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<DIV>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)</DIV>
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<DIV>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.</DIV>
<DIV> </DIV>
<DIV>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. </DIV>
<DIV> </DIV>
<DIV>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. </DIV>
<DIV> </DIV>
<DIV>Matt</DIV>
<DIV> </DIV>
<DIV>In a message dated 2/19/2006 7:28:01 PM Eastern Standard Time,
jshulman@cfl.rr.com writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>I didn't
know they were doing that. Thought they just cut out for the props<BR>and have
the lightened back
plate.<BR><BR>Regards,<BR>Jason<BR>www.jasonshulman.com<BR>www.shulmanaviation.com<BR>www.composite-arf.com<BR><BR>-----Original
Message-----<BR>From:
nsrca-discussion-bounces@lists.nsrca.org<BR>[mailto:nsrca-discussion-bounces@lists.nsrca.org]On
Behalf Of Pat Hewitt<BR>Sent: Sunday, February 19, 2006 7:18 PM<BR>To:
patternrules@earthlink.net; NSRCA Mailing List; NSRCA Mailing List<BR>Subject:
Re: [NSRCA-discussion] Electric TT Spinner<BR><BR><BR>Please
advise,<BR><BR>What are some of your thoughts on the cut outs of a True Turn
Spinner for<BR>cooling on an Electric Pattern Plane not the back plate but the
cone itself.<BR><BR>Pat h.<BR></FONT></BLOCKQUOTE></DIV>
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