<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Paul keep in mind that some folks run 90 2 strokes on moderately sized planes similar to yours. The 120 should be extra insurance and you don't have to fly it at full throttle. The extra ponies will allow some additional play time with other props for speed and noise suppression<BR>
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Good Luck<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>Re: TT Pro 1.20 Question </B><BR>
Date:6/29/2004 7:58:11 PM Eastern Daylight Time<BR>
From:<A HREF="mailto:pwl45@yahoo.com">pwl45@yahoo.com</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>
<I>Sent from the Internet </I><BR>
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I'm just experimenting with what I have laying around.</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">I had previously flown this plane with a YS .91 and it just didn't have the power to fly Intermediate well.</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">I deduced that 2M planes were being flown with 1.70's at 10 - 11 lbs, so the 1.20 would have comparable power on a 9 lb plane.</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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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">----- Original Message ----- <BR>
<B>From:</B> <A HREF="mailto:Rcmaster199@aol.com">Rcmaster199@aol.com</A> <BR>
<B>To:</B> <A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A> <BR>
<B>Sent:</B> Tuesday, June 29, 2004 7:35 PM<BR>
<B>Subject:</B> Re: TT Pro 1.20 Question<BR>
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It sounds like a pumped set-up. The tank vent should be left open during operation, to allow air to enter as the fuel is used up. The caveat is that the vent will often syphon fuel out if the vent is out in the slip stream. I use a YS check valve to allow air in but no fuel out.<BR>
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The 2 stroke 120 engine type should be able to turn a 16x10-11; 17x9-10 fairly well in the usable rpm range we need.<BR>
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Why such a large engine on such a small model?<BR>
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MattK<BR>
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