ORIGINAL: G-Pete
NO
I fly a 50cc in a KMP 71" FW190 - still needed nose weight. Better more motor than dead weight.
You will be fine!
Does that mean I could put a 50cc in a 73" ESM109 and be ok Pete??
edit: seriously, My dad has a 86" P-51, the 73" 109 is closest in actual scale than anything available Iam aware of.. The plane handles a DLE 30cc just fine but Iwonder about the speed and power differences..