I modified the 3D cub plans ever so slightly by cutting a curve into the top of the fuselage for the under-camber wing, extending the wing length to 31" and removing the ailerons. I built the under-camber wing by cold rolling the foam halves over a table edge to give them some curve. I placed a roll of duck tape under each wing tip for dihedral and then epoxied the wing halves together.
The Blu-Cub 3D called for two crutch pieces on either side of the fuselage, so for this plane I just glued two fuselage pieces together. Other than that the only major change was that I added a landing gear made from piano wire to this plane. Weight without battery was 4.5oz and with battery it comes to about 7oz. As you might imagine, this plane flies entirely different. It floats in for landings, has plenty of power to do loops, and it is a joy to fly. Flight times with my 800mah battery are around 15-20 minutes.
|Blu-Cub on Track|
|Blu Cub flexible motor mount|
|Blu Cub ready for take off|