The Sabrewing team is now building the first full-scale prototype of the Rhaegal B aircraft, which is expected to carry a 5,400-pound payload when operated in VTOL mode, rising to 10,000 pounds for a conventional takeoff from a 300-foot runway. … Based on extensive tests with a smaller Rhaegal A technology demonstrator, Sabrewing’s engineers have decided to use a pair of 1,400- to 2,000-hp Ardiden 3 engines for the B model in place of Safran’s less powerful Ariel 2E turboshaft.