National Geographic : 1950 Sep
© National Geographic Society 315 Ektaclhromci from '. S. Air Force Forerunner of a Possible New Type of Fighter Is This Radical Delta-winged Design Ordinary wings and tail give way to the eternal triangle in the Air Force's high-speed jet research plane, the Consolidated Vultee XF-92A. Test flights at Muroc, California, are reported to "show a lot of promise." Wings swept back at a 60-degree angle look more like vanes on an arrow than wings. Triangular shape increases strength. With no horizontal stabilizer on the fin, "elevons" in the wings give both elevator and aileron control.