无尾桨直升机发展历程麦道直升机公司的前身休斯直升机公司,早在1975年就开始自筹资金进行无尾桨技术的发展研究,并于1977～1978年期间进行了飞行试验。试验是在一架改装后的OH-6A直升机上进行的,该机仍带有尾桨,只是在尾梁外加装了玻璃钢环量控制包皮,用一个普通风扇提供低压气流。首次试飞时环量控制尾梁提供了相当于尾桨25％推力的侧向力,证实了环量控制尾梁的可行性和有效性。 Development history of tail rotor-free helicopters The pioneer helicopter company, McDonnell Douglas Helicopters, started research on the development of tail rotor-free technology as early as 1975 and conducted flight tests between 1977 and 1978. The test was carried out on a modified OH-6A helicopter, which still had a tail rotor but was equipped with a FRP ring wrapper outside the tail boom and a low pressure airflow from a normal fan. The first test flight ring control tail boom provides a thrust equivalent to 25% of the tail rotor lateral force, confirmed the feasibility and effectiveness of ring control tail boom.