Excelleron with OS 91FX in Intermediate ?

[george kennie]

For me it was a combination.  I saw one fly in Oct. in a pretty stiff
crosswind and was quite impressed how well it appeared to handle. Then
the price was in the area that I felt was more than reasonable so I went
for it. I still have to come up with a better exhaust arrangement than I
am currently employing as I would like to be a little quieter.
G.

Bob Pastorello wrote:

> The 1.20 class two-strokes in this airplane will probably provide the
> best power at the lightest overall weight.  The ST is overkill, and
> added about 8-9 oz overall more than should have been there, because
> it starts out at 31 oz, then add the exhaust system.  Most of the
> 1.20's, I think, are coming in at 31-33 oz WITH exhaust systems, and
> that reduces wing loading about 2 oz/sq.ft. I'm ready to test hop,
> awaiting the header, which is in process.  It is surprising to see
> this one design catch on so rapidly.  Was it price?  Performance?
> Bob Pastorello
> NSRCA 199  AMA 46373
> rcaerobob at cox.net
> www.rcaerobats.net
>
>      ----- Original Message -----
>      From: Randy
>      To: discussion at nsrca.org
>      Sent: Tuesday, December 21, 2004 9:10 PM
>      Subject: Re: Excelleron with OS 91FX in Intermediate ?
>       I order a Tiger Shark 1.20 for my excelleron90.  Should be
>      about right.Randy
>
>           ----- Original Message -----
>           From: Paul Horan
>           To: discussion at nsrca.org
>           Sent: Tuesday, December 21, 2004 6:37 PM
>           Subject: Re: Excelleron with OS 91FX in
>           Intermediate ?
>            Bruce,    Thanks, that's what I am concerned
>           about.  The OS 91 FX most likely will require a
>           pipe to do the job and the Excelleronis not set up
>           for a pipe.  I may have to resort to a larger 2
>           stroke engine.  Bob Pastorello is using a Super
>           Tiger 2300.Not sure I wish to go that big
>           !Thanks,Paul
>
>                ----- Original Message -----
>                From: Pattrnflyr at aol.com
>                To: discussion at nsrca.org
>                Sent: Tuesday, December 21, 2004 5:22 PM
>                Subject: Re: Excelleron with OS 91FX in
>                Intermediate ?
>                 I have a scratch built Typhoon 909 that
>                weighs around 8 to 8.5 pounds.  The
>                "Littlephoon" has 909 square inches of
>                wing, about a 70 inch wing span.  I fly
>                intermediate at 5500 feet MSL.  The YS91
>                did not have enough to fly the Int
>                pattern, because of the two maneuvers
>                you mentioned.  I put a YS 110 in the
>                Littlephoon, and now I have plenty of
>                power swinging a 15X8.  I have no
>                experience with the OS, but I would
>                think the YS would be a little
>                lacking. See ya,
>
>                Bruce
>
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