Now that the fuselage pressure test has been run successfully, the focus moves to constructing the actual wings. We won’t be doing a destructive test on the wings, so the ones we are building now are the ones that are going to fly to 90,000 feet. (Or at least, they will fly a lot higher than the Perlan 1 glider flew.)
The mold for the main spars is huge: nearly 40 feet (12m) long. Remember this is only the main wing panels and doesn’t include the wingtips – they have separate molds.