"Hi Adrian,
We are trying to make the software available outside the US and will let you know when it is.
With regards to your airfoil thickness question, this is a matter of sweep definition. Sweep is not actually a rotation about the normal axis.…"

"Hey Guys, Thanks for your comments.
We put this video together for people who don't have much experience designing - just to give them some basic places to start. You are all obviously more experienced and have great comments on how to improve the…"

"@Mostyn: I just uploaded Part 2. Let me know what you think. It was definitely interesting to look at the plots as a function of lift coefficient. You can find the video here:
https://youtu.be/v3BNCc6zdQA
Best,
Doug"

"@Justin - Thanks for the comment. You're right that these are very simple concepts. I hear of lots of guys using rules of thumb to design their small drones, and want to point out some of the basic ideas that govern the physics. Hopefully this helps…"

"@Mostyn: Good point. I failed to mention that in the video. I'll put together a "part 2" that compares the performance over a range of lift coefficients.
Yes, you can use different airfoils at the wing root and wing tip. MachUp assumes a linear…"

"@Martin: I just looked at the sectional Cl distribution along the wing, and as you suspected, it does show that it will tip stall. I plan to release a video soon on the effects of twist/washout, which could mitigate this issue for tapered wings.…"

"@Mark: Thanks. It was fun to put together.
I didn't quite get your question about calculating the sum of the lift. Each case had the same wing area, and each case was set to the same lift coefficient. So each wing I studied produced the same amount…"

"@Eli: We're working hard to get it open to designers world-wide. We believe it falls under US international trade regulations and are trying to successfully navigate the regulations. We'll let you know when it's finally available world-wide!"

"Hey guys,
Sam and I have talked a lot about how we can better serve the DIY community with MachUp. We're considering adding another license type for non-profit organizations and hobbyists that would be heavily discounted. But before we do, we'd like…"

"@Guy: I realize the geo restrictions seem a little odd. The US is really particular on what they allow us to export that could be used for weapon or military purposes. Unfortunately, this type of software appears to fall within these restrictions.…"

"@Andrew We've internally validated the code against other sources, but plan to add more public validation data as soon as we can. I realize Roskam is a good place to start and hope to get some results up there soon.
@Martin: I wish I had the rights…"