The build thread of the big DG500 continues, this post is about building the brute wing joiner out of carbon tows and epoxy. This method can be used for smaller wing joiners also.
The design differs from the joiner that I used on the Ventus which was round 19mm dia and about 75 x 60k carbon tows went into the mould. The advantage of a round joiner and tube is the ability to adjust the incedence of each wing and line them up accurately (I check the trailing edge).
On this joiner I decided to go for something much stronger and more blade shaped as the rigidety is required in the verticle plain. The joiner boxes will be made around the joiner and these continue well into the wing forming an integrated spar/shear webs as a box structure.
The airfoil is thick enough to accomodate a 40 mm high joiner and the outer joiner box.
This method will require carefull alignment of the wings to the fuselage.