> had a maximum cruising speed of at least 450 miles per hour and a range of over 4,500 miles Given the shape of the airplane, I'd guess the 4,500 miles range

> had a maximum cruising speed of at least 450 miles per hour and a range of over 4,500 miles Given the shape of the airplane, I'd guess the 4,500 miles range is not at 450 miles per hour, but much much less. Also, it needs to fly very high, so you need to correct the time it takes to travel with this with the longer take off and landing times. It wouldn't surprise me if the "effective" velocity of this plane for long distances was more like 200 mph. I hope I'm wrong.