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<DIV><SPAN class=850190806-20022006><FONT color=#0000ff size=3>Well, I believe
there are rules requiring some form of a spinner. But a spinner nut seems like a
solution, especially for the outrunners.</FONT></SPAN></DIV>
<DIV> </DIV>
<P><FONT
size=2>Regards,<BR>Jason<BR>www.jasonshulman.com<BR>www.shulmanaviation.com<BR>www.composite-arf.com</FONT>
</P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of </B>Keith
Black<BR><B>Sent:</B> Monday, February 20, 2006 12:58 AM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] Electric TT
Spinner<BR><BR></FONT></DIV>
<DIV>My question is, other than looks, what is the purpose of a spinner an
electric pattern plane?</DIV>
<DIV> </DIV>
<DIV>- Reducing drag isn't a concern as recent designs are being built to be
more draggy.</DIV>
<DIV>- Starters aren't used with electrics so having a nose cone isn't
necessary for starting.</DIV>
<DIV> </DIV>
<DIV>The only thing I can think of is to clean the air flow and reduce
turbulence from the blunt nose so air going around the fuse and over the wings
is smoother, however, with the prop chewing the air so close to the nose of
the plane I'm not sure this is significant.</DIV>
<DIV> </DIV>
<DIV>Opinions?</DIV>
<DIV> </DIV>
<DIV>Keith Black</DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=amad2terry@juno.com href="mailto:amad2terry@juno.com">Terry
Terrenoire</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, February 19, 2006 7:22
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion]
Electric TT Spinner</DIV>
<DIV><BR></DIV><FONT id=role_document face=Arial color=#000000 size=2>
<DIV>I am adapting a 30 year old design to a pattern electric. This plane
was designed around the Veco .19. I think I am going to use the E-Flite 450.
Total weight looks to be in the 32 oz range. I just started drawing the
motor cowl. What I am going to try to do is use a very small spinner,
possibly 1 1/4, but make the ring behind the spinner backplate 2" to 2 1/2"
diameter. That will allow air to enter the motor compartment from around the
spinner. Another option I have been considering is 2 cheek scoops!</DIV>
<DIV> </DIV>
<DIV>Terry T.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>On Sun, 19 Feb 2006 19:48:52 EST <A
href="mailto:Rcmaster199@aol.com">Rcmaster199@aol.com</A> writes:</DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 10px; MARGIN-LEFT: 10px; BORDER-LEFT: #000000 2px solid">
<DIV>
<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>
<DIV> </DIV>
<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>
<DIV></DIV>
<DIV> </DIV></FONT>
<DIV> </DIV></BLOCKQUOTE>
<P>
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