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<DIV><FONT face=Arial size=2>Yeah, Yeah, Yeah.......</FONT></DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=gfowler@raytheon.com href="mailto:gfowler@raytheon.com">Gray E
Fowler</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 Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, November 15, 2006 2:49
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] APC 18.1
x 10W props</DIV>
<DIV><BR></DIV><BR><FONT face=sans-serif size=2>Good God almighty! Mike
Harrison on the list! Can Art Wagner be far behind?</FONT> <BR><FONT
face=sans-serif size=2><BR><BR><BR>Gray Fowler<BR>Senior Principal Chemical
Engineer<BR>Radome and Composites Engineering<BR>Raytheon</FONT> <BR><BR><FONT
size=2><TT><A
href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</A>
wrote on 11/15/2006 02:41:42 PM:<BR><BR>> Thanks George!</TT></FONT>
<BR><FONT size=2><TT>> ----- Original Message ----- </TT></FONT><BR><FONT
size=2><TT>> From: george w. kennie </TT></FONT><BR><FONT size=2><TT>>
To: NSRCA Mailing List </TT></FONT><BR><FONT size=2><TT>> Sent: Wednesday,
November 15, 2006 12:03 PM</TT></FONT> <BR><FONT size=2><TT>> Subject: Re:
[NSRCA-discussion] APC 18.1 x 10W props</TT></FONT> <BR><FONT size=2><TT>>
<BR>> Welcome to the list Mike!!!!!</TT></FONT> <BR><FONT size=2><TT>>
----- Original Message ----- </TT></FONT><BR><FONT size=2><TT>> From: Dr.
Mike Harrison </TT></FONT><BR><FONT size=2><TT>> To: NSRCA Mailing List
</TT></FONT><BR><FONT size=2><TT>> Sent: Wednesday, November 15, 2006 8:31
AM</TT></FONT> <BR><FONT size=2><TT>> Subject: Re: [NSRCA-discussion] APC
18.1 x 10W props</TT></FONT> <BR><FONT size=2><TT>> <BR>>
Peter,</TT></FONT> <BR><FONT size=2><TT>> Hi,</TT></FONT> <BR><FONT
size=2><TT>> I am Mike Harrison, I worked with APC to develop these props.
Let <BR>> me tell you the goal of the prop design. It is to fly
at a moderate<BR>> to slow constant speed under the noise limit but with
good pulling <BR>> performance. Therefore, regarding the rpm, the
8000 is about ideal <BR>> for that prop, turn it much more and you will be
above the noise limit. </TT></FONT> <BR><FONT size=2><TT>>
</TT></FONT> <BR><FONT size=2><TT>> I find it interesting that you
determine whether a prop is adequate <BR>> by first tacking it. I
would think you would fly it first to see if<BR>> it was adequate. I
would encourage you to do that first. The OS <BR>> 140 turns it about
the same and it flies very well. </TT></FONT><BR><FONT size=2><TT>>
</TT></FONT> <BR><FONT size=2><TT>> The whole purpose was to develop
a prop that would fly at a <BR>> deliberate pace at about 150 meters to
compete with the electrics. </TT></FONT> <BR><FONT size=2><TT>>
</TT></FONT> <BR><FONT size=2><TT>> There is also an 18.5x9.5 which I
fly and it turns about 7500 rpm. <BR>> I like it better than the
18.1x10. I am working on a 19x9 at the moment.</TT></FONT> <BR><FONT
size=2><TT>> </TT></FONT> <BR><FONT size=2><TT>> Good
luck</TT></FONT> <BR><FONT size=2><TT>> Mike</TT></FONT> <BR><FONT
size=2><TT>> From: Peter Pennisi </TT></FONT><BR><FONT size=2><TT>> To:
'NSRCA Mailing List' </TT></FONT><BR><FONT size=2><TT>> Sent: Tuesday,
November 14, 2006 5:48 PM</TT></FONT> <BR><FONT size=2><TT>> Subject:
[NSRCA-discussion] APC 18.1 x 10W props</TT></FONT> <BR><FONT size=2><TT>>
<BR>> </TT></FONT> <BR><FONT size=2><TT>> I recently purchased
some 18.1 x 10W APC props for my DZ160. <BR>> Apparently there appears to
be another version 18.1 x 10.1.</TT></FONT> <BR><FONT size=2><TT>>
</TT></FONT> <BR><FONT size=2><TT>> Could someone please tell me the
difference between both?</TT></FONT> <BR><FONT size=2><TT>>
</TT></FONT> <BR><FONT size=2><TT>> I tried a quick ground run on
this prop (stock) this morning but <BR>> could barely get 8000 RPM from the
engine. I will take advice from a<BR>> member on this list and lop 1/4inch
of each blade. What RPM readings<BR>> are people getting who are using
either of these props on a YS DZ160 engine?</TT></FONT> <BR><FONT
size=2><TT>> </TT></FONT> <BR><FONT size=2><TT>>
</TT></FONT> <BR><FONT size=2><TT>> Regards,</TT></FONT> <BR><FONT
size=2><TT>> </TT></FONT> <BR><FONT size=2><TT>> Peter
</TT></FONT><BR><FONT size=2><TT>> <BR>>
_______________________________________________<BR>> NSRCA-discussion
mailing list<BR>> NSRCA-discussion@lists.nsrca.org<BR>>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</TT></FONT> <BR><FONT
size=2><TT>> <BR>>
_______________________________________________<BR>> NSRCA-discussion
mailing list<BR>> NSRCA-discussion@lists.nsrca.org<BR>>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</TT></FONT> <BR><FONT
size=2><TT>> <BR>>
_______________________________________________<BR>> NSRCA-discussion
mailing list<BR>> NSRCA-discussion@lists.nsrca.org<BR>>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>>
_______________________________________________<BR>> NSRCA-discussion
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http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</TT></FONT>
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