ORIGINAL: Skinny Bob

Gaines, I have a 25cc gasser in my GP Super Stearman and GP P6-E Hawk. The engine length was ok. Width was a different story, a little tight. The Stearman weighs 15+lbs, the 25 flys it ok, but a little mushy on take off. The P6-E is less, 12-1/2lbs. the 25 flys her fine. The 1/5 YMF is about the same size as the Stearman, if you can keep the weight down to 12+lbs. the 25 will probably do ok, however I think I would recommend a 40cc. Both my 25's are Brillelli engines, great engines and great support from Scott. I think the 25 would do very well in a 1/6 size YMF, the cowl is quite round and roomy and might accept the 25.