It existed but was not adopted. In fact two countries worked on similar ideas. This one had maximum speed of 500 feet per second, with an internal temperature of 3500 deg F producing 1200 psi at the jets allowing a turn of 400 deg per sec. I can't seem to find dimensions, but on the basis of certain structures its diameter would be about 2 ft.
So what more can I say? I've really given it away now :whistle: