Huge if true: - 450 miles per hour, range of over 4,500 miles - 18 to 25 miles per gallon (vs 2-3 mpg for jet) - per-hour flight cost of just $328 (vs $2100

Huge if true: - 450 miles per hour, range of over 4,500 miles - 18 to 25 miles per gallon (vs 2-3 mpg for jet) - per-hour flight cost of just $328 (vs $2100 for light jet)