This small step is just the lower winglets at the trailing edge. What to do here? Simple, dig out the end foam and fill that area with flox. If the plane ever goes backwards I can at least have something hard for first contact. Glass to glass wasn’t really an option here.

Pic 1 is cleaning out the end a good half inch and sanding away the foam and micro. After cure I just rounded the edges a little but left a bit of a ‘boat tail’ No need for a razor’s edge here.

Pic 3 shows the angle at the bottom of the winglet relative to the rudder trailing edge. +10 degrees past the right angle. This works out pretty much parallel with the wing waterline and interestingly, to me anyway, this angle also matches some pics of a winglet that is tuffed in flight. What a coincidence.

So I’m really trying to make all this line up with whats going to happen in the air. The top of the rudder (that I cut a few days later) matches this angle too. If I’m right I’ll never know and if I got it wrong… same thing. I just didn’t go with multiple detachable winglets on this build so a few things get the best guess and application of theory and will remain unproven.

Slot cleaning

Flox filled

Another angle