MK2 Wing

The MK2 wing was designed to carry 2 rows of Sunpower C60 cells. This wing used a KF (Kline–Fogleman) airfoil, an airfoil built out of flat steps that create vortexes, affectively mimicking the shape of a more traditional airfoil. The solar cells can sit behind these steps in order to not need a covering material. I got this idea from rctestflight on Youtube.

First sketch of MK2 wing, as well as the basic idea for MK2. You can see the KF steps and a dashed line to estimate the vortex from the steps.

Pathfinder wing with square carbon spar, later replaced with arrow-shafts. You can see how the leading edge is bent.

The wing was assembled all in one piece, and then the carbon spar was glued in. The spar is made out of carbon arrow-shafts, and sections of carbon tent pole were used to attach different sections together and to create a pin system so the wing tips could be removed easily for transport. The ailerons are the outer 20 inches of the bottom KF step, so they can also be covered in cells.