Which Engine Should I use ???

[Ihncheol Park]

Dan,

I would go with the 91FX rather than the 91Surpass II pump.  Eddie used YS
91 prior to YS 110.  91FX does not have to run faster rpm.
If you have a perry pump, it will be better.  If you like to work on the
plane a little more, go with a muffled tuned pipe.
There are several people using tuned piped setups for the Excelleron 90s.

My 91SX w/ tuned pipe setup may need some weight in the nose, but not sure
yet.


Ihncheol Park
  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Daniel J. Hamlett
  Sent: Wednesday, January 05, 2005 10:20 PM
  To: discussion at nsrca.org
  Subject: Which Engine Should I use ???


  I am going to be putting together an Exceleron 90.  I have 2 different
engine options.  First is an OS FX91, second is an OS FS91 Surpass w/pump.
Both are NIB.  I have flow previous planes with a different 91FRX.  I am
good with engines so I am not worried about any finicky engine issues with
either one.  I have 2 two meter planes right now.  This plane is one that I
want to be able to get home from work, grab it and go.  The 2 meter planes
take a little bit more preparation to get them going quickly.  I want the
plane to fly well with a good power curve.  I know that the 91FX will want
to be flown a little bit faster, but how much I don't know.  Also would the
FS91 II Surpass be enough to fly the plane well.  I will most likely be
flying the intermediate pattern next year, so it doesn't have to be oh my
God outrageous performance.  But I don't want tit to be a dog either.

  If there is anybody with any time on this plane that could shed some light
on the situation it would be greatly appreciated.

  Dan
  Dst. 1
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