About time.
Jets are only fuel efficient at specific airspeeds. Jet turbines for sub 100 mph travel was always going to be a loser.
A big two-stroke piston engine screaming it’s head off isn’t going to be very fuel efficient either.
I don’t think fuel efficiency is the point. I’m not sure what the point is. A bit of slightly dangerous fun for a handful of very wealthy people?
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About time.
Jets are only fuel efficient at specific airspeeds. Jet turbines for sub 100 mph travel was always going to be a loser.
A big two-stroke piston engine screaming it’s head off isn’t going to be very fuel efficient either.
I don’t think fuel efficiency is the point. I’m not sure what the point is. A bit of slightly dangerous fun for a handful of very wealthy people?