<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">In a message dated 11/12/2003 1:29:29 PM Eastern Standard Time, anthonyr105@hotmail.com writes:<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>Glow plug failures </B><BR>
Date:11/12/2003 1:29:29 PM Eastern Standard Time<BR>
From:<A HREF="mailto:anthonyr105@hotmail.com">anthonyr105@hotmail.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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Have an Os 1.40 that has a pretty healthy appetite for glow plugs. First, <BR>
was blowing the seal so I added a head shim and pulled out the pipe a <BR>
little. Now the just seem to loose conductivity. Engine runs fine but go to <BR>
restart for next flight and nobody home. Typically lifespan is about 30 <BR>
flights.<BR>
Using Type F, S&W 20% nitro 16%syn 2%castor fuel, Es pipe at 23" with Mac 2 <BR>
1/"4 header, Apc 16.5 *12W resulting in a peak setting around 8100 and a <BR>
launch setting of 8000. Have another head shim on order and will try a <BR>
little longer pipe if the weather ever improves. Any other suggestions?<BR>
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TIA<BR>
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Anthony<BR>
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Anthony,<BR>
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The prop may be a little on the lite side for the engine, but others use so that's probably not the main issue. I would use a different fuel and experiment a bit. Try Kool Power or Powermaster that other fellows are using with great success. <BR>
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My favorite is a 50:50 mix of 30% CP heli blend and 5% standard CP, and a 17x12 std APC<BR>
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MattK</FONT></HTML>