<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">In a message dated 9/17/2002 12:44:23 PM Eastern Daylight Time, chuckwagon@charter.net 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>OS 140 RX with Dual Plug Conversion plus Webra Memories </B><BR>
Date:9/17/2002 12:44:23 PM Eastern Daylight Time<BR>
From:<A HREF="mailto:chuckwagon@charter.net">chuckwagon@charter.net</A><BR>
Reply-to:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
To:<A HREF="mailto:pattern@rcmailinglists.com">pattern@rcmailinglists.com</A>, <A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
CC:<A HREF="mailto:lee@piedmontmodels.com">lee@piedmontmodels.com</A><BR>
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<I>Sent from the Internet </I><BR>
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Dual plugs<BR>
anyone?http://www.rcaerosport.com/articles/reviews/evolis/crino/e10.htm (I<BR>
remember my very smooth running dual-plug Merco 60.)<BR>
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Also another 2-stroke memory... the great Webra slide valve carb. Mine<BR>
seemed to give INSTANT RPM up from an all-day idle with my stock single plug<BR>
Webra black head engine! It had almost zero spool-up or spool-down time to<BR>
or from any level(s) I chose. Blip...blip...blip <happy smile>. Once I made<BR>
an adaptor and tried the slide valve with a ST blue head. Same dynamics.<BR>
Also gave more HP than the stock ST carb. Just some thoughts.<BR>
Chuck </BLOCKQUOTE><BR>
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Chuck <BR>
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the Dynamix carb, or slide valve carb, that you mention worked extremely well for me also. Duke Fox first used the concept in model engines back in the sixties I believe. The concept was not lost on Webra, since their Dynamix carb was a most effective device.<BR>
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The idea is to get uninterrupted air flow in the throat of the venturi, by moving the spray-bar against the wall of the venturi. Better breathing results in more power for a given set of parameters.<BR>
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Matt Kebabjian</FONT></HTML>