O.S. max .77 questions
Hi There!
I have used the 77 OS Max on various airframes. We used to race the 'larger planes.' The best header is nade by MAC. There are 2 configurations... fuse top andstraight. The straight is the least constricting. I used to get 25000-26000 in the air with 20% fuel with an 11-8 narrow. I imagine you could go to 10-9 or others... must make sure its apc and that the hub is substantial so the blades don't separate. I lost an engine doing this when a prop broke in flight and the bearings partially dis-assembled! We clocked the ship by radar over 170mph. A nice theoretical formula (NO Drag & 100% efficiency) is
speed(mph)=((Pitch in inches)*RPM)/1056
unfortunately, drag and slippage ranges from 15-20%
if you know any 2 of the pitch, rpm or desired speed, you can calculate the rest
randy