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Nigel & Nicks RV-7
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Date:  9-18-2019
Number of Hours:  6.00
Manual Reference:  DWG 27A
Brief Description:  FItting the Vertical Stabiliser to Fuselage

Temporarily clamp the F-781 attach plate to the forward spar of the horizontal stabilizer. Trim the VS-702 front spar as shown on DWG 27A.

-> Not sure why this was not done on the building of the VS - but seems to make sense when everything comes together.

Clamp the rear spar of the vertical stabilizer to the back of the F-712 bulkhead, centering it in the bulkhead. Set the height using the dimension shown between the longeron and the hinge bracket.

Take measurements from the tip of the vertical stabilizer to both tips of the horizontal. Adjust the vertical stabilizer until the measurements are equal and the stabilizer is truly vertical.

-> this is aligned to 1/32 left/right. Spent alot of time making sure this was really well aligned. Happy I did.

Drill the bolt holes through the stabilizer and the F-712D Up Elevator Stop. Install bolts temporarily.
Place a straight edge along the back of the vertical stabilizer hinge brackets. The hingeline must remain straight, so hold the straight edge there and double check while clamping the vertical stabilizer front spar to the F-781 attach plate. If the rear spar bends aft at the top when the front spar is clamped, the vertical spar may be mounted on the rear of the F-781 plate. If necessary, you can make a shim to put between the F-781 and the vertical stabilizer spar. If the rear spar bends forward, make a shim to go between the F-781 and the front spar of the vertical stabilizer. Note that the F-781 has a joggle built into it that will offset the front of the vertical stabilizer slightly to the left. Proper offset places the bottom of the leading edge of the vertical stabilizer ΒΌ inch to the left of the fuselage centerline.

When the vertical stabilizer is properly aligned, drill the front spar to the F-781, using the pre-punched holes as guides.

NOTE that because the stabilizer is offset, the rear spar no longer fits flush against the F-712D angle. Use a single washer, superglued to the forward face of the spar, as a spacer. See View A-A, DWG.
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Aligned VS Vertically

Aligned VS Vertically

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VS offset to CL - 1/2

VS offset to CL - 1/2"

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