Gary
Thanks a lot for sharing this info.
--Don
From: Indoor_Construction_at_yahoogroups.com
[mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of Warthodson_at_aol.com
Sent: Saturday, March 18, 2006 2:18 PM
To: Indoor_Construction_at_yahoogroups.com
Subject: Re: [Indoor_Construction] A-6 design variables
* Don,
I have had the best results from stabs of 50% to 42%. I have tried larger
stabs up to 70%. They seemed to work well at lower torque levels, but I
couldn't
get them trimmed to handle the high torque levels required at Johnson City &
Kibbie dome. Maybe the tail booms were too floppy or too long, but I never
pursued it further. My CG is approx. 1.25" behind the wing trailing edge. My
tail
booms range from 8.5" to 9.5" long. Within these ranges I have not been able
to measure any difference. It sounds like you need a better motor/prop
combination. What were the specifications of your motor & prop?
Even with repeated 1/4 motor tests, I find it difficult to measure
differences between two models because each wind of the motor produces
different results
on the same model. For example, I have tried to winding a quarter motor to
80% of max winds & each flight produces a different time on the same plane.
Going from memory, the variation is 5 to 10 seconds. that is 20 to 40
seconds on a
full motor. I have also tried winding to the same torque each time with
similar results. This variation masks any difference between two similar
models
with only slight design differences. I would love to hear how others try to
sort
out the differences between two designs.
To add one more thought. I have used Bernie Hunts program to simulate &
compare designs. It has pointed me in the right direction, but at some point
I
cannot duplicate the results it suggests.
Gary Hodson
[Non-text portions of this message have been removed]
Received on Sun Mar 19 2006 - 16:36:09 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET