The MD 520N is one of just three helicopters – all manufactured by MD Helicopters, Inc. – to feature the exclusive NOTAR® system for anti-torque and directional control. By replacing conventional tail rotors with the NOTAR system, the margin of safety immediately increases for crew and aircraft, and the noise decreases; making it an ...

The MD Helicopters MD 500 series is an American family of light utility civilian and military helicopters. The MD 500 was developed from the Hughes 500, a civilian version of the US Army's OH-6A Cayuse/Loach. The series currently includes the MD 500E, MD 520N, and MD 530F. The MD 500 was initially produced by Hughes Helicopters as the Hughes ...

MD520N型直升机，是美国原麦克唐纳·道格拉斯公司（后并入 波音公司）研制的5座轻型通用无尾桨直升机。 1980年， 美国陆军 应用技术实验室和 美国国防高级研究计划局 与原休斯直升机公司（1985年8月27日并入麦克唐纳·道格拉斯公司）共同签订了一项价值为220万美元、为期24个月的合同，合同要求设计和制造一架无尾桨 直升机 （NOTAR）的原型机。 早在1975年，原休斯直升机公司就开始自己投资研究和发展无尾桨技术，并于1977-1978年期间开展了用反扭转力矩尾 …

The MD 520N is an agile and nimble helicopter that boasts a flight performance unparalleled by any other light twin in the world. It was designed to combine the maneuverability of single-engine helicopters with the speed, power, and efficiency of larger multi-engine models.

md 520n By replacing conventional tail rotors with the exclusive NOTAR system, the margin of safety immediately increases for crew and aircraft, and the noise decreases. Exclusive NOTAR® Anti-Torque System

The MD 520N is one of just three helicopters – all manufactured by MD Helicopters, Inc. – to feature the exclusive NOTAR® system for anti-torque and directional control. By replacing conventional tail rotors with the NOTAR® system, the margin of safety immediately increases for crew and aircraft, and the noise

The MD 520N turbine engine allows easy configuration conversion from a five-place personnel transport to a utility helicopter. The 450-shp Rolls-Royce Model 250-C20R/2 turbine-engine-powered MD 520N includes a fully articulated five-blade main rotor system and the no …

The MD 520N is one of just three helicopters – all manufactured by MD Helicopters, Inc. – to feature the exclusive NOTAR system for anti-torque and directional control. By replacing conventional tail rotors with the NOTAR system, the margin of safety immediately increases for crew and aircraft, and the noise decreases; making it an ...

ORLANDO, Florida, July 19, 2023 – MD Helicopters (MDH) – APSCON Booth #901 – has kicked off an STC project that will certify the use of a Rolls Royce 250-C30 engine in the MD 520N, which features MDH’s patented NOTAR tailboom.

In September 1992 a MD-520N set a Paris to London speed record of 1 hour 22 minutes 29 seconds. Certificated in more than 20 countries, the MD-520N is known as the Defender in its military guise, being developed for the US Army as the MH-6J.