It was a full day today although it doesn't look like it. I'm waiting on some all aluminium pop rivets to secure the baffle in the tank and also some aluminium tube which will be welded through the tank to take the engine controls from the panel to the firewall. After a lot of sheet metal work recently I decided to get down to some welding and fabricate the brackets which are welded to the fuselage and bolt to the spar attach brackets on the wings. These are tricky little fittings as they must fit perfectly inside the spar attach brackets and some close quarters welding is needed. The front one was fabricated and welded to the fuselage in line with the front spar carry through tube. The rear one slots over the rear door post and will be welded to the upright together with the rear spar carry though once the correct position for the carry through is established. The requirement is to get the correct wing incidence and also to ensure that the flap torque tube clears the upper longeron. The torque tube clearance seems to be a generic problem with tailwinds with some builders having to compromise the wing incidence to get clearance. I'm going to be radical in setting this up by making a dummy root rib with a dummy flap torque tube and then using this to establish the best position of the spar attach brackets on the two spars and the best position of the rear carry through tube. Once this is done I will weld the rear bracket into place and then build the wing to fit the fuselage mounts
.
It was a full day today although it doesn't look like it. I'm waiting on some all aluminium pop rivets to secure the baffle in the tank and also some aluminium tube which will be welded through the tank to take the engine controls from the panel to the firewall. After a lot of sheet metal work recently I decided to get down to some welding and fabricate the brackets which are welded to the fuselage and bolt to the spar attach brackets on the wings. These are tricky little fittings as they must fit perfectly inside the spar attach brackets and some close quarters welding is needed. The front one was fabricated and welded to the fuselage in line with the front spar carry through tube. The rear one slots over the rear door post and will be welded to the upright together with the rear spar carry though once the correct position for the carry through is established. The requirement is to get the correct wing incidence and also to ensure that the flap torque tube clears the upper longeron. The torque tube clearance seems to be a generic problem with tailwinds with some builders having to compromise the wing incidence to get clearance. I'm going to be radical in setting this up by making a dummy root rib with a dummy flap torque tube and then using this to establish the best position of the spar attach brackets on the two spars and the best position of the rear carry through tube. Once this is done I will weld the rear bracket into place and then build the wing to fit the fuselage mounts
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