Drilling the F-705 Canopy Angles   August 30th, 2010

These two brackets start out as 3/16″ aluminum angle.  Once they are cut the right length, they are match drilled to the top of the F-705 bulkhead.

After screwing one of these up, here is the correct procedure to match drill these angles.

  • Clamp the angle to the F-705F channel as shown below, but only drill the holes on the forward side of F-705F! (i.e., the holes facing up on the picture below)

  • Now insert the F-705D side channel and the F-705E doubler between the F-705F channel and the F-705G angle.  Cleco and clamp everything in place, and match drill the holes on the top side of the F-705F channel (the holes on the right face of the channel in the picture below)

The result is a bunch of nice holes.   If you forget to insert the side channel/doubler, you end up with misaligned holes on the top face of the angle (on the right if you look at the picture below).  At the same time, it is very cumbersome to try to align the top channel, side channel, doubler and angle all at once with no holes on the angle.

Finally, once all the holes are match drilled, you can cleco the angle and draw where the oval slot should be.  I started the slot by drilling two holes, and then used a dremel tool to give it the final shape.

This entry was posted on Monday, August 30th, 2010 at 4:53 pm and is filed under Bulkheads, Fuselage. You can follow any responses to this entry through the RSS 2.0 feed.Both comments and pings are currently closed.

No Responses