bad news first devcad exports only as STL. I tried every thing to import it into every thing on the software market. No way, to many triangles. My english is not good enough to explain this problem. For all other guys reading this thread a quick and dirty explantion. Your construct a 3d ball in a software. To get a printer printing this ball you have to convert it into a stl file. The software puts a mesh of thound's triangles around this ball. The more triangles the higher the printing resolution, the bigger the file. This works only in one direction without problems. *step->stl, but not the other way around.
Tom, if you like to add holes or plates for mounting, you need to upload the file into tinkercad. Have fun over there
It took me days to understand this. It looks more like something made for kids then a serious platform. But everything can be done and it is very percise. After you have downloaded the file you nee netfabb to inspect and repair it. In 50% you have mesh errors.
This -1.8° twist sounds a lot to me. Mine have less then -1° I guess, when the tip comes off the water, you gonna fall anyway, because the the air will be sucked down all the way. All those high tech profiles are laminar profiles. When you fly with a glider in the rain you will find rain drops on the wing. No matter how fast you fly, the drops remain. Those drops disturb the performance highly. The drops are in the laminar area. You will get rid of them only if you manage the glider back into the sun, not with flying faster. From knowing to guessing, if you have such an amount of twist you carry a totall of 100mm wingarea that does not do anything then producing drag and doubtless no lift.
Quick and dirty again for those guys and galls not to much into arerodynamics. Take you car for a ride, open the window. Drive 50km/hour put your hand out horizontaly. When you turn your hand negative you feel a force bending your hand to the road. AoA positive your hand tends to the sky. The faster you go, the bigger the forces. I would say, as little twist as possible gets the max performance out of a wing. There is also a static problem. High performance profiles are thin, around 7-8% thick. If you have a lot of twist, the water tries to put torque forces on the tip. The faster you go the bigger the the torque.