[bruceh]

Just reading ahead in the plans as I get ready to assemble the HS. I am wondering why the plans have you join the rear spars and doublers in the first step, then the last step has you finally assembling the HS-911 brackets and bearing. Don't you need to match drill the hinge bracket to the rear spar with a #12 drill bit? A test fit of the AN3 hardware with the spar and bracket is too tight. If I have to match drill after everything is assembled there is no way to deburr the interior of the doubler and spar holes.

 

[llavalle]

With the 2 plates riveted together, I don't see where a burr could go...

I drilled mine afterward and did not have any problems.

 

[Robert M]

Philippe is correct, no deburring is necessary there. Since the metal plates are so close, there shouldn't be any burrs between them.

 

[bruceh]

Thanks for the info. I went ahead and match drilled prior to assembly. It can't hurt. I can see that the hand holding in the instructions has already tapered off on the second page of the instructions!