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<DIV><FONT face=Arial size=2>Bob</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have the GPS unit - haven't worked with it much
as they don't work through a CF fuse and the early one was large (gross
taped to the outside). The Eagle Tree folks are great and swapped out the big
unit for the current smaller unit - I just haven't taken the time to try it. Not
only is it good for mapping ground speed, but distance out and track relative to
the flight line is easily available.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>These units are great - while the "feel" and
presentation of what we do is the bottom line, data can help make good decisions
regarding equipment and settings more quickly. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Earl</FONT></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=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</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 3:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] APC 18.1
x 10W props</DIV>
<DIV><BR></DIV>
<DIV>Earl,</DIV>
<DIV> </DIV>
<DIV>I see they also have a GPS option. It would be real interesting to
compute velocity relative to the ground. This would be a good indication of
how to alter throttle management in wind situations.</DIV>
<DIV> </DIV>
<DIV>Now I know "track" is the only thing that should be judged, but a
constant velocity makes it easier to present good geometry to the judges.
JMHO.</DIV>
<DIV> </DIV>
<DIV>Bob R.</DIV>
<DIV><BR><BR><B><I>Earl Haury <ehaury@houston.rr.com></I></B>
wrote:</DIV>
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<DIV><FONT face=Arial size=2>Bob</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I've used the datalogger as you describe for
prop evaluations. The data will provide some surprises. I also gather data
throughout a pattern sequence then note those data (airspeed / altitude)
onto an Aresti of the pattern - very useful in fine tuning geometry /
throttle use / braking. Move the thing to the top of your wish
list!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Earl</FONT></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=bob@toprudder.com href="mailto:bob@toprudder.com">Bob
Richards</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
10:26 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] APC
18.1 x 10W props</DIV>
<DIV><BR></DIV>
<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:
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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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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<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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