybe if more pressure was put on them, they'd hop to it). They aren't cheap (assuming you could get one), around $400.00!
I'd love to see one of these in action, and see how the performance/weight and reliability is.

bristol

Thanks guys. I do mean ignition engines on gasoline or coleman fuel. I do have a cox .010. It is a miracle how it works. I'll try to get the italian job or the Maloney. Thanks again and Happy New Year to all.

Diablo-RCU

My Feedback: (1)

Avoid the Maloney unless you want to put the engine in a display case. Most don't run and it's not worth the cost of repair to get them running.

dirtybird

My Feedback: (5)

Come to think of it there are a number of replica engines made by RJL that are spark ignition. I had a Forester .99 that had two speed points on it. I don't know if they make the .29.
They make a Blue Streak that I understand was an Orwik 64 made under license. Orwik specifically cautioned against using anything but 70 wt oil. According to Orwik that eliminated the glow plug for use in his engine.

Hobbsy

My Feedback: (102)

Actually, the Maloneys run very well, you just have to use a starter, also look for a Merco .61, I got mine from Carlson Engine Imports.

bdtsr

My Feedback: (5)

Yes Hobbsy is correct, the Maloney engine run quite well and are reliable, I know I have a 1.00 and a 1.25. Yes there are a few tricks but nothing that should turn someone away! They can also be fitted with an electronic ignition system as well.

Antique

My Feedback: (4)

If ya just gotta have a small gasser, a Saito 40 four stroke turns a Master Airscrew 11-6 at 9000 rpm...Just did one....the carb gets really touchy running gas, mixed 10 oz Amsoil 50-1 with one gallon 87 octane gas....the ignition and battery weighs about 6 or 7 ounces, spark plugs are $12.95 ,not really practical...

flipflop

A long time ago I flew my Telemaster 40 one whole summer with a Fox 45 running on C-H ignition using the stock carb. Yes, the needles were a bit touchy and I could feel the extra weight on the plane. The coolest thing about that whole project was that it sounded just like a baby Briggs&Stratton.

bristol

I appreciate the info. May not be practical for everyday use but maybe it will be for my specific purpose. Anyways, I need a new project. I have way to many planes in my stable so I am looking for something to keep me ocuppied for a longer time than just building one. I don't crash often enough to thin my stable. Not that I am a great pilot, its just difficult to crash when you fly a mile high all the time.

bristol

Today I received an e-mail from Mecoa advising me that I was put on a waiting list for the .40 2 stroke italian gas ignition engine. Anyone wishing for one should e-mail Mecoa.

GoldenEagle

My Feedback: (1)

RCIGN1: Just curious; what would it take to convert a Saito 180 to gas and what could I expect in power, reliable operation, and longivity? I read about Maynard Hill's transAtlantic flight using a gasoline fueled O.S. 4-stroke - that's dependablity!

Antique

My Feedback: (4)

I haven't cnnverted a Saito 180, but there should be a little less power but no difference in reliability or longevity...C&H has all the right stuff to convert one, call Bill or Terry at
ch-ignitions.com

bristol

On thing to have in mind when converting a glow to gas is the percentage of oil used. Typically, people would use the same percentage (32:1, 40:1 or 50:1) as in gassers. This I hear is incorrect since these glow engines do not have needle bearings in the con rod like most gassers. The correct percentage should be close to what the engine would use in glow. This of course would affect the efficiency of the conversion. Can someone correct me if I'm wrong?

Antique

My Feedback: (4)

The percent of oil in the fuel has very little effect on performance...Glow engines run 18 -20 percent oil..No one questions the efficiency of a 5+ horsepower Jett glow engine...
The same oil percentage used in the glow fuel must be used with gasoline...I think the .40 small gasser has a needle bearing big end ion the con rod...The OPS 30 glow engine has a needle bearing con rod also...There was an OS about 20 years ago that had a needle bearing con rod, I think it was somewhere around .8 cubic inch..