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  2. Tandem-rotor aircraft - Wikipedia

    en.wikipedia.org/wiki/Tandem-rotor_aircraft

    Tandem-rotor helicopters have the advantage of being able to hold more weight with shorter blades, since there are two sets. However, the rear rotor works in the aerodynamic shadow of the front rotor, which reduces its efficiency. This loss can be minimized by increasing the distance between the two rotor hubs, and by elevating one hub over the ...

  3. Kaman HH-43 Huskie - Wikipedia

    en.wikipedia.org/wiki/Kaman_HH-43_Huskie

    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.

  4. Intermeshing-rotor helicopter - Wikipedia

    en.wikipedia.org/wiki/Intermeshing-rotor_helicopter

    An intermeshing-rotor helicopter (or synchropter) is a helicopter with a set of two main rotors turning in opposite directions, with each rotor mast mounted with a slight angle to the other, in a transversely symmetrical manner, so that the blades intermesh without colliding.

  5. Boeing CH-47 Chinook - Wikipedia

    en.wikipedia.org/wiki/Boeing_CH-47_Chinook

    The CH-47 is powered by two turboshaft engines, mounted on each side of the helicopter's rear pylon and connected to the rotors by drive shafts. Initial models were fitted with Lycoming T55 engines rated at 2,200 hp (1,600 kW) each.

  6. Boeing Vertol CH-46 Sea Knight - Wikipedia

    en.wikipedia.org/wiki/Boeing_Vertol_CH-46_Sea_Knight

    The Boeing Vertol CH-46 Sea Knight is a medium-lift tandem-rotor transport helicopter, furnished with a set of counter-rotating main rotors in a tandem-rotor configuration. It was typically powered by a pair of General Electric T58 turboshaft engines, which were mounted on each side of the rear rotor pedestal; power to the forward rotor was ...

  7. Helicopter rotor - Wikipedia

    en.wikipedia.org/wiki/Helicopter_rotor

    The number of rotors is also important, many helicopters have two rotors in a single line, and another configuration is 4 rotors. [22] An example of two-blade rotor is the Bell 212 , and four blade version of this helicopter is the Bell 412 . [ 23 ]

  8. Rotorfly R-30 - Wikipedia

    en.wikipedia.org/wiki/Rotorfly_R-30

    The Rotorfly R-30 helicopter is a coaxial helicopter with two two-blade fiberglass rotors. The control rods of the upper main rotor are located inside the shaft which reduces turbulence, It has been described as a hingeless teetering blade mount. [2] The aircraft claimed to be very quiet in general. [5]

  9. Transverse-rotor aircraft - Wikipedia

    en.wikipedia.org/wiki/Transverse-rotor_aircraft

    A transverse-rotor aircraft is an aircraft with two large horizontal rotor assemblies mounted side by side. Single-rotor helicopters (unicopters) need an additional tail rotor or tail exhaust to neutralize the reactional angular momentum produced by the main rotor.