Box Fly 20- electric build

[Frank v B]

How I align the wing and tail feathers.

Approach:
Step 1:  attach the wing to the fuse.  Measure from each wingtip to the back of the fuse.  Make sure both distances are equal. Mark the centre line.
- drill the wing for the bolt (I used two).  Drilled into the fuse's ply plate and tapped it for two 12-24 nylon bolts.
- adjust the wing saddle until the fuse sits upright on the wing.
Step 2:  slip the stab/elevator in place.  Measure that it is in the centre (equal sized stab on either side of the fuse) and from the stab tips to a point in the centre of the fuse (I used the cockpit front panel). Remove the covering from the centre of the stab top and bottom (photo 162) so the glue joint is balsa to balsa and not Monokote. Note photo 163- I slipped a toothpick between the stab and fuse to align it with the wing. (eyeball measurement, green arrow photo 163)
Step 3: install the fin/rudder 90 degrees to the stab.  I actually tape a right angle triangle to hold it while the glue dries.

Trick- when a fuse pinches into a point at the back, I slide the stab backwards in the slot about 1/4" (green arrow photo 161) and cut the covering with a sharp #11 blade on both sides of the fuse, top and bottom.  This is so that when it is finally glued in, the fuse sides will completely cover the edge of the covering (top and bottom).

The fin/rudder happens tomorrow.

Frank