4 pipe exhaust bracket pics

[macflyer]

Hi,
I have a 4 pipe Vetterman exhaust and have been having troubles with one side hitting the cowl or the cross, bottom engine mount. If anyone has a few pics of there's, I would appreciate viewing to get some perspective!
Thanks!

 

[Carl Froehlich]

Only photo I found.
Carl

 

[fixnflyguy]

You may be able to zoom in on these pics, but I built my -4 and used 3/8 Stainless tubing with Heim joints at the sump and the tie clamps on each side. I made a small angled tab for the sump and the tie clamp to set the angle. I have no cross support between left and right sides. My pipes move with the engine and are not tied to the airframe at all. Over 400 hrs, no cracks or looseness at all.

 

[macflyer]

Thanks!! Did you place in rubber hose in between the pipes?

 

[macflyer]

Only photo I found.
Carl

Thanks! How are they hung? Brackets to the sump?? My tail pipe attachments aren't turned down like yours.

 

[N890GF]

This is my four pipe exhaust on my -7. I fabricated some hangars and then a crossbar that connects the two sides. There are two hangars like this, one on each side. I can probably get more pictures tomorrow when I’m back in the hangar.

 

[RVbySDI]

This is my four pipe exhaust on my -7. I fabricated some hangars and then a crossbar that connects the two sides. There are two hangars like this, one on each side. I can probably get more pictures tomorrow when I’m back in the hangar.

Hanging the exhaust off of the engine mount will eventually cause problems. The exhaust pipes need to move with the engine. So, should be secured to the engine.

 

[Carl Froehlich]

Thanks! How are they hung? Brackets to the sump?? My tail pipe attachments aren't turned down like yours.

My install is on an RV-8. The brackets go to the engine mount and have the standard mid section rubber hose to allow flex. I have never hung exhaust supports from the engine sump as I consider the moment arm (the amount of pipe hanging unsupported) too large. But perhaps this is the best option for your RV-4.

Carl

 

[macflyer]

Thanks!!!

 

[macflyer]

This is my four pipe exhaust on my -7. I fabricated some hangars and then a crossbar that connects the two sides. There are two hangars like this, one on each side. I can probably get more pictures tomorrow when I’m back in the hangar.

Thanks so much!! How do they not slide down the engine mount?

 

[macflyer]

Hanging the exhaust off of the engine mount will eventually cause problems. The exhaust pipes need to move with the engine. So, should be secured to the engine.

Thanks. Yes, I found that out!! Appreciate your input!

 

[N890GF]

Hanging the exhaust off of the engine mount will eventually cause problems. The exhaust pipes need to move with the engine. So, should be secured to the engine.

The hangars have a generous amount of flex in the middle rubber part to allow for movement. We’ll see how long it lasts

 

[N890GF]

Thanks so much!! How do they not slide down the engine mount?

The clamps are quite strong on the mount, I have not seen them move, so if they are sliding at all, it’s unnoticeable. We’ll see how long it lasts and if I need to redo them in the future

 

[macflyer]

The clamps are quite strong on the mount, I have not seen them move, so if they are sliding at all, it’s unnoticeable. We’ll see how long it lasts and if I need to redo them in the future

Thanks!!! Mine moved. Part of the issue.

 

[fixnflyguy]

Thanks!! Did you place in rubber hose in between the pipes?

No rubber hose in my set up.

 

[macflyer]

You may be able to zoom in on these pics, but I built my -4 and used 3/8 Stainless tubing with Heim joints at the sump and the tie clamps on each side. I made a small angled tab for the sump and the tie clamp to set the angle. I have no cross support between left and right sides. My pipes move with the engine and are not tied to the airframe at all. Over 400 hrs, no cracks or looseness at all.

Do you have any close up pics of the attachment points?

 

[Jjackh10]

You may be able to zoom in on these pics, but I built my -4 and used 3/8 Stainless tubing with Heim joints at the sump and the tie clamps on each side. I made a small angled tab for the sump and the tie clamp to set the angle. I have no cross support between left and right sides. My pipes move with the engine and are not tied to the airframe at all. Over 400 hrs, no cracks or looseness at all.

Not to drift the thread too much but is a 2 pipe heat muff like yours something that can be purchased somewhere?

 

[Foghorn]

I’m experimenting with new hangers on my 4 pipes. My heat muff was starting to rub the cowling because of sagging pipes.

So I made brackets from 1/8” x 1” steel and connected it to the top of the two pipe brackets. I used an another piece of 1/8” x 1” steel clamped to the lower cross bar with two adel clamps (weakest link). I connected the two pieces with some rubber exhaust hanger material. I used SS tube as spacers through the exhaust hanger which allows the pipes to move around. I decided not to connect the two sides together. My ball joints are well lubricated and the pipes can move left/right about 2 inches. I’ve only flew it twice so success is TBD.

 

[BravoAlphaRomeo]

Hey Jeff, I like the use of that muffler hanger material. I also also bought some of that and I’m using it. On your application, I think you would get better success if you pinned the ends, so there was no movement and allowed all the vibration and movement to happen in the middle of the belt. I would just think the holes are gonna wallow out on the end very quickly if there’s any movement. Anyway, just an observation.

 

[fixnflyguy]

Not to drift the thread too much but is a 2 pipe heat muff like yours something that can be purchased somewhere?

I scratch built my heat muff and carb heat scoop/box. I made form blocks for the Stainless end pieces that match the tubes and folded up the angular heat muff, nut plates on each side to hold the halves together. The carb heat scoop is a partial wrap and open on the inner side, with similarly built stainless ends. May be able to see the heim joint and angular tab for the sump/exhaust hanger in the last photo if you zoom in, and the hanger tube going to the left pipe cluster in the photo labeled cables.. I can take more detailed pics when I'm down at my hangar.

 

[Jjackh10]

I scratch built my heat muff and carb heat scoop/box. I made form blocks for the Stainless end pieces that match the tubes and folded up the angular heat muff, nut plates on each side to hold the halves together. The carb heat scoop is a partial wrap and open on the inner side, with similarly built stainless ends. May be able to see the heim joint and angular tab for the sump/exhaust hanger in the last photo if you zoom in, and the hanger tube going to the left pipe cluster in the photo labeled cables.. I can take more detailed pics when I'm down at my hangar.

I really like how it turned out. I wish I had all of my tooling with me so I could emulate it.

 

[macflyer]

I scratch built my heat muff and carb heat scoop/box. I made form blocks for the Stainless end pieces that match the tubes and folded up the angular heat muff, nut plates on each side to hold the halves together. The carb heat scoop is a partial wrap and open on the inner side, with similarly built stainless ends. May be able to see the heim joint and angular tab for the sump/exhaust hanger in the last photo if you zoom in, and the hanger tube going to the left pipe cluster in the photo labeled cables.. I can take more detailed pics when I'm down at my hangar.

So appreciate it! Feel free to send the pics to my email: [email protected]