[williame3590]

Does anyone make a small gas twin in the 30cc range?

thanks Bill

[OTTERTOK]

I've never come across any yet.

[kiwipaul]

There is no such thing as a small gas twin. A fellow member is building a Ziroli B25 Mitchell with 2, 30cc gas motors. It could swallow my 2meter x 2meter pattern plane.
kiwipaul

[wingburner]

I think he's looking for a 30cc twin engine.

I don't know of any on the market nor have I ever seen a production gas twin that size..

[Guest]

This is the smallest one I've seen @ 50CC in a twin
http://www.hobbycity.com/hobbycity/s...ine_CDI_3.13kW

[DO335]

Originally Posted by williame3590

Does anyone make a small gas twin in the 30cc range?

thanks Bill

Webra makes one to run on glow:

http://www.webra-austria.at/motor.ph...r=AERO&lang=EN

Perhaps that could be converted to gasoline?

I believe that you'd be below that break even point where the graphs cross to go gas as opposed to glow. Weight versus power output would probably be the critical relationship favouring the glow.

Even then, the results would probably favour a single cylinder engine over a twin. For instance, I once had a .30 cu.in. twin cylinder glow engine - a G-Mark 30 twin. It ran great but is was about as heavy as a .60 cu.in. single cylinder glow engine and put out about as much power as a .15 cu.in. single cylinder glow engine.

[valhalla]

Originally Posted by DO335

Webra makes one to run on glow:

http://www.webra-austria.at/motor.ph...r=AERO&lang=EN

Perhaps that could be converted to gasoline?

I believe that you'd be below that break even point where the graphs cross to go gas as opposed to glow. Weight versus power output would probably be the critical relationship favouring the glow.

Even then, the results would probably favour a single cylinder engine over a twin. For instance, I once had a .30 cu.in. twin cylinder glow engine - a G-Mark 30 twin. It ran great but is was about as heavy as a .60 cu.in. single cylinder glow engine and put out about as much power as a .15 cu.in. single cylinder glow engine.

That is a good point. A good example was with the 70's Honda 350cc twin vs the Honda 350cc 4 cylinder. The twin was actually more powerful due to much less internal drag and mechanical HP loss, the 4 cylinder was a bit smoother of course

[williame3590]

I was sure there wasn't but the way things are changing you just never know.
I new about the 50cc but that's too big for my application.
Pacific Areomodels 1/4 scale clipped wing Monocoupe 90, I'll have to go with one of my twin glow's. Just wanted a really nice sound on this one and 30cc would be max power needed. These things weight nothing.
Thanks for the help

Bill

[SpaceCowboy]

Tartan Engines from Italy made some small twins.

The smallest I could find on line was a 44cc twin .

I could not find their web site. The one link I found was no good.

Good luck.

[Wayne V]

The smallest one i seen was a twin 28cc converted Echo 14cc's that a guy bought of e-bay http://www.rcuniverse.com/forum/m_7387179/tm.htm