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Sport Jett .76 - 8/2/2002 12:29:32 AM   
daven



Posts: 6764
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		I am working on the Pica 1/8th Scale Corsair and plan to install a Jett, but am debating which one. I'm leaning towards the .76 with the turbojett muffler, but am unsure if the the .61 or .65 would be a better choice.

This is a 60 sized plane that I plane to fiberglass and paint. It will have retracts, and flaps so the weight should be up.

I like performance, and a standard 60 sized engine will not cut it.

I'd appreciate any ideas or comments.

TIA

_____________________________

Dave Norman

klasskote.com
supertrc.com
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Sport Jett .76 - 8/2/2002 2:07:14 AM   
bob27s



Posts: 4736
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		Dave...

I looked very intently at the PICA corsair while at the Toledo Show. A very tempting project for me I even took the SJ-90 with the turbo over to their booth to see how it fit inside the cowl.... looks like a perfect fit.

If you are going to go with the 76 size engine, maybe consider using a SJ-90L-T. It is the same size, actually lighter a bit. The T version is timed for lower RPM, and a bit more torque so you can run a larger diameter prop.

Based on the finished "sport" weight, and what the PICA folks told me about power requirements, using the SJ-60L (small block) is not out of the question if the plane stays light.

Either with the turbo-jett should work great.

(in reply to daven)
       Post #: 2

Sport Jett .76 - 8/2/2002 7:17:37 PM   
daven



Posts: 6764
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		Sounds like the SJ-90-L-T is the way to go. I didn't expect any problems with the engine and muffler fitting, that cowl looks like a one gallon ice cream bucket.

Thanks for your advice, I will be picking up the 90 in the next couple of months.

_____________________________

Dave Norman

klasskote.com
supertrc.com

(in reply to daven)
       Post #: 3

SJ 76 Timing - 8/15/2002 7:45:16 PM   
John Wells



Posts: 817
Joined: 12/11/2001
From: Overland Park, KS, USA
Status: offline 		Regarding the Sport Jett 76, would changing the muffler from the long one to the shorter one give it the higher RPM's? I have the long, red muffler.

Thanks

JW

(in reply to daven)
       Post #: 4

Sport Jett .76 - 8/15/2002 11:26:47 PM   
bob27s



Posts: 4736
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		The muffler supplied with the SJ-76 is the "short" one for the 61-90L class of engines. The 90L-T has a slightly longer muffler, and a slightly re-timed sleeve to go along with it.

If you were provided with the 90T long muffler for yout 76, then YES, going back to the standard muffler will get you back to baseline, higher RPM range.

(in reply to daven)
       Post #: 5

Sport Jett .76 - 8/15/2002 11:35:15 PM   
John Wells



Posts: 817
Joined: 12/11/2001
From: Overland Park, KS, USA
Status: offline 		Thanks bob27, is there a measurement or identifying mark that would confirm this is a 90 muffler? Also, my muffler is unused/new. Could I return it and pay any difference for the alternate one?

Thanks,

John Wells

(in reply to daven)
       Post #: 6

Sport Jett .76 - 8/16/2002 12:24:42 AM   
bob27s



Posts: 4736
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		John,

For the 65,76,90L muffler, from the center line of the exhaust opening, back to the tail cone joint is 7".

On the 90L-T, this is 8.5"

basically the 90L-T muffler is the SJ120 muffler tube assy mounted, on the 90 header.

As for returns/swaps, you will have to call or email Dub directly.

Just for info, the stock 7" muffler will work well up to about 16,500 rpm (ground). You just have to prop the engine to get there.

(in reply to daven)
       Post #: 7

Thanks - 8/16/2002 1:11:29 AM   
John Wells



Posts: 817
Joined: 12/11/2001
From: Overland Park, KS, USA
Status: offline 		Thanks for the info!

JW

(in reply to daven)
       Post #: 8

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> Sport Jett .76
Page: [1]





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