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Michaels Web Site
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Date: 6-10-2012
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Number of Hours: 0.00
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Manual Reference: F02
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Brief Description: Wing Rigging #5
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Words of wisdom for this method of using drill guides in the wing blocks:
OIL THE GUIDES BEFORE YOU PUT THEM IN THE WING BLOCKS!!! We did not do that on the first pin and had a DEVIL of a time getting the damn thing out with a pair of vice grips and a LOT of elbow grease! When we oiled the second guide in the other wing blocks, it went in and out with relative ease.
On this page:
- Inserted the drill guide in the left wing blocks, until it hit the forward fuselage attach angle at the forward edge of the spar tunnel.
- With the guide in place, I drilled through the spar tunnel and the attach angle in a few seconds. The hole in the attach angle can be seen in photo #2.
This under-sized guide hole in the spar tunnel and attach angle are now perfectly centered on the 3/8" wing block holes, and can be updrilled after taking the wings out and putting them away.
- We did the same thing on the right hand side.
- Now we pulled out the drill guides and installed (WITH OIL!) new drill guides that were slightly shorter than the total thickness of the two wing blocks.
- Tha allows us to cleco the REAR spar tunnel assembly and the REAR fuselage attach angles in place.
- Photo #3: Now we used the new holes in the FORWARD attach angle and the FORWARD spar tunnel, with the drill guides inside the spar blocks, to back-drill through the REAR spar tunnel and REAR attach angle.
This again gives us under-sized guide holes in the spar tunnel and attach angle that are now perfectly centered on the 3/8" wing block holes, and can be updrilled after taking the wings out and putting them away.
- We removed the clecos and removed the REAR attach angles and REAR spar tunnel assembly.
- To get the temporary drill guides OUT of the spar blocks, we used a drill bit sized between 1/4" and 3/8" to make the hole in the FORWARD attach angle ONLY (do not drill into the spar block!). Now I used a 3/16" diameter bolt as a punch, to tap the drill guides out of the spar blocks.
NOW ITS' TIME TO PUT EVERYTHING
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Drill guide inserted into left wing blocks, from rear to front.
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The resulting under-sized (#13) hole through the FRONT attach angle.
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On the right side of the fuselage, looking front to rear, drilling the revese under-sized hole.
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