Agreed, these engines can not compete with their two-stroke counterparts for power and probably throttle response. But neither did first generation open rocker Saito or OS four stroke motors compete with 2-stroke glow engines. The open rockers were masterpieces of engineering and are still very popular for some types of models.

The four stroke petrols do look and sound absolutely great and produce sufficient power for some types of aircraft - mostly WW1 or pre-WW1 types. Imagine a 100 - 120 inch wingspan Etriche Taube floating in the sky wth an exposed four stroke gasser puffng away on a calm evening. Can you tell that I quite like the four stroke petrols?

I was won over after listening to a converted Briggs 34cc on another RCU thread (Balsa USA Fokker DVII w/4stroke gasser). To the extent that I've just imported three converted engines from the US - a Fuji 35cc, a Honda GX25 and a Briggs Fource currently being converted by Brilleli. And I am only just learning to fly!

Can't wait to get one of them on a large trainer and go learning- now that will be cool.


Maninder S.