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  #1  
Old 06-23-2018, 07:31 PM
maus92 maus92 is offline
 
Join Date: Nov 2013
Location: Annapolis MD
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Default Broken exhaust hanger

Discovered during condition inspection. Has any ever had one of these break before? Any tips on ordering a new one? I believe this is a Vetterman system, but I don't see parts on their website (also called Friday and left a message - although it looks like they keep limited hours on Fridays (I wish I could do that.))

https://www.dropbox.com/s/qb172t5jb5..._0934.png?dl=0
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  #2  
Old 06-23-2018, 07:34 PM
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scard scard is offline
 
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Yes, they have broken before. It is a simple piece of stainless tubing, easily fabricated in a few minutes after you source the tubing... from Vetterman Exhaust if you like .
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  #3  
Old 06-23-2018, 07:38 PM
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Sam Buchanan Sam Buchanan is offline
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Location: North Alabama
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Quote:
Originally Posted by maus92 View Post
Discovered during condition inspection. Has any ever had one of these break before? Any tips on ordering a new one? I believe this is a Vetterman system, but I don't see parts on their website (also called Friday and left a message - although it looks like they keep limited hours on Fridays (I wish I could do that.))

https://www.dropbox.com/s/qb172t5jb5..._0934.png?dl=0
RVers have been repairing exhaust hangars since....there were RV exhaust hangars.

Go to your local auto parts store and pick up a length of 3/8" steel brake line. A piece a couple of feet long will keep you stocked with exhaust hangers for many years to come. Gently flatten one end of a piece of brake line, drill the bolt hole, loosen the clamp on the rubber hose and replace your broken hanger. Keep a short piece of brake line in your flight kit for repairs when away from home.
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  #4  
Old 06-23-2018, 09:03 PM
maus92 maus92 is offline
 
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Thanks everyone, another project!
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  #5  
Old 06-24-2018, 08:20 AM
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drill_and_buck drill_and_buck is offline
 
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Left unresolved, a broken hanger can cause bigger problems. A good reminder to give each pipe a wiggle test as part of your preflight procedures.
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  #6  
Old 06-24-2018, 09:07 AM
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Carl Froehlich Carl Froehlich is online now
 
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I had a recurring ploblem with these flattened steel tubes breaking off just like yours. I replaced them with solid aluminum rod. Never had another problem.

Carl
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  #7  
Old 06-24-2018, 10:26 AM
Aggie78 Aggie78 is offline
 
Join Date: May 2014
Location: Fort Worth, Texas
Posts: 340
Default Replacement Hangers

After I discovered a couple of broken ones, I sourced new ones from the folks up at Vetterman, who have designed a thicker, more robust set.

Approximately 100 hours since Iíve replaced them all with the newer ones and no breakage so far. Looks like a good fix.

I check them every time I pull the cowls off...when itís also a good time to hit all the exhaust pivot joints and unions with a healthy dose of Mouse Milk to keep them able to move as they are designed to do.

You will develop a list of items that youíll check every time you un-cowl ďjust to be certainĒ or after having had an issue inflight...

The exhaust system and components are a good candidate for this list...among others.
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  #8  
Old 06-24-2018, 11:55 AM
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Sam Buchanan Sam Buchanan is offline
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A couple of items I've learned after nearly twenty years of fiddlin' with exhaust hangers on the RV-6:

1) If you use steel tubing, the flattened end should be made with a gradual swage, not an abrupt swage as will result if you just slam the vice jaws down on it. A small radius swage is much more likely to break.

2) My earliest set of hangers used not only the flattened ends but also a bend in the flattened portion. That is certainly a recipe for failure. After repositioning clamps to eliminate any bends reliability went up considerably.

3) The aluminum/steel rod instead of steel tubing is a good solution if it fits the particular installation.
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  #9  
Old 06-24-2018, 12:05 PM
Kyle Boatright Kyle Boatright is offline
 
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Quote:
Originally Posted by Sam Buchanan View Post
A couple of items I've learned after nearly twenty years of fiddlin' with exhaust hangers on the RV-6:

1) If you use steel tubing, the flattened end should be made with a gradual swage, not an abrupt swage as will result if you just slam the vice jaws down on it. A small radius swage is much more likely to break.

2) My earliest set of hangers used not only the flattened ends but also a bend in the flattened portion. That is certainly a recipe for failure. After repositioning clamps to eliminate any bends reliability went up considerably.
Agree 100%.
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  #10  
Old 06-24-2018, 12:53 PM
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erich weaver erich weaver is offline
 
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Quote:
Originally Posted by Sam Buchanan View Post
If you use steel tubing, the flattened end should be made with a gradual swage, not an abrupt swage as will result if you just slam the vice jaws down on it. A small radius swage is much more likely to break..
What is your recommended technique for producing a gradual swage Sam?

Thanks
Erich

Last edited by erich weaver : 06-24-2018 at 01:45 PM.
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