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Derricks SeaRey Build
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Date: 12-28-2015
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Number of Hours: 0.75
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Manual Reference: 14.2 & 63
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Brief Description: Root Tube
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Ran into a bit of an issue with the Root Tube supports.
The Root Tube Support - Mid, did not match up with the lower surface of the root tube and the bolts holes would not line-up.
Everything else seemed to be in order so I narrowed down the trouble to the cut on the aft end of the Mid Support, specifically, the angle of the cut.
In my opinion, end was cut at too large of an angle, roughly 47-48 degrees. Should have been around 41-42.
So I called PA and asked for a copy of the engineering drawing for the Root Support - Mid, and they were very helpful and provided me with a copy.
The drawing coinfirmed my suspicion,, the aft angle should be 41.
I trimmed the support according to spec, and was able to line up the bolt holes per plans.
I did have to sand down the top end Forward Root Tube support, ever so slightly (about a 64th or so), so I could ease the root tube into place and line up the bolts holes without too much effort.
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This illustrates the mis-cut end of the support
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Comparing the aft end with the design drawing
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After the trim
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