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<DIV>Bill,</DIV>
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<DIV>Nothing scientific or deliberate enough to quantify a result/change in efficiency.</DIV>
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<DIV>The flywheel effect - that is not too difficult to notice on smaller engines (at idle) when running with / without spinners.</DIV>
<DIV> </DIV>
<DIV>Dave</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>Dave:<BR>Out of curiosity, (I know you ae a tireless experimenter) have you ever seen anything qualitative that you could pin on spinner size? You are, of course, exactly correct with your statement below. Also, there might ba a small flywheel effect which would increase with spinner weight, but I sure would hate to call it anything but theoretical<BR>Bill Glaze.<BR><BR><A class=moz-txt-link-abbreviated href="mailto:DaveL322@comcast.net">DaveL322@comcast.net</A> wrote:
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<DIV>The hub area of a prop is typically pretty inefficient (it is difficult to get enough pitch in the prop) so the large spinner helps streamline the center of the prop and reduce drag.</DIV>
<DIV><BR>Dave</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">-------------- Original message -------------- <BR><BR>> Other than appearance, is there any advantage of a big spinner over a <BR>> smaller one? <BR>> <BR>> John Ferrell <BR>> <A class=moz-txt-link-freetext href="http://dixienc.us/">http://DixieNC.US</A> <BR>> <BR>> ----- Original Message ----- <BR>> From: "Dean Pappas" <D.PAPPAS @kodeos.com=""><BR>> To: <DISCUSSION @nsrca.org=""><BR>> Sent: Sunday, March 13, 2005 5:25 PM <BR>> Subject: RE: Spinner poll <BR>> <BR>> <BR>> > Hi Jason, <BR>> > I drew the new ship at 3-3/8 and wished I'd gone up to 3-1/2. <BR>> > At least then I could have used a heavy plastic CB products spinner! <BR>> > Let me guess, you are making recommendations for an updated airplane? <BR>> > As I look at E-power, I am contemplating a flow thru spinner, rather than <BR>> > an annular opening, a la the old Cutlass Supreme. <BR>> > <BR>> > Later, <BR>&g! t; > Dean <BR>> <BR>> <BR>> ================================================= <BR>> To access the email archives for this list, go to <BR>> <A class=moz-txt-link-freetext href="http://lists.f3a.us/pipermail/nsrca-discussion/">http://lists.f3a.us/pipermail/nsrca-discussion/</A> <BR>> To be removed from this list, go to <A class=moz-txt-link-freetext href="http://www.nsrca.org/discussionA.htm">http://www.nsrca.org/discussionA.htm</A> <BR>> and follow the instructions. <BR>> </DISCUSSION></D.PAPPAS></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></body></html>