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Home of the Spodplane

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Date: 5-29-2024
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Number of Hours: 5.00
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Manual Reference: 23-08
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Brief Description: Oil cooler BID pad
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Happy with the mocked-up brackets note that the oil cooler needs to rest on the starboard forward corner, needs packing 2mm starboard aft and port forward, and 10mm aft port. Decide a BID pad would be the best method and prepare with a border of plastic strips, and make up a guide cover from taped ply. Following a tip from Sport Aviation apply mold release wax to the taped form, and this worked fantastically! Then layup 7 x BID, tapering from the starboard forward corner to the aft starboard and forward port corner, then another 24 x BID tapering back to the aft port corner. Applying the guage indicates this isn't enough, so added about 8 more to make it work.
While that was curing, made some 'ears' for the sealing face of the oil cooler from 0.032" 4130. Later made some 'washers' from the same material, prepped, primed and painted metallic silver to match the rest of the cooler. Riveted these to the cooler, and filled the gap with high temp RTV in 2 coats. Still needs another, but happy that the 'ears' are solid in position.
After cure the taped frame came off the layup better than any taped thing I've ever had, but the plastic stuck like sh1t to a blanket... Release was may have a more general application than I had previously suspected.
Along the way I had some problems with one particular nutplate that wouldn't let the lower cowling sit properly, ending in a sheared screw. Removed and replaces with a FLOATING nutplate, as recommended in a recent forum exchange. Heartily endorse floating nutplates, and will replace in the future any lower nutplates that cause trouble, and will probably replace ALL the upper ones. They are that good!
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Preppy, preppy
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Progressing nicely
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'Ears' on
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