Remember you have still got to add a header & pipe, as well as the ignition battery to the "3lB" you calculated for engine weight.
Then the C.G will also be a problem on a plane designed for glow.

The Fantasy is not going to make it under 11lb with a gasser, its too heavy, (based on what other people have said about its weight).

If you mean the Fantasy A.A machine, rather than the Eclipse, then yes wing loading is critical to the 3D performance.

I think gassers can be made to work, but with the gas engines currently available, they will not work in a design intended for glow power. (not without significant modification anyway)

As for the soft mounts, the nose ring should be the only problem, the basic pricple of the Hyde mount should still apply, shouldn't it?

There was an interesting article on gas engines for pattern, By Gerry Dale, in the May edition of RCModeler.

The cover has his gas powered smaragd., while his article details the construction of his own design, called the L'Essence 2, for gas power. He used the RCS 180, though at that weight, I don't see why you wouldn't choose the ZDZ40 re.


Does anyone know of any pipes available for gassers?
I see the K&S pipes on the DA site but $$$$$$$$$$, and I guess with 40cc in an 11lb plane, you don't really need a "tuned" pipe, only a light weight, noise suppressing pipe, without reducing rpm too much.