Thanks for that. My head ran through 4%, thankfully all of us physics people use math people to go through our work to find the errors. The good news is that 2.2 pounds of rivets still make my point. If only I had a nickel for every time a math error was found in my writing…there’s a joke there for anybody who has spent a lot of time around physicists:
Let’s just assume the airplane is a perfect sphere…