<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Bill, is your pipe set short? The pipe I use (Hatori) has the first deflector plate located at 23.75" from the glow plug, straight line or around 24.5" along the centerline of the header. Are you running a large enough prop to keep rpm at around 78-8000 or so? <BR>
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I typically will run one type F plug per 150 runs in the 145, using a 20% nitro and 19% oil blend. My fuel blend is a 50:50 mix of 10%cool power and 30% heli cool power. The large head of the Webra (large heat sink) just about requires the hot F type plug to run right. I've had limited success running other plugs in the engine.<BR>
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hope that helps you <BR>
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MattK<BR>
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</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">I have to change plugs on a Webra 1.45 about every dozen flights....... I'm sure it's not a mixture problem. The plugs are OS-F plugs...... any ideas what the cause might be??</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">Thanks</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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