hello i am from German sorry for my english:
can the FZ 80 turn larger props at the 14 x7 i think to 16" the YS are wonderfull Engines but the RPM over 10000 ist not praktikable for Slower flying scale airbatic modells.
These RPM are good for warbird racing and high speed flying models.
I want to use these Engine for an similar Modell as airraptor but an prop with more diameter looks and works better on these scale planes.