RE: Have You Flown With 4-Blade Prop?
I've flown the TF GS P47 with DA 85 swinging Fuchs 21x11 4 blade prop.
Engine was a bit too much for this prop, but otherwise looked scale.
You should be ok with that 55cc in a small warbird like the Hangar 9.
I would not recommend running 4 blade prop with that DLE55 in a GS warbird.