OS 91FX

[Rcmaster199 at aol.com]

The 91 FX is stronger than the ys 91 4 cycle with some margin. Stretch the 
pipe a bit with an extra long header and run the larger prop. The set-up will 
amaze you with its output and quietness. Good friend Nat is using it on his 
X-Press turning a 17x10 N cut down 1/2 inch. Plenty of power for the 8-9 pound 
plane.

Matt K


> Subj:OS 91FX 
> Date:10/24/2003 12:50:40 PM Eastern Daylight Time
> From:<A HREF="mailto:DGundling at compuserve.com">DGundling at compuserve.com</A>
> Reply-to:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> Sent from the Internet 
> 
> 
> 
> What is the story on the 91FX. I have seen guys reporting
> that they are running up to 15 inch props. Reports of running
> a 14-10 are common. Is this with the muffler or is it obyained only with a
> tuned pipe? The factory 
> recommended prop is something like a 13-8.On RC Universe there has
> been a love/hate situation with the engine. Some report no troubles.
> Others can't get it to run well
> despite numerous efforts and parts changes. Is this thing as strong as a
> YS91?
> 
> Thanks.
> 
> Dave  

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