Identifying left/right and top/bottom is important on these. I marked on tape to make it hard to mess up.
As if those huge spars didn't seem long enough, the first thing you do is make them longer. Match drill four doublers for each spar into the spar extension:
Clamp some J-Channel to the spar flanges and drill a bunch of holes into it. You don't end up attaching the J-Channel to the spars, this step is just to use the spar as a drill template. Pay VERY close attention to the plans when they tell you which holes to skip. The pattern changes a few holes away from the access hole nutplates. Figure out which holes they are talking about and tape them off.
I skipped around this chapter a bit to get all the pieces that need priming done at once. The extruded pieces are the wing tiedown points. They get drilled and tapped to accept eye bolts then match-drilled to the spars.
Here is the spar extension riveted. First wing rivets! Building juice optional:
The majority of the work on this chapter is in countersinking all those spar flange holes. There's a ton of them!
For the nutplate countersinks, the plans specify a maximum size for the top and bottom of the countersunk hole. I'd say an accurate measurement is mandatory here. On the tank attach nutplates, my skins weren't quite flush with the spar flange, but it was real close. Research showed this was OK.
The wing tiedown blocks riveted and bolted:
Aileron actuation brackets on the back side
As if those huge spars didn't seem long enough, the first thing you do is make them longer. Match drill four doublers for each spar into the spar extension:
Clamp some J-Channel to the spar flanges and drill a bunch of holes into it. You don't end up attaching the J-Channel to the spars, this step is just to use the spar as a drill template. Pay VERY close attention to the plans when they tell you which holes to skip. The pattern changes a few holes away from the access hole nutplates. Figure out which holes they are talking about and tape them off.
I skipped around this chapter a bit to get all the pieces that need priming done at once. The extruded pieces are the wing tiedown points. They get drilled and tapped to accept eye bolts then match-drilled to the spars.
Here is the spar extension riveted. First wing rivets! Building juice optional:
The majority of the work on this chapter is in countersinking all those spar flange holes. There's a ton of them!
For the nutplate countersinks, the plans specify a maximum size for the top and bottom of the countersunk hole. I'd say an accurate measurement is mandatory here. On the tank attach nutplates, my skins weren't quite flush with the spar flange, but it was real close. Research showed this was OK.
The wing tiedown blocks riveted and bolted:
Aileron actuation brackets on the back side
