Georg completed his wing cores a few weeks ago and has already advanced quite a bit with building the various components into the fuselage. More on that later. Andi and I have been working hard to complete the other three sets of wing cores. On Saturday we put the first pair of them together, and they look really awesome. See the pictures below.

Note that the outer two segments will become the 4.28/15m winglet and will therefore be cut off. Already built into the wing are the sleeves for a wing-joiner for the winglets with a 5 degrees dihedral (see earlier post). In addition, the last segment of the winglet will also be separated and obtain a dihedral. The dihedral at the wing root and the first inner segment are already in the wing cores, so the pictures show the wings with only part of the “V”-shape that they will have in their final version. Next step is to fit the wings to the fuselage, then sand them and cover them in glass fiber. Only then can we cut off the winglets and build in the dihedral, before coating the wings in primer and then spray painting them, with lots of sanding in between still.

Over the weekend we completed the second pair, and at the end of this week we hope to have all sets of cores ready. Each underside takes around 3hrs of preparation to cut out and install the wing spars and cables, and prepare the carbon fibers. Putting it together and placing it in a vacuum bag takes almost another two hours, and we can only do one wing at a time (we don’t have more space and only one vacuum pump).