RE: CMP F4U Corsair 50 Build Log
I'm very happy with the 91 FS Surpass II (pump model), very reliable and fits the Corsair perfectly using a 14x7 2-blade prop. On Corsair #1 I used the .55 AX which was OK but needed a lot of lead in the cowl to balance (and the high pitch noise of course). The .91 is heavier, and on Corsair #2 i have moved the engine further forward (140mm firewall to prop backplate) so no lead.
The pump FS is very reliable, my favourite maneuvre is a vertical climb up to stall point, stall turn, left aileron roll going down then snap and go into flat spin (kind of blender I guess). I usually pull out of this a couple of mistakes high for fear of a dead engine, but good old 91 has never quit on me
I also like the gradual response of the throttle, as it avoids extreme torque effect (e.g. on an aborted landing)
Altogether a good combination