Thermal exhaust wrap

by james thomas in 912 / 914 Technical Questions 8 years ago

Page 2 of 2

Start
Prev
1
2
Next
End

Re: Thermal exhaust wrap

by Tom Kodey » 8 years ago

Tom Kodey

5 48 15

Thanks. How much do you wrap? Anything else beyond the exhaust pipes between the header and muffler? Muffler? Tail pipe out of the muffler?

Also, how do you secure the ends of the wrapping? Stainless hose clamps?

Report
Re: Thermal exhaust wrap

by Roger Lee » 8 years ago

Roger Lee

126 5.14k 4.58k

Hi Tom,
Just wrap from where the exhaust pipe exits the cyl. and down to and under the springs. Different aircraft may have different lengths of exhaust pipe. You dampen the wrap cloth (not soaking it) and go around 1.5 turns at the beginning of the wrap and apply a hose clamp. Then only over wrap each spiral wrap edge 3/8" as you warp down the pipe. Do not over wrap by more than this because too much over wrapping will cause too much heat retention in the pipe. Even though these are stainless steel pipe they do have their limits. I wrap down to the springs then go under the springs leaving them exposed. 1-2 wraps under the spring and then put a clamp in place to hold it in place. Do not put wrap over the springs and there is no need to wrap the muffler. If you have a tad of blow-by at the knuckle under the spring and can't get it sealed other ways this will take care of that too.
If you have EGT probes do not over wrap these. The cloth seems to affect the readings and it can cause temps to bounce up and down 100F. There is something in the cloth that affects the probe and no one seems to know what. Wrap up to an EGT probe and clamp it. Then start again on the other side.
The wrap is 2" wide. It can be purchased at many automotive stores. It comes in a 50' roll for about $50. Enough to do 2-3 planes. In most planes I use approximately 54"-58" of cloth per pipe.

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

Report
Re: Thermal exhaust wrap

by Tom Kodey » 8 years ago

Tom Kodey

5 48 15

Thanks, Roger. Big help ...

Report

Page 2 of 2

Start
Prev
1
2
Next
End

You do not have permissions to reply to this topic.

Title	Category	Replies
912 UL exhaust	912 / 914 Technical Questions	2
Stubborn exhaust leak?	General Tech Discussion	6
Mysterious blue residue? Exhaust leak?	912 / 914 Technical Questions	8
Exhaust system	912iS Technical Questions	3
Exhaust Pipe Nut Torque	912iS Technical Questions	2

Thermal exhaust wrap

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login