pierre smith
Well Known Member
Gary. my -10 will glide 400 FPM better with the prop control pulled all the way back...900 FPM vs 500 FPM. It really is amazing how much drag is reduced.
Best,
Best,
Gary,
During glide testing with my HR2 I experimented with both fine and full coarse pitch settings for glide. The glide numbers differ greatly between the two, the coarse pitch being nearly identical to my FP numbers on the RVX. However comma, they could be misleading as when most CS props lose oil pressure during engine failure, the hub springs push them to fine pitch. Therefore figure worst case with a CS prop post engine failure unless the WW can go to coarse pitch with no oil pressure.
V/R
Smokey
www.fly-4-life.com
IIRC the Hartzell goes to fine pitch and MT CS prop to coarse pitch. If there is no oil pressure the engine might be seized and drag of a stopped prop is much less. I have no figures for RV's.
Gary,
During glide testing with my HR2 I experimented with both fine and full coarse pitch settings for glide. The glide numbers differ greatly between the two, the coarse pitch being nearly identical to my FP numbers on the RVX. However comma, they could be misleading as when most CS props lose oil pressure during engine failure, the hub springs push them to fine pitch. Therefore figure worst case with a CS prop post engine failure unless the WW can go to coarse pitch with no oil pressure.
V/R
Smokey
www.fly-4-life.com