Radian upper wing joiner

thingiverse

The Radian and Radian Pro are fantastic gliders but suffer from one significant drawback: the wing joiner screws from below instead of above, which means you must flip the model over at the field. If you don't have a stand, you risk damaging the rudder or elevator. This section requires some minor surgery, but it's not too challenging to install. The hardest part is removing the stock plastic joiner. I applied rubbing alcohol around the edge of the stock plastic joiner and pried it out with a flathead screwdriver. The adhesive they use is quite rubbery but does come loose. You'll also need to remove the stock plastic parts that the screw threads into. I relocated these to the bottom, and I recommend drilling a small hole on the other side so you can use screws as long as you prefer. Next, slice about 1-2mm of foam off the top slot so the new joiner sits flush. Use the wing as a guide and mark the slot on the stock joiner, then use a Dremel to cut a roughly 3mm deep slot on the top so the new joiner can sit inside. The interior cut needs to be at an angle because I added a stress relief fillet to the new joiner. Use the stock joiner as a guide when cutting the foam on the Radian. I suggest using low-temperature hot glue to secure the new joiner in place because you can remove it by applying a few drops of rubbing alcohol. If you want to take this even further, it's relatively easy to create a channel through the foam so you can plug the wires into the top. You'll never have to flip the model over again.