Re: Approaching the new rules from a design standpoint

From: <mkirda_at_sbcglobal.net>
Date: 17 Apr 2014 10:57:50 -0700

Hi Kang.

 I see a model with a reasonable amount of wing wash, far less than the up to 1.5" that I have seen previously on a few of my old motor sticks (all 0.013") at high torque (uo to 0.6 in-oz.)
 It is about what I want to aim for, honestly.
 

 On one built for West Baden (the crunched one) I had done a spiral wrap with Kevlar thread. This didn't cut the wing wash as much as I would have thought it would. Kevlar may be the wrong material. Carbon or boron under tension should be better. I've never gotten boron to wrap around an entire 1/4" motor stick though - it always fractures. 5/16" doesn't have this problem. On my first F1ds flown at JC, I used tungsten wire to spiral wrap and it made an unflyable model flyable. Tungsten might be the best solution.
 

 I feel like being able to trim to use that 0.5 to 0.35 range is the next leap for me.
 Using 0.015" wood looks like it will solve this issue.
 

 Regards.
 Mike Kirda
 


Received on Thu Apr 17 2014 - 10:57:50 CEST