Thanks, all!
Nigel! I used the whittling only for to achieve a genreral profile shape. I used about 0,8mm thick clear plastic sheet from a package for brushes. I cut them to the right shape, then scraped the edges with a knife to get a crude wing profile shape. Then I used different kind of sanding papers to make the profile more even and smooth. The actual wing surfaces I did from a much thinner plastic (the stuff that was used for printing images and text for overhead projectors in the school? the stone age powerpoint
, onto which I scored the ribs from the inner side with a ballpoint pen on a softer cardboard surface. In the photos you can see that the inner core is only up to the 2nd back spar, aft of that it is just the upper surface plastic against the lower. All glued together with contact glue.
At first I tried to make the core bits curved with a hot water treatment, but the plastic reacted badly to it, producing a wavy edge. In the end I just scored them with several lines running lenghtwise, to the underside. I used a fork handle and a lots of pressure, on a soft surface (a newspaper, on this case). Eventually, the cores had the right wing profile curvature.
Cheers, Skyhook
