My sense is the answer to your question is undefined. An aeronautical engineer might be able to give you a theoritical figure but...
Pattern pilots use the ESC brake function for slowing the aircraft.
Originally Posted by
JerMilosek
I've read that a prop spinning at a low rpm creates more drag than one that's free wheeling.
My question is at what rpm is the greatest drag created?
This comes about because I want to slow down the aircraft more and sooner during a landing.
E-power has the luxury to preset the "idle" rpm anywhere from 0 to 2000 rpm, where in that
range will I get the greatest drag/thrust ratio? I haven't gotten into fixed end points and braking
yet but looking at the logged data from my Castle ESC, I can see a long spool down. Its in the
10-12 second range from the time I hit low throttle until the rpm as reported by the ESC bottoms
out at around 450 rpm. Its under no wind, a long gentle glide with the rpm around 2100 when
low throttle is applied and its using an outrunner.
Thanks, J e r
MHRCS member
50th consecutive Rhinebeck Jamboree Sept. 9-11
http://mhrcs.com/pages/Jamboree.htm