[NSRCA-discussion] Electric TT Spinner

[Rcmaster199 at aol.com]

It's no big deal to make cutouts in the spinner cone. Just requires  more 
cereful balance. I've attempted it before on smaller spinners but  wasn't happy 
with the results (on wet set-ups, and both cooling air flow wise  and strength 
wise)
 
Theory sounds good but in practice, don't expect much air flow to  penetrate 
into the spinner when the motor is running at higher power  output. The ribs 
that would be needed to still make the spinner functional,  would likely block 
off air flow. Turbulence that could result, would likely rob  power.
 
BUT, one way it could work fairly well would be to actually refashion  or 
bend the ribs in such a shape that air is literaly drawn in and forced  through 
the spinner. Like a set of impeller vanes. The pitch of the vanes  wouldn't 
need to be very high. It would rob some power from the motor though, so  the 
practicality could be questionable. 
 
On the other hand, an optimal pitch angle probably exists and could be  
found, that robs the minimum power and provides the maximum cooling air flow  
through the spinner. 
 
Matt
 
In a message dated 2/19/2006 7:28:01 PM Eastern Standard Time,  
jshulman at cfl.rr.com writes:

I didn't  know they were doing that. Thought they just cut out for the props
and have  the lightened back  plate.

Regards,
Jason
www.jasonshulman.com
www.shulmanaviation.com
www.composite-arf.com

-----Original  Message-----
From:  nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On  Behalf Of Pat Hewitt
Sent: Sunday, February 19, 2006 7:18 PM
To:  patternrules at earthlink.net; NSRCA Mailing List; NSRCA Mailing List
Subject:  Re: [NSRCA-discussion] Electric TT Spinner


Please  advise,

What are some of your thoughts on the cut outs of a True Turn  Spinner for
cooling on an Electric Pattern Plane not the back plate but the  cone itself.

Pat h.




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