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Jett 90L with Jett Stream 120 Muffler

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Old 06-14-2009, 03:39 PM
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Default Jett 90L with Jett Stream 120 Muffler

Bob,how should I prop this engine (90L) using the red 120 long muffler?

Thanks in advance.
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Old 06-15-2009, 12:22 PM
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Default RE: Jett 90L with Jett Stream 120 Muffler

Try and target around 11,500 - 12,500

14x6 or 13x6 is a good place to start.
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Old 06-26-2009, 09:02 PM
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Default RE: Jett 90L with Jett Stream 120 Muffler

I'm not sure if anyone has done this before but I'm going to try it out in the morning if the weather is good. It sure looks like it going to be fun.

I beefed it up quite a bit. 3050 Metal gear servos all around with carbon fibre rods. It balanced perfect with the Jett on the nose.

I hope I can get 10 mins out of the 18oz tank. I broke it in with the short pipe on the bench. It runs excellent. I'll have to re-tune it with the larger prop and longer pipe.

Thanks for all your help Bob. I appreciate it.


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Old 06-29-2009, 10:08 AM
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Default RE: Jett 90L with Jett Stream 120 Muffler

How did things go? You get a few flights in ?

Bob
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Old 06-29-2009, 04:01 PM
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Default RE: Jett 90L with Jett Stream 120 Muffler

Yes I did....

I used a wood Master Airscrew 14x6. (I'll get some APC's this week) The plane jumps off the ground. It was a little fat in the mid range and I tweeked it about 1/8 turn. Transition is perfect, Idle to full throttle....ZoomZoom. Vertical performance is to say the least FANTASTIC. It's like a rocket ship.

No dead sticks, No blown plugs, No Problems.

I'm still running fat but the engine is new so... I wanted to make sure that it wasn't getting hot. When I landed I could put my hand on the head breifly. Still getting to know the engine, we made three flights but it looks like we'll have a long lasting relationship.

I would love to fly the same model with a YS 110 and compair the two. I think the Jett may be a better set-up. It's got the guts and still has long legs for the low high speed pass. All on 15% fuel with the weight of a .60

The sound on the down leg reminds me of an old Husqvarna I used to own

It's a GREAT SET-UP!!!!!!!!





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