Gyrodyne DSN-1 / QH-50A

Powered by a single 72 HP Porsche engine, the DNS-1 was the droned version of Gyrodynes optimized XRON-1 Rotorcycle which had a 20 rotor diameter. The Navy ordered nine DNS-1 airframes [DS-1000 to DS-1008] under Contract NOas 59-0219-c, BASIC. These airframes were used for technical evaluation and systems development to test the Landing Assist Device (LAD); an aid to landing helicopters on rolling pitching ship decks.