recommended gear ratio for os 91 c-spec,raptor60 ?
05-17-2004, 05:50 PM
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recommended gear ratio for os 91 c-spec,raptor60 ?
hi,
i fried my 70 engine on my raptor60 and want to upgrade to 90.
what is the recommended gear ratio for the os 91sxh c-spec ?
thanks.
i fried my 70 engine on my raptor60 and want to upgrade to 90.
what is the recommended gear ratio for the os 91sxh c-spec ?
thanks.
05-22-2004, 08:23 AM
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RE: recommended gear ratio for os 91 c-spec,raptor60 ?
Hi Guys,
Just assembled and completed about 10 flights with my Rappy .90 STD. The kit came with both the 11T and 12T pinion. I went with the 12T/96 tooth main spur gear per my instructors recommendation since the C-spec .91 pump is not exactly a whimpy engine. Im running 700mm Mavrikk blades and have been quite pleased with the results, as was my very experienced instructor. The engine is proving to be very torquey (sp?) with a K&S pipe. Per the manual it recommends 11 tooth for 3D and beginners and 12tooth for F3C flying. Hope this helps.
Regards, Johan
Just assembled and completed about 10 flights with my Rappy .90 STD. The kit came with both the 11T and 12T pinion. I went with the 12T/96 tooth main spur gear per my instructors recommendation since the C-spec .91 pump is not exactly a whimpy engine. Im running 700mm Mavrikk blades and have been quite pleased with the results, as was my very experienced instructor. The engine is proving to be very torquey (sp?) with a K&S pipe. Per the manual it recommends 11 tooth for 3D and beginners and 12tooth for F3C flying. Hope this helps.
Regards, Johan
