Ed_Wischmeyer
Well Known Member
Since I've got digital flight data recording in the RV-9A, from time to time I use that system to record performance data. The current project is measuring stall speed vs bank angle.
The first two measurements were taken on today's flight, right after each other, in level flight. Flight parameters were flaps up, 11" manifold pressure, 3700 MSL, pretty close to standard day. The last measurement was taken a few months ago under pretty much the same conditions.
Here's what I recorded for stall speed vs bank angle. Yes, it's a little embarrassing that I didn't have my bank angles more precise, but here's what I recorded for stall speeds:
7? bank 64 KIAS
24? bank 60 KIAS
80? bank 55 KIAS
Obviously, I'm messing with y'all, but it shouldn't be too hard to figure out what I did. First prize is a used oil filter, second prize is two used oil filters...
The point of this exercise is, of course, to refute the misunderstanding that bank angle and stall speed are directly related to each other. There's a few key details that need to be included to make that statement valid...
The first two measurements were taken on today's flight, right after each other, in level flight. Flight parameters were flaps up, 11" manifold pressure, 3700 MSL, pretty close to standard day. The last measurement was taken a few months ago under pretty much the same conditions.
Here's what I recorded for stall speed vs bank angle. Yes, it's a little embarrassing that I didn't have my bank angles more precise, but here's what I recorded for stall speeds:
7? bank 64 KIAS
24? bank 60 KIAS
80? bank 55 KIAS
Obviously, I'm messing with y'all, but it shouldn't be too hard to figure out what I did. First prize is a used oil filter, second prize is two used oil filters...
The point of this exercise is, of course, to refute the misunderstanding that bank angle and stall speed are directly related to each other. There's a few key details that need to be included to make that statement valid...