Exhaust for ULS

by Eugene Klimenko in General Tech Discussion 6 years ago

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Re: Exhaust for ULS

by Eugene Klimenko » 6 years ago

Eugene Klimenko

12 74 1

Wondering if we know general recommendation for my situation:

- is it OK for hot muffler to be only one inch away from oil filter?

- what distance should be hot uninsulated exhaust pipes be away from water hoses, oil hoses and wing fabric?

note: engine will have cowling when I am all done

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Re: Exhaust for ULS

by Roger Lee » 6 years ago

Roger Lee

127 5.21k 4.79k

You just need enough room to unscrew and take the oil filter off otherwise you'll always have to remove the exhaust pipe to remove the oil filter. Hoses that are close should all have some heat shielding. There are a few easy ways to do this. All fuel and oil should be in fire sleeve. If you have things that are close or want to reduce some heat radiation on hoses and wires you can wrap the exhaust in header wrap cloth. The header wrap cloth folks say up to a 70% heat reduction, but some MFG's tend to stretch numbers at times and then there are different installations, but even if it's 50% that's a lot of heat not being radiated on hoses and wire insulation and a big reduction in convected heat.

Just food for thought. There are a ton of folks in my area and around the US that have wrapped exhaust pipes. I've always had my pipes wrapped.

p.s.
If you do use header wrap cloth DO NOT over wrap any EGT probes. The cloth will cause fluctuations on your readings.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Thank you said by: Eugene Klimenko

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Re: Exhaust for ULS

by Garrett Wysocki » 6 years ago

Garrett Wysocki

1 572 1.45k

Eugene, My Remos uses silicon high temp coolant hose for the lower half of the motor. In the Remos installation there is less than 1/4" clearance between exhaust down pipes and the hose and has performed perfectly for the last 9 years. It bends without kinking, does not break down like rubber and withstood the heat when my exhaust pipe broke while every other piece of plastic burned/melted. If you're interested Mac at SkyBound Aviation 579-450-5196 stocks this hose.

Thank you said by: Eugene Klimenko

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Re: Exhaust for ULS

by Eugene Klimenko » 6 years ago

Eugene Klimenko

12 74 1

I was told that wrapping exhaust pipes will cut life expectancy by 50%. Not sure if this is correct statement or not.

Were do I find needed wrapping material?

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Re: Exhaust for ULS

by Roger Lee » 6 years ago

Roger Lee

127 5.21k 4.79k

Not True. Many have wraps and have never had any issue. If you over wrap it then you may cause an issue, but you should read the instructions which many men have a hard time doing (according to our wive's) before you wrap the pipe. My last plane had about 1500 hrs. before I sold it with wrap. People that make this comment usually don't know the metallurgy of the stainless steel.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Thank you said by: Eugene Klimenko

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Exhaust for ULS

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