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RV-7A Construction Log
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Date:  10-7-2017
Number of Hours:  1.00
Manual Reference:  
Brief Description:  Exhaust Heat Muff 1

I've been pondering where to install this heat muff on the Vetterman exhaust. As provided it is suppose to go on the number one pipe as shown in figure 2, with intake coming from the air inlet at front of the engine. But I cut the air let at the rear of the baffles as shown on Van's drawings and I don't want to cut a new hole on the ramp into the left inlet.

I'd like to put it on the exhaust pipe as shown in figure 1, but it won't fit there due to the hangar fittings and the ball joint.

So finally I got out the bottom cowl and put it on to see what kind of clearances I have for two flexible ducts on the outside of the exhaust pipes. Turns out they will fit as shown in figure 3.
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Preferred location but won't fit

Preferred location but won't fit

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Planned for exhaust #1

Planned for exhaust #1

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Clearance is fine for ducts

Clearance is fine for ducts

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