JDill
Member
The FT Viggen was my first EDF and it's been fun plane to fly. It's a great design and actually goes together fairly easily.
The one thing I haven't liked is the flat wing design. It's a big wing that, when made out of a single layer of foam-board, is weak and tends to warp. I even added some carbon fiber and still wasn't happy with it.
So I cut away the existing wing with the intent to mod the Viggen with a traditional built FT wing. Using the Viggen wing template I made the bottom of the wing, minus the wing tips and ailerons. Then using the template I made left and right wing tops with ailerons attached. The leading edges of each set (top and bottom) were beveled and joined with packing tape to form a double-bevel. A spar was added to each wing and I marked and scored bend lines on the underside of the top wings to contour them. Glue everything and fold them over. Just needed a little trimming for the fuselage to set down in between the wings. Oh, and the servo's needed to be moved higher so they were positioned above the new wing.
I really like the way it turned out. Much stronger, and straight! The new wing didn't even affect my battery position much to attain the proper CG. Painting and a re-maiden will take place in the spring.
The one thing I haven't liked is the flat wing design. It's a big wing that, when made out of a single layer of foam-board, is weak and tends to warp. I even added some carbon fiber and still wasn't happy with it.
So I cut away the existing wing with the intent to mod the Viggen with a traditional built FT wing. Using the Viggen wing template I made the bottom of the wing, minus the wing tips and ailerons. Then using the template I made left and right wing tops with ailerons attached. The leading edges of each set (top and bottom) were beveled and joined with packing tape to form a double-bevel. A spar was added to each wing and I marked and scored bend lines on the underside of the top wings to contour them. Glue everything and fold them over. Just needed a little trimming for the fuselage to set down in between the wings. Oh, and the servo's needed to be moved higher so they were positioned above the new wing.
I really like the way it turned out. Much stronger, and straight! The new wing didn't even affect my battery position much to attain the proper CG. Painting and a re-maiden will take place in the spring.