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Date:  10-10-2009
Number of Hours:  4.50
Manual Reference:  
Brief Description:  Boot Cowl 9

I'd previously painted the inside of the boot cowl, and I went ahead and primed the outside, including the panel overhead access port and defrost diffusers with OD epoxy primer, followed by Krylon semi-gloss paint. I installed the panels using 6-32 nuts and flush machine screws along the front, and 6-32 flush machine screws along the aft edge, using the previously placed nutplates. I sealed the front seam from the engine compartment as well as the upper panels with red high-temp RTV, to protect from engine fumes and rain, respectively. I hooked up the external power socket and the 1 inch outside air NACA duct to a diffuser made from 1 inch thin-wall 6061 tubing, to which I TIG-welded a 3003 cap on. Staggered 3/16 inch holes direct the outside air to the avionics stack. A nylon mesh was placed around the tube to provent wire chaffing. I made gaskets for the defrost diffusers to keep the hot air from escaping around the base using a high temp closed foam. I painted the boot cowl black, as I don't exactly know where the windshield will set on it, and I can just have the black stripped and painted when it comes time for the final paint job.
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Outside air diffuser in place.

Outside air diffuser in place.

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Upper boot cowl.

Upper boot cowl.

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Another view.

Another view.

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