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Aircraft Technic
#1. Helicopters were developed and built during the first half-century of flight, with the .............. being the first operational helicopter in 1936.
#2. Most helicopters produce torque created by aerodynamic drag, which must be responded with an opposing torque. .................... pushes or pulls against the tail to counter the torque effect, and this has become the most common configuration for helicopter design.
#3. A helicopter has four flight control inputs. The ............... is usually located between the pilot's legs which is similar to a joystick.
#4. The collective is located on the left side of the pilot's seat with a settable friction control to prevent inadvertent movement. The collective changes the ................... of all the main rotor blades collectively (i.e. all at the same time) and independently of their position.
#5. ................... are two counter-rotating rotors with one mounted behind the other.
#6. ................................ are pair of counter-rotating rotors transversely mounted at the ends of fixed wings or outrigger structures.
#7. .................. are two counter-rotating rotors mounted one above the other with the same axis.
#8. McDonnell Douglas developed the ................... system, which eliminates having any rotating parts out in the open. The system uses a variable pitch ducted fan driven by the helicopter's powerplant
#9. ...................... are also more reliable than piston engines, especially when producing the sustained high levels of power required by a helicopter.
#10. ................., a French bicycle maker, is credited with inventing the helicopter in 1907. His invention is the first helicopter as we know it today, and it managed to lift off the ground about 1 foot, for about 20 seconds.
