Jeff wrote; "When every one talks about flare, I'm assuming that it
comes primarily from the spar twisting to an increased pitch, not
from the blades".
Yes, you're right about the prop spar.
If you are trying to get the maximum time out of your model in a 20'
ceiling, 1.5 minutes to the ceiling wouldn't be out of line for a
smooth ceiling site. If you use a prop with too much pitch or
flare, the models time in the ceiling will be limited, and the motor
won't have enough torque to use up the turns.
Your latest times with your EZB, show that you are headed it the
right direction. Don't worry about using a heavier piece of rubber.
You mentioned that your 17:09 flight had 240 turns left using a loop
of .038X9". You could decrease the prop's pitch slightly or increase
the rubber cross section to .040X9" to use up a lot of those
remaining turns. Try both, but the wider cross section should take
care of the number of turns left.
On your 17 minute flight, did you wind to 1500 turns and a torque
of .07, or did you wind past 1500 and back off turns to .07? The
reason that I'm asking, I could get 1800 turns out of a loop of
8/93. - .041x9.5", according to some flight records from 1994.
Except for F1Ds, I don't push my motors, and have maximum torque
limits for each class that I fly. I would wind a .040 motor from .2-
.25 inch ounces, and then back off.
Larry Coslick
Received on Sat Dec 10 2005 - 04:58:00 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET