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Old 09-15-2006 | 08:31 AM
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ghost123uk
 
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From: Chester, UNITED KINGDOM
Default RE: OS engine designations
ORIGINAL: Ployd

I beg to differ on the identification of the OS 35FS as a 4stroke designation as there was an FSR (4stroke-racing ) handle applied to some of the 2stroke engines in the late 70's (these were twin ballrace) and while I do not have my file handy, believe the FS is the plain bearing version.

Ployd
Yes Ployd, this is what I thought from mutterings I have heard at the flying field.

I have given up trawling the web for definate answers as I have work to do !!

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