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Sunday, July 1, 2018

Wing Rear Spars

I'm way late getting this section published.  Wanted to get a picture of the kids with them and kept forgetting, oh well.

There are two parts here that are a little tricky.  Getting the holes created in the rear spar doublers and incorporating the Service Bulletin into the build.

For the holes in the rear spar, I first tried drilling large holes then filing out the remainder.  Pretty sure this is how the instructions tell you to do it.

That seemed to be more work than it was worth.  So instead i drilled the perimeter with smaller holes.


Same result, just easier to do.  Once the middle was cut out, I used a half-round bastard file I've had laying around forever.


 Oh and here's a BEEFY stiffener that is warped from the factory from the cutting process.  I stuck in in the vice, put tension on it and whacked it a bunch with a soft-faced hammer to get it straight.

The service bulletin has been out for quite a while by now, but the instructions still say to do it the old way.  They just give you some parts and a set of instructions for fixing an already assembled wing.  Its fairly straightforward, but does require a bit of thinking.  The new aileron hinge design is SUPER strong.  Here's what it looks like when complete.



Next up, wing skins!

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