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<DIV><FONT face=Arial size=2>That's true, it's just a feel thing. I agree with
Mike's assessment.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm using the 18.1x10 regular and Jim Ivey is using
the 18.1x10w clipped. They both work really well. Mine tachs right around 8100,
Jim's is really close to that number as well.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The differences in the 2 as I can see, just an
impression: The 18.1x10 that I'm using has a really wide speed envelope. Good
slow down lines but it will turn into a rocket at full power. It does load the
engine down a bit, but I'm running it a little rich.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The 18.1x10W clipped that Jim is using has really
good down lines, good top end, but at cruise speed it's turning more RPMs. As a
result, he doesn't have to move the stick too much transitioning from level to
an upline. it has pretty good flat torque.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'd say it this way: If your style is slower, try
the clipped 10W. if you like to move along a little faster during normal flight,
use the regular 10. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>That's just my impressions right now. Note that I
haven't tested these props on really hot, humid days, so I can't say for certain
if it's too much load or not. Yet.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>-Mike</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>PS it's also important to note that these props are
too big for a normal TT 3" 120 cut spinner. Close, but you have to open up the
cut outs slightly. At least I had to....</FONT></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=mups1953@yahoo.com href="mailto:mups1953@yahoo.com">mike mueller</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 1:04
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] APC 18.1
x 10W props</DIV>
<DIV><BR></DIV> In my case its just a touchy feely thing. I tend to base
most things on it. Mike<BR><BR><B><I>Bob Richards <<A
href="mailto:bob@toprudder.com">bob@toprudder.com</A>></I></B> wrote:
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<DIV>I'm curious about how one comes up with the best prop selection. In my
case, it has always been a very subjective thing to determine the in-flight
performance.</DIV>
<DIV> </DIV>
<DIV>Has anyone used any of the dataloggers to measure airspeed on
up/down/level lines? IMHO, that would be one way to remove some of the
subjectivity of in-flight performance. I think one of my christmas wish-list
items is the Eagle Tree system.</DIV>
<DIV> </DIV>
<DIV>Bob R.</DIV>
<DIV><BR><BR><B><I>mike mueller <mups1953@yahoo.com></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> From
my experience this is the best prop I have tried to date. I have mine on a
YS160/Genesis. I was using Biela 3 bladed props,APC 4 bladed props
and the 18x10.1 regular APC and this gives the best performance so far.
Mike Mueller <BR><BR><B><I>"Dr. Mike Harrison"
<drmikedds@sbcglobal.net></I></B> wrote:
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
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<DIV><FONT face=Arial size=2>Peter,</FONT></DIV>
<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2>I am Mike Harrison, I worked with APC to
develop these props. Let me tell you the goal of the prop
design. It is to fly at a moderate to slow constant speed under
the noise limit but with good pulling performance. Therefore,
regarding the rpm, the 8000 is about ideal for that prop, turn it much
more and you will be above the noise limit. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I find it interesting that you determine
whether a prop is adequate by first tacking it. I would think you
would fly it first to see if it was adequate. I would encourage
you to do that first. The OS 140 turns it about the same and it
flies very well. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The whole purpose was to develop a prop
that would fly at a deliberate pace at about 150 meters to compete with
the electrics. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>There is also an 18.5x9.5 which I fly and
it turns about 7500 rpm. I like it better than the 18.1x10.
I am working on a 19x9 at the moment.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Good luck</FONT></DIV>
<DIV><FONT face=Arial size=2>Mike</FONT></DIV>
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<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=pentagon.systems@bigpond.com
href="mailto:pentagon.systems@bigpond.com">Peter Pennisi</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> Tuesday, November 14, 2006
5:48 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] APC
18.1 x 10W props</DIV>
<DIV><FONT face=Arial size=2></FONT><BR></DIV>
<DIV class=Section1>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU style="FONT-SIZE: 10pt">I recently purchased some 18.1 x
10W APC props for my DZ160. Apparently there appears to be another
version 18.1 x 10.1.<o:p></o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU style="FONT-SIZE: 10pt">Could someone please tell me the
difference between both?<o:p></o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU style="FONT-SIZE: 10pt">I tried a quick ground run on this
prop (stock) this morning but could barely get 8000 RPM from the
engine. I will take advice from a member on this list and lop 1/4inch
of each blade. What RPM readings are people getting who are using
either of these props on a YS DZ160
engine?<o:p></o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU
style="FONT-SIZE: 10pt">Regards,<o:p></o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></DIV>
<DIV class=MsoPlainText><FONT face="Courier New" size=2><SPAN
lang=EN-AU style="FONT-SIZE: 10pt">Peter
<o:p></o:p></SPAN></FONT></DIV></DIV>
<DIV>
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