31. The delta wing is a triangle shape which may be used for a number of reasons. 32. Convair would also use a delta wing design in the Mach 2 class Convair B-58 Hustler bomber. 33. It was a double-delta wing single-engine fighter. 34. It was the first British-designed delta wing . 35. A model airplane that he built with a delta wing won a competition in his self-design class. 36. Several scale aircraft, designated Avro 707, were produced to test and refine the delta wing design principles. 37. The aircraft is a tandem two-seater of composite construction with a delta wing and a canard foreplane. 38. They redesigned the missile with a delta wing at the extreme rear, and canards at the nose. 39. The Hound Dog already had a low head-on radar cross-section because of its highly swept delta wings . 40. Two engines were located under the wing and two on the tips of its shoulder-mounted, truncated delta wings .