The incidences on a pattern airplane play a major part in its success as a precision aerobatics weapon!

The Ultra-R/C Evolution canopy-line appears to be parallel to the centerline of the fuselage so it can be used as a reasonable reference point. The pre-set wing-incidence was parallel to the canopy line. Both wings were found to be at the same angle of incidence. I set the stab with a 1/4 of a degree of negative incidence using a slot in the attachment tabs. This is what I have been using on the last half a dozen of my pattern planes. I can set it back to zero if I don’t get what I want in the air. - Personal choice again.

A tip when fitting the epoxy-board tabs is to feed thread through the slot/hole in the wing root-rib. Then loop it through the screw hole in the tab. When you have applied the epoxy you can easily pull the tab through the slot. This makes the task a lot less fiddly, messy and more “certain”.

The hole/slot in the root-rib for the tab was wider than the thickness of the tab. To be line up the wing-retaining-tabs correctly, make sure that you position the tabs on the bottom edge of this hole. I used some 1/2” x 3/16 x 1/16” scrap ply pieces to hold/wedge the tabs in the correct position and CA'd them later.

The wing is still only temporarily held in the forward position. I will move the wing later if I need help to get the desired CG. Meanwhile the alignment is complete and we can get back to assembly, especially if it keeps raining.

Regards,

Eric.