I have a 1977 Cessna R172 Hawk XP.
The P.O.H. only shows stall speeds for 10 & 40 degrees of flaps. Note the speeds are not linear ( for 0 deg. bank )
so I can not interpolate. Can someone tell me where to find stall speeds for 20 & 30 degrees of flaps?
Thanks
Here's what I would have done: At safe altitude, do a stall at 10 and 40 degrees, and see by how much % they deviate from what the POH says. Then do the same with 20 and 30 degrees flaps, and just work it backwards by the same %. At least it should give a good approximate value.
