ORIGINAL: w8ye
Sounds pretty good to me
But one .20 engine will have more power and be more efficient than two .09's
Except he's talking Cox Tee Dee 09's which are really gutsy engines
The pull/push system works on full size planes so I guess it'll work fine with models. My only reservation is on the rear engine with its plain bearing where the thrust is pushing backwards on the crankshaft.