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#1
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On Wednesday, April 29, 2020 at 5:07:37 PM UTC-7, Ron Gleason wrote:
On Wednesday, 29 April 2020 17:29:52 UTC-6, wrote: I'm curious why motorglider pilots don't practice that at 200ft agl, as all student pilots do on aerotows as part of normal training. FYI- the L/D of the Arcus M with mast extended and engine not running is approximately 13:1 with a sink rate in level flight of 495 fpm. Do you want to try a turn back to the runway with those numbers? Come on Mark, 1980 vintage hang glider performance. Not an issue, could probably do a 360! As one who has flown many vintage 1980 hang gliders, 13:1 was a dream that we could never achieve! 5 or 6:1 was more typical. 8:1 for the very high end. The math is, a 50:1 glider at 1000 lbs has 20 lbs of drag. The dynamic pressure of 50 knots is about 8.5 lbs/ft^2. To get to 13:1 you need to add 57 lbs of drag or about 6.7 sq ft of flat plate area. A spinning 5 foot prop is 20 sq ft, not flat plate but pretty high drag coefficient. So it is plausible. On an ASH26 with a stopped prop at 20:1, it's just like landing a clean 2-33 or 1-26. Students do it all the time. |
#2
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On Wednesday, April 29, 2020 at 5:15:43 PM UTC-4, wrote:
On Wednesday, April 29, 2020 at 1:03:12 PM UTC-7, waremark wrote: - climb for 200' or so, then set throttle to idle, and do a 180 degree turn, lining up on the that road - repeat the test, but this time, turn the ignition off, then turn as before" I'm curious why motorglider pilots don't practice that at 200ft agl Because we prefer not to die. |
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