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Builder:
  Bjorn Nilberg
Location:
  Katy, TX - USA
Aircraft:
  RV-7
Total Build Hours:
  1862
Web Site:
  http://www.mykitlog.com/N741BN/

Date:  04-19-2018
Number of Hours:  1.50
Short Description:  Elevator Horns 2

The elevator horns lower bolt (where the pushrod attaches) need to be drilled. I clamped the horizontal stabilizer upside down to the workbench and measured up the pilot hole position according to the drawing on the aft most elevator horn

I then drilled a #40 pilot hole, upsized to #30 and #12 with the step reamers and v-block.

With both elevators in neutral, I was prepared to make a spacer to clamp the horns together and provide alignment for the drill bit. I then discovered that the v-block fit perfectly between the horns, the tool gods must be pleased.

I clamped the drill block with a #12 in position between the horns and drilled the other hole on the horn.

After deburring, I experimented with washers to fill in the space between the rod end and the horns. It took about 7 AN960-10, so I think I'll make spacer out of some aluminum tubing.

I also have to clean up the corrosion on left horn and recoat.




Clamped ready for drilling other horn





7 washers to fill the void

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