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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> need 4 spped
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need 4 spped - 8/12/2002 3:21:54 AM   
speedaholic



Posts: 281
Joined: 4/11/2002
From: fresno, CA, USA
Status: offline 		i am building a hanger 9 p-51 and want it to go really fast. i currently have a world models p-51 with a os91FX and it goes 148mph, looking to beat that and am interested in the jet 120 what do you think. air frame will be worthy by time i am done with it. i have a jett50 and jett61. both good engines.
       Post #: 1

need 4 spped - 8/12/2002 5:18:03 PM   
bob27s



Posts: 4736
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		Hi, thanks for writing.

I am sure a SJ-120 combined with the stock Jett-Stream would provide some major pull on an H9 Mustang, but it would require a bit of experimenting with props to get the speed you are looking for. The engine is designed to run in the 9500-10000 rpm range.

There is a Turbo-Jett in-cowl tuned muffler available for the engine that will provide excellent performance.

I would caution, that this is a LOT more engine than recommended by the manufacturer for the aircraft.

These links may be of interest
http://www.jettengineering.com/hall/at6com.html
This AT-6 racer is powered by a SJ-120/turbojett combo.

http://www.jettengineering.com/engines/sj120dub.html
Dubs comments and background on the 120

Keep in mind, that the 120 is the same mounting dimensions as the "60" big block engines, but is about a half inch longer, and a bit heavier.

If weight is a concern, you may also wish to consider the SJ-90L or BSE 90 which are lighter and designed for a bit higher RPM.

I hope this is helpful.
Bob Brassell

(in reply to speedaholic)
       Post #: 2

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> need 4 spped
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