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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]
As there is a low rotor clearance at the aircraft front, it is approached from the rear when the rotors are turning. Due to the limitations of the Ka-26, USSR and Romania agreed under the Comecon trade to build a single-turboshaft engine version, the Kamov Ka-126 , with better aerodynamics and range.
This category is for helicopters whose rotors were driven by piston engines mounted at the ends of the rotor blades. Pages in category "Tipmotor-powered helicopters" The following 2 pages are in this category, out of 2 total.
A manned multirotor helicopter that was flying in the 2010s had 18 electrically powered rotors; the single seat aircraft is powered by batteries. [36] The first aerobatic manned drone, as this type of electrically powered multi-rotor helicopter is known, had 12 rotors and could carry 1-2 people. [37]
The Exec 90 was developed in the early 1990s, it was, at the time, the only piston-powered helicopter to utilize an asymmetrical airfoil for improved autorotation characteristics and safety. In 1994, a fuel injection system with electronic ignition, and FADEC was added to the Exec 90, producing the Exec 162F.
Flying controls all act on the co-axial rotors with pitch, roll and collective similar to a conventional single rotor helicopter. Yaw was through differential collective which has a secondary effect of torque, an automatic mixer box ensured that total lift on the rotors remained constant during yaw maneuvers, to improve handling during deck ...
A Bell 47 helicopter, an early example of a powered rotorcraft. A rotary-wing aircraft, rotorwing aircraft or rotorcraft is a heavier-than-air aircraft with rotary wings that spin around a vertical mast to generate lift. The assembly of several rotor blades mounted on a single mast is referred to as a rotor.
The success of the XH-44 caught the attention of Henry J. Kaiser, who funded further development of Hiller's rotor system. [2] Hiller donated the XH-44 to the Smithsonian National Air and Space Museum in 1953. [4] The helicopter was restored in 1974, and in 1997 it was lent back to Hiller and displayed at the Hiller Aviation Museum. [4]