Folding propeller to small electric gliderPrint the "fork" and 2 similar blades. Blades has quite a lot overhang, it could cause problems. You can use small bolt and nuts (maybe washer) to join them. I used 3mm filament and glued it to fork with ABS glue (acetone+ABS). I tested with small geared motor, and least it made some wind ;-) Haven't tested it with plane, I'll try it with small (120cm) Graupner Discus soon.