in less than half an hour. takes that long to get from the 30th to the first floor. but accord dog the plane s designers they can do this. we re at bat 4 to look at this. looks like a jet. just a concept right now but called the screamer.js. a cool name. a special spelling on the bottom. so modern. designers say it can fly faster than mach 10. ten times the speed of sound and ten times faster than the concorde that flew at mach 2. now designers of the new jet say it would use an electromagnet are yic rail gun to shoot it sunny sky, then use roberts to get to mach 4 and then a scram jet engine to get to full speed. the engines are being developed in the u.s. and china and they use hydrogen come pressed oxygen, instead of taking ox of