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Nigel & Nicks RV-7
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Date: 5-4-2018
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Number of Hours: 4.00
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Manual Reference: DWG 3
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Brief Description: Horizontal Stabiliser Assembly - Rear Spar
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Use a file or Scotchbrite wheel to "break" the edges of the HS-609PP (See Sec E-E). Lay the HS-609PP rear spar reinforcement bars inside the HS-603PP spar channels and check to see that the faces rest against one another when the holes are aligned. If the bend of the channel tends to lift the edge of the bar, use a coarse Vixen file to round the edge of HS-609PP to fit. Round the ends of the HS-609PP bars as shown in Rear View.
Smooth the edges and surfaces of the HS-609PPs to a satin finish equivalent to that left by 400 grit wet/dry sandpaper, removing all the milling and file marks (See “Edge Finishing”, Section 5.2).
The pre-punched holes used to attach HS-603PP to HS-609PP are slightly undersized, and must be "final drilled" to the correct size. Cleco and drill every second or third hole, drill #30, then move the clecos and drill #30 all the remaining holes.
Carefully locate the holes that attach HS-708 to the rear spar assembly (it is the eighth hole from the end of HS-609PP) and enlarge it to #21 (See Rear View).
Cleco the HS-412PP and HS-413PP elevator hinge brackets to the rear spar assembly and run a #30 drill through all the holes.
There are two HS-411PP brackets, but only HS-411BPP is pre-punched for the VA-146 attach holes (See Exploded Iso View). Clamp HS-411APP and HS-411BPP around the VA-146 bearing and cleco the assembly to the spar.
Using HS-411BPP as a drill guide match drill and cleco the aft four VA-146 attach holes.
Remove the assembly from the spar and match drill the forward two VA-146 attach holes.
Deburr the parts, prime VA-146 if desired, then rivet them together (the –5 rivet is the correct length, see Section 5.4). This sort of one at a time priming makes having a spray can self etching primer nice.
Cleco the HS-411 assembly back to the spar. Drill/enlarge the bolt holes that will attach the HS-411 assembly to the spar to #12.
Mark all the parts in the rear spar assembly so they can be returned to their previous positions. Use a "Sharpie" pen or equivalen
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