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Rob's REBVAIR Project
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Date:  5-31-2015
Number of Hours:  4.00
Manual Reference:  
Brief Description:  Heat muff

Using two end brackets provided with WW"s exhaust, I fabricated this heat muff with 0.020 stainless sheet. The end result looks good, but it is heavier than what I think it ought to be, compared with some of the minimalist set ups I've seen.

Of course, once attached to the exhaust it is very robust, and feels well-equipped to withstand this high heat and high vibration environment.

Image 2 shows how nicely it tucks in between the motor mount cross members (all WW's design), with a very short section of SCAT hose connecting it to the firewall cabin heat box.

Image 3 shows how it connects to the air intake box on the lower cowling. In flight, air always passes through the SCAT hose, through the muff, out the second hose, then out the cabin heat box (unless the valve is open to the cabin). When you pull carb heat, the front of the air intake box closes (not shown here), and hot air is drawn through the system in 'reverse' flow, back into the air intake box, and up through the carb.
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