Thanks for the good summary! I knew there was a limit to scaling, didn't realize it was the fifth power... On the other hand, if you're just lifting the copter

Thanks for the good summary! I knew there was a limit to scaling, didn't realize it was the fifth power... On the other hand, if you're just lifting the copter itself and one person, it doesn't have to be the size of a full blown helicopter. Then again, its utility is limited then.