ORIGINAL: skylarkmk1

Bill,

I will defer to you on the power for the model but have to disagree on the full size power. From what I can find the original 1934-35 U/YMFs left the factory with either the Continental R-670 210 hp engine, 225hp W-670-K, 220hp W-670-6 (UMFs) or the Jacobs L-4 MB 225 hp engine (YMFs). The Waco Classic YMFs have Jacobs’s engines from 275 hp to 300 hp from the factory.