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Dave's RV-7A Builder's Log
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Date:  2-21-2015
Number of Hours:  5.50
Manual Reference:  
Brief Description:  Air induction system

Another session working on the snorkel, air filter brackets and inlet ramp. Today's challenge centered on the brackets that fit inside the snorkel and hold the air filter in place. The outboard bracket that I made last session just didn’t have enough of a flange for the three nut plates that I was going to attach—this due in part to the fact that I had trimmed it before attaching the nut plates, but also due to the fact that the snorkel extends about ½” too far outboard and barely fits in the inlet. No worries, out with some .032” stock and make a couple of brackets until one fits.

That process took awhile, and like most things, the second one was much better and made in half the time. With a bracket that was acceptable, I then set out to drill the nut plates and start working on the retaining brackets that will hold the filter in place. The nut plates were pretty straightforward—I did have a few minor issues with the three outboard due to close proximity to the bend, but a little grinding and they fit fine. I had to leave for a bit, but upon returning, started working on the retaining brackets.

The air filter kit comes with some rinky dink aluminum strips to use for the brackets, but I decided to fabricate mine out of .050” stock that I had. The inboard bracket is just a flat plate--easy, and for the outboard bracket I simply modified the original one from the kit. For the aft bracket, rather than just laying flat, I wanted it to bend to match the contour of the inlet—and also to hold the aft part of the filter flush with the assembly, so that one took a little more time, but I was pleased with the results.
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