“Yeah, the Harrier can do this, and the B-22 in the U.S., which is a true transporter, can take it and the vertically. I think in the military, there’s a long history of recognizing the advantage of not needing a runway, but there are also big technical challenges if you make a vertical takeoff and landing aircraft because you need to carry more thrust from the engines than your own weight. A normal aircraft normally carries about 30% of its weight in terms of engine thrust, so you’re having four or five times more engine power onboard, and that is the challenge. Everything needs to be super-lightweight.”