<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Chuck I think the underpropping of the engine is only part of the answer. It sounds from your description that the low end is lean. You might try both, more prop and a richer idle. A 16x13, 16.5x13, or 17x10-12N would be good choices for the 120. And since it also slows on that upline, try lengthening the pipe some.<BR>
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MattK<BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:<B>Cub to X-15 </B><BR>
Date:5/12/2004 8:02:37 PM Eastern Daylight Time<BR>
From:<A HREF="mailto:cshochhalter@sbcglobal.net">cshochhalter@sbcglobal.net</A><BR>
Reply-to:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
To:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SERIF" FACE="Times New Roman" LANG="0"><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">That’s right, my swallow has changed its landing habits considerably and now I too find myself somewhat frustrated as Paul Horan was or still is.</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SERIF" FACE="Times New Roman" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">OS 120 pumped running a 16X8 Master Airscrew ran great, idled great without a big change once warmed up and flew well with the exception to extended 45 deg. uplines would slow after a while.</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">So, I decided to try a 15X10 apc prop just for grins… and the story goes… much better overall flight performance with regards to speed, smoother speed transitions but now it lands like a rocket and I can’t get her to slow down. Idles fine, fly the sequence and then 6 clicks of down trim to get to idle again, then still have to really draw a downwind leg to hit the front half of the runway.</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0"> </FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">So… my guess is to spend another 30 bucks in props to find a better match:</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0"> 16X8 APC, 16x10 APC, 15X10 MasterAirscrew</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Lets hear it guys!!!</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Thanks in Advance,</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0"> </FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000080" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Chuck Hochhalter</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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