jet4dUnit: 28.5 V DC GPU Model: JetEx-4D Manufacturer: Hobart AC Hobart Alternator Output, 28.5 VDC, 600 amp continuous Peak Start Current capacity 2000 amps Adjustable soft start currentThe Douglas F4D Skyray (later redesnated F-6 Skyray) is an American carrier-based supersonic fhterinterceptor desned and produced by the Douglas Aircraft Company.It was the first naval fhter to exceed the speed of sound in