| I started working on the wings this weekend. I did some research online, and found that fir is a good substitute for spruce. It’s a little heavier but it’s also a little stronger. But best of all, it’s available at the lumber yard. I ripped the spars to size on the table saw, and shaped the ends on the band saw. I drilled for all the brackets and cut the slots for the hinges. (I’m using regular hinges for the ailerons since they don’t show). The leading edge is 3/16 carbon fiber tube and the trailing edge is 1/16x1/2 carbon fiber sheet.
I routered out the area between the ribs 1/8” on both sides of the spars. This dropped 28 grams on the front spar and 21 grams on the rear. That’s almost ½ lb for the four wing panels. It was well worth the extra work.
Steve |