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  2. Quad City Challenger - Wikipedia

    en.wikipedia.org/wiki/Quad_City_Challenger

    This model incorporates many revisions to the basic Challenger design, including a larger and re-shaped vertical fin, fiberglass wing tips and redesigned landing gear. Qualifies as a US Light sport aircraft, 110 reported completed and flown by the fall of 2011. [1] [8] [11] Challenger II LSS XL-65 Two seats in tandem, 29 ft (8.8 m).

  3. Tandem-rotor aircraft - Wikipedia

    en.wikipedia.org/wiki/Tandem-rotor_aircraft

    Tandem-rotor helicopters, however, use counter-rotating rotors, with each cancelling out the other's torque. Therefore, all of the power from the engines can be used for lift, whereas a single-rotor helicopter uses some of the engine power to counter the torque. [1] An alternative is to mount two rotors in a coaxial configuration.

  4. Bell Boeing Quad TiltRotor - Wikipedia

    en.wikipedia.org/wiki/Bell_Boeing_Quad_TiltRotor

    The Bell Boeing Quad TiltRotor (QTR) is a proposed four-rotor derivative of the Bell Boeing V-22 Osprey developed jointly by Bell Helicopter and Boeing.The concept is a contender in the U.S. Army's Joint Heavy Lift program (a part of Future Vertical Lift program).

  5. Tiltrotor - Wikipedia

    en.wikipedia.org/wiki/Tiltrotor

    Around 2005 [13] –2010, [14] Bell and Boeing teamed up again to perform a conceptual study of a larger Quad TiltRotor (QTR) for the US Army's Joint Heavy Lift (JHL) program. The QTR is a larger, four rotor version of the V-22 with two tandem wings sets of fixed wings and four tilting rotors.

  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. List of VTOL aircraft - Wikipedia

    en.wikipedia.org/wiki/List_of_VTOL_aircraft

    This is a list of fixed-wing aircraft capable of vertical take-off and landing arranged under manufacturer. The list excludes helicopters, including compound helicopters and gyrocopters, because they are assumed to have this capability. For more detail on subtypes of VTOL, see List of tiltrotor aircraft

  8. Excalibur Aircraft Excalibur - Wikipedia

    en.wikipedia.org/wiki/Excalibur_Aircraft_Excalibur

    The Excalibur was designed as "clone" [1] of the Quad City Challenger II aircraft. The company took the basic Challenger design and incorporated many changes, including mounting the engine upright allowing larger propellers and the Rotax gearbox to be mounted, lengthening the tailboom and enlarging the tail vertical surface to increase stability, shortening the ailerons and replacing control ...

  9. Doppelmayr USA - Wikipedia

    en.wikipedia.org/wiki/Doppelmayr_USA

    In 1996, Doppelmayr's European holding company purchased the ropeway department of Von Roll, a Swiss manufacturer which had been making lifts in North America since the mid-1980s. Von Roll owned Hall Ski-Lift, an American company that produced more than 400 lifts from 1960 to 1985. Doppelmayr now controlled all the spare parts sales for ...