RE: Smallest gas engine
I still have one of the RCS 1.40 22cc gassers. It produces a lot more power then my old Zenoah 26cc ever did. Great engine except for the rear inducted carb. Talk about not being thought out!! No mater what you do to mount this engine except setting it way forward, the nedles are always directly under [inside] the fire wall.
The 17 is a side mounted carb so that can be a big help! The price is under half the price I paid for the 1.40 too. Maybe the China thing has something to do with that??
Ken, if you get one let us know what you think. Other then carb adjustments I love the 1.40.