Today is Wings day. We have done all the stuff that’s easier with the wings off. So now it is time to attach the wings.
We decided to use the same method as the time we attached the wing for setting the angle of incidence. So we use the small saw horses with MDF plates and old seat cushions. This time the Wings are painted, so we need to be extra careful.
For the left wing we measure the distance to the first saw horse. We need enough room for the Pitot/AoA tube.
This time it is easier to insert the wing spar into the main bulk head, Probably because we are ‘experienced’. Also we need to take care of the bottom skin. The bottom skin of the fuselage slides over the skin of the wings.
Once the main wing spar has been inserted into the main bulk head, the aft spar needs to slide into the seat bulk head. There is not much leverage to get the aft spar in the bulk head. By gently wiggling the Wing we can slide it in.
With both spars installed and the skins correctly weaved, we can attach the forward wing bracket. It connects the fuel tank bracket to the fuselage. Now we need to connect the Fuel line, the return line, the vent line and the fuel level sender wire.
The last step (and by far the the hardest) is inserting all the 10 bolts on the inside that clamp the wing spar to the main bulk head. The bolts fit is really tight inside spars and it takes some time to get them all in.
Ok, next up the right wing, this is easier, because of even more ‘experience’. Also there are less connections and there is no Pitot tube. In order to make it easier to insert the wings, we have the crates under the tailwheel to set the plane (almost) level.
The Wing is not that heavy, picking it from the cradle, however there is very little space, so it’s hard to insert the wing, while holding it at the leading edge.
I made the holes in the wing ribs and fuselage skin for the electric wiring with a very tight fit. It makes it really hard push through the skins. It prevents vibrations during flight, but it’s horrible when the wing is just hanging there.
Now again inserting all the bolts, to secure the wing (spar) to the main bulkhead.
Now I can screw the nuts on and torque the nuts.
When the Wings are attached, we can lower the tailwheel to the ground.
Time: 6 Hours, Rivets: 0/0 (2021-09-19)
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