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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> SJ-90LX
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SJ-90LX - 4/15/2005 3:38:44 PM   
js3



Posts: 1142
Joined: 1/30/2002
From: Arvada, CO, USA
Status: offline 		Bob,

What is the performance like on the SJ-90LX when using a Turbo-Jett? Does it work or does it suffer?

_____________________________

John
I feel a lot more like I do now than I did earlier!
       Post #: 1

RE: SJ-90LX - 4/16/2005 6:09:06 PM   
bob27s



Posts: 4821
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		JS3,

You can use the 10cc turbojett with the LX. It will not turn as high as with the jett-stream LX length muffler that it would normally be provide with, but being high-timed it will still turn up fairly nicely. Still requires the use of 10-11-12" props. Prop selection still must be made to keep the engine up over 14K rpm.

Normally the standard SJ-90L uses a 15cc turbojett. That combination is capable of turning the heck out of a 13x8 or 14x6 (lots of torque).

I have not personally tried the LX with a turbo. I believe Dub has run it that way. I will try to get some data for you.

Bob


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Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

(in reply to js3)
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RE: SJ-90LX - 4/17/2005 2:45:05 AM   
js3



Posts: 1142
Joined: 1/30/2002
From: Arvada, CO, USA
Status: offline 		Thanks Bob. Any info you can provide would be great.

You might know where I'm going with this... The proposal for .90 sized F1 Racing!

_____________________________

John
I feel a lot more like I do now than I did earlier!

(in reply to bob27s)
       Post #: 3

RE: SJ-90LX - 4/17/2005 4:50:24 PM   
bob27s



Posts: 4821
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		Very good.......

That idea has been around for a little while now.

Duane Gall ( DHG) developed a Cosmic Wind/Toni/Ballerina design a few years ago for that exact purpose. Larger size F-1 event.

He is running a SJ-90L with a turbojett in his current version of that aircraft. Performs quite well.

Bob


_____________________________

Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

(in reply to js3)
       Post #: 4

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> SJ-90LX
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