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Michael and Gayle's RV-7A
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Date: 4-11-2009
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Number of Hours: 8.00
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Manual Reference:
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Brief Description: Cowling rings, Oil Cooler plenum mod, bleed brakes
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First prepared the rings by applying two coats of wax so the resin would not stick to them. Applied clay in the key slot on each ring at the point where the cowling halves match up -- also so that no resin would join the halves. Next, using aluminum tape, carefully fixed each ring to the bottom cowl, then mated the two cowling halves together. Tightened the 10-32 screws outside of the spinner ring, and also installed the 1" x 1" steel tubing jig so that there would be no movement. Finally, squeezed more clay into the seams between the halves effectively creating a barrier between the two halves. Chopped up some 8oz mat and mixed up a slurry of resin and poured the mixture into a caulking gun (tube). With the cowling now standing on it's nose, reached inside with the caulking gun and filled the key ways with the resin. Now, just have to wait and hope that there's no point where the halves get joined... While that was curing, used the rest of the resin and added some fill material to the Oil Cooler plenum -- that's now curing too. Still with plenty of daylight and enery, I tackled bleeding the brakes! Simple setup: 1/4" clear line attaches to top of brake resevoir, and empties into a clear glass bottle. A pump-pot with wand is used that has 3/16" clear line to attach to the brake bleed valve nipple on each main. Pump up the pot, open the trigger and brake fluid is forced up into the system (via the bleed valve) from the bottom, and pushes any air bubbles up and on into the glass jar! When done, tighten the bleed valve, then release the trigger. Simple! Very productive day.
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Left side ring keyway curing
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Filler material applied to Oil Cooler plenum
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Quite a setup for bleeding the brakes!
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