<br><font size=2 face="sans-serif">Good God almighty! Mike Harrison on
the list! Can Art Wagner be far behind?</font>
<br><font size=2 face="sans-serif"><br>
<br>
<br>
Gray Fowler<br>
Senior Principal Chemical Engineer<br>
Radome and Composites Engineering<br>
Raytheon</font>
<br>
<br><font size=2><tt>nsrca-discussion-bounces@lists.nsrca.org 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 mailing list<br>
> NSRCA-discussion@lists.nsrca.org<br>
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</tt></font>