Which Engine Should I use ???

[Ihncheol Park]

Scott,

What size 4-blade prop are you using?  I am going to use Magnum 30% DZ fuel
since that is the only fuel that I have.
My Explorer/Excelleron 90 setup has 91SX-H with extra headgasket, 91FX
crankshaft, stainless main bearing Karl Mueller's wrap around header, tuned
pipe, & perry VP30 pump.

Thanks,

Ihncheol Park
  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Scott Anderson
  Sent: Wednesday, January 05, 2005 10:28 PM
  To: discussion at nsrca.org
  Subject: Re: Which Engine Should I use ???


  Hello,

  I use the OS91FX in a pattern plane and over the weekend Dennis Hunt from
Zimpro had me do a test.. we ADDED lead to my 91 size viper and brought the
dry weight up to 9.5 lbs and went and put a flight on it to see about the
vertical ... And it went without a problem.. I'm running a APC 4 blade prop
and 25% S&W fuel... also have added a perry pump to the set up last year
runs great..

  scott
  nsrca529
    ----- Original Message -----
    From: Daniel J. Hamlett
    To: discussion at nsrca.org
    Sent: Wednesday, January 05, 2005 11:19 PM
    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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