Which Engine Should I use ???

[Dean Pappas]

Hi Scott,
tell us the pipe and length again.
 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Scott Anderson
Sent: Wednesday, January 05, 2005 11:28 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  <mailto:d77hamlett at comcast.net> 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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