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Rotax 582 high mount exhaust

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Charlie Mike

Joined: 06 May 2021
Posts: 25
Location: West coast

Posted: Tue Jun 22, 2021 8:41 pm Post subject: Rotax 582 high mount exhaust

Anyone have a pic of their exhaust mount for the muffler oriented above the exhaust manifold?

My current set up has the can too close to the top of the wing.  It will burn it.

Spent 12 hours today assembling the plane.  Ran in to tuning issues that were perplexing.  My guy found the idle jet had come out.  It was sitting in the float bowl.  We were trying everything to trouble shoot it.  Rpm’s were surging all over the place.  Once reinstalled, it ran like a champ.

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Kolb Slingshot 582, C gearbox.

Richard Pike

Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

Posted: Wed Jun 23, 2021 4:47 am Post subject: Re: Rotax 582 high mount exhaust

The further away from the motor mounts you hang the mufler, the more it will be thrashed around by the motor's vibration, and the more likely it will be to develop cracks. 

It is pretty easy to put a heat shield on it, on the side facing the wing fabric and problem solved. We did this on both the FSII and the Firefly and it worked OK.

Here's a picture:  http://oh2fly.net/oldpoops/Muff%20n%20Exhaust.html

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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

Charlie Mike

Joined: 06 May 2021
Posts: 25
Location: West coast

Posted: Wed Jun 23, 2021 7:20 am Post subject: Re: Rotax 582 high mount exhaust

Hey Richard, looks like a nice set up. 

Right now it seems like I have less than an inch and a half of clearance.  After running the engine awhile the fabric scorching.

I’m checking with leading edge to see what they have…

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Kolb Slingshot 582, C gearbox.

Charlie Mike

Joined: 06 May 2021
Posts: 25
Location: West coast

Posted: Wed Jun 23, 2021 7:42 am Post subject: Re: Rotax 582 high mount exhaust

I talked to LEA…. They suggested the same as you did. Heat shield. I may try to modify the mounts to raise the muffler some and go with a heat shield.  Plane is getting closer to flying…..

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Kolb Slingshot 582, C gearbox.

Richard Pike

Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

Posted: Wed Jun 23, 2021 11:39 am Post subject: Re: Rotax 582 high mount exhaust

OTOH, if you never fold the wings, then you can use a Quicksilver type muffler. Problem solved.

http://oh2fly.net/oldpoops/pg2.htm

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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

chic

Joined: 12 Apr 2019
Posts: 55
Location: Riverside Calif

Posted: Fri Jul 30, 2021 9:24 pm Post subject: Re: Rotax 582 high mount exhaust

I have this if interested! Thanks, Chic

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