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Old 03-09-2017, 12:44 PM
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Robert M Robert M is offline
 
Join Date: Feb 2006
Location: South Carolina
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Default Exhaust clearance with bottom of fuselage

Hi guys and gals.

I have just installed the tailpipes on my O-320. I was hoping that I could get some advise on what kind of clearance I should have between the tailpipes and the bottom of the fuselage. I have included a link that shows the clearance - about 3/8".

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Old 03-09-2017, 12:57 PM
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You can start with that. Once you start your engine, things will move around a bit and you can make adjustments to your exhaust hangars then.
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Old 03-09-2017, 01:09 PM
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3/8" seems like it is close but in reality it works. Like everything else on the plane check it frequently during the first hours of operation bu I think you will find it is plenty. Well maybe not plenty but enough.
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Old 03-09-2017, 02:18 PM
jdiehl jdiehl is offline
 
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Location: Williamsport, Pa
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Default Exhaust clearance

Looks about right. In your early flight hours, you'll likely have to tinker with it 'till it settles in. Early on, keep an eye on potential exhaust rub(contact) points, check the tightness of all of the clamps, flex joints, etc.

Jim Diehl 7A
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Old 03-09-2017, 02:48 PM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
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Quote:
Originally Posted by jdiehl View Post
Looks about right. In your early flight hours, you'll likely have to tinker with it 'till it settles in. Early on, keep an eye on potential exhaust rub(contact) points, check the tightness of all of the clamps, flex joints, etc.

Jim Diehl 7A
ditto. these have been hanging untouched for 500+ hrs. you can see a slight paint chip on the RHS above the exhaust. not sure how I got that. I put a small flare on the ends of the hanger rods that fit in to the hose and then clamped.



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RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

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Last edited by Steve Melton : 03-09-2017 at 02:50 PM.
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Old 03-09-2017, 06:58 PM
vetterman vetterman is offline
 
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Location: TX
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Default Exhaust clearance

In looking at your picture, you need to rotate your pipes for more turndown, minimum of 25 degrees to bottom skin. Steve Melrons picture should give you a good reference as they are correct. Also the distance at the top is too close about 3/4 inch as they will tend to ride up at cruise.
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Old 03-09-2017, 08:29 PM
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Steve Melton Steve Melton is offline
 
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nice to get a post from the Vetterman guys on this. consider yourself in the elite. what a great product they made.
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RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

Simplicity is the art in design.
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