The Kaman K-225 is an American experimental helicopter developed by Kaman Aircraft. One example was modified to become the world's first gas turbine -powered helicopter. The K-125 was Charles Kaman 's first helicopter, which utilized intermeshing rotors and Kaman's patented servo-flap stability control. [1] .

Kaman K-225是一款由 卡曼飛機公司 （ 英语 ： Kaman Corporation ） 研製的實驗直升機。 其改款K-5為世界上第一架由燃氣渦輪機驅動的直升機。

K-125是 查爾斯·卡曼 （ 英語 ： Charles Kaman ） 的第一架直升機，它採用了嚙合旋翼和卡曼獲得專利的伺服襟翼穩定性控制。 [1] K-125於1947年1月15日首飛。 K-190和K-225是K-125的改良版本，分別於1949年4月和7月首飛。美國海軍和美國海岸警衛隊分別購買了兩架和1架'K-225 ...

K-125是 查尔斯·卡曼 （ 英语 ： Charles Kaman ） 的第一架直升机，它采用了啮合旋翼和卡曼获得专利的伺服襟翼稳定性控制。 [1] K-125于1947年1月15日首飞。 K-190和K-225是K-125的改良版本，分别于1949年4月和7月首飞。美国海军和美国海岸警卫队分别购买了两架和1架'K-225 ...

The K-225 served as a prototype for the HTK, the first Kaman helicopter to be evaluated by the U.S. Navy. Kaman was the only U.S. company to mass produce helicopters that incorporated the intermeshing rotor system, a design which eliminated the need for an anti-torque tail rotor.

The Kaman K-225, the world's first helicopter with a turbine-driven transmission, represents the transition from piston engines that made a number of modern designs possible. Charles H. Kaman began the Kaman Aircraft Company in late 1945 to develop an intermeshing twin-rotor helicopter, known as a synchropter, for the civilian market.

The Kaman K-225 was an experimental helicopter developed by Kaman Aircraft. One was modified to become the world’s first gas turbine-powered helicopter. The K-125 was Charles Kaman’s first helicopter, which utilized intermeshing rotors and Kaman’s patented servo-flap stability control.[1]

Kaman K-225 “Mixmaster” (1950) The K-125 was Charles Kaman’s first helicopter, which utilized intermeshing rotors and Kaman’s patented servo-flap stability control. The K-125 first flew on 15 January 1947.The K-190 and K-225 were an improved versions of the K-125, which first flew in April and July 1949 respectively.

The K-225 was a two-place, single-engine helicopter using Kaman’s unique system of counter-rotating, intermeshing rotors (“synchropter”). Each rotor cancelled the torque reaction of the other, eliminating the need for a tail rotor. In a conventional single-rotor helicopter, up to 30% of the engine power is required to drive the tail rotor.

Kaman K-225 “Mixmaster” (1950) The K-125 was Charles Kaman’s first helicopter, which utilized intermeshing rotors and Kaman’s patented servo-flap stability control. The K-125 first flew on 15 January 1947.The