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Intermeshing rotored helicopters have high stability and powerful lifting capability. The latest Kaman K-MAX model is a dedicated sky-crane design used for construction work, and has been modified for trials by the USMC as an optionally-unmanned cargo transporter. Unmanned aerial vehicles with intermeshing rotors have also been flown. [2]
The Kaman HH-43 Huskie is a helicopter developed and produced by the American rotorcraft manufacturer Kaman Aircraft. [2] It is perhaps most distinctive for its use of twin intermeshing rotors, having been largely designed by the German aeronautical engineer Anton Flettner.
The Kaman K-MAX (company designation K-1200) is a helicopter with intermeshing rotors (synchropter) designed and produced by the American manufacturer Kaman Aircraft. Developed during the 1980s and 1990s, the K-MAX builds on the work of the German aeronautical engineer Anton Flettner .
Intermeshing twin rotors of a Kaman K-Max Video of K-Max helicopter in flight, showing the meshing main rotors in motion. Intermeshing rotors on a helicopter are a set of two rotors turning in opposite directions with each rotor mast mounted on the helicopter with a slight angle to the other so that the blades intermesh without colliding.
The design of the Abeille was directed by René Dorand at the helicopter division of SNCAC. An intermeshing rotor layout was chosen instead of a tail rotor design, following the examples of the 1939 Flettner Fl 265 and the Kellet XR-8 of 1944. [1] Its twin, two blade rotors were driven by shafts which leaned out of the fuselage side-by-side ...
The Fl 282 Kolibri was an improved version of the Flettner Fl 265 announced in July 1940, which pioneered the same intermeshing rotor configuration that the Kolibri used. It had a 7.7 litre displacement, seven-cylinder Siemens-Halske Sh 14 radial engine of 110–120 kW (150–160 hp) mounted in the center of the fuselage, with a transmission mounted on the front of the engine from which a ...
In January 1947, the Kaman K-125 helicopter first flew. It utilized intermeshing rotors and Kaman's patented servo-flap rotor control. [2] The Kaman K-225, first flown in 1951, also used intermeshing rotors with servo-flap control and was the world's first helicopter to be powered by a gas turbine. [2]
Main rotor diameter: 2 × 12.3 m (40 ft 4 in) Main rotor area: 237.6 m 2 (2,558 sq ft) total area; Performance. Maximum speed: 140 km/h (87 mph, 76 kn) at sea level; Range: 300 km (190 mi, 160 nmi) Service ceiling: 4,100 m (13,500 ft) Flettner Fl 265 in scale of 1 : 4,6 as shown at the Helicopter Museum of Bückeburg