I just thought... But now it seems reasonable. So what you can basically do is try and take a 3mm balsa sheet or even a 5mm one and sandpaper it to a airfoil looking like to one from the Bixler and make it a heavy lifter airfoil. But with the low weight, It will just fly suuuuuper slow nice idea
That's what struck me the most was just how scale it looked! In fact, on climb-out it almost looked more like a 747 than an Airbus A310. So slow and smooth...That slow on such a good looking plane makes it look so much larger.