Study guides, Class notes & Summaries

Sift Aviationwhat is the preferred method of ground movement for helicopter on airports - correct answer air taxi what type of helicopter design uses a ducted fan in place of a tail rotor to cancel torque effect - correct answer the NOTAR how would high density altitude affect the performance of a helicopter - correct answer Performance would decrease due to low value of the air density which pitot static instrument makes use of both pitot and static preasure - correct answer airspeed i...

SIFT Section 3 Army Aviation Information what allows a helicopter to fly forward,backward, and laterally? - correct answer -helicopters are equipped with a source of thrust -an engine produces power and delivers it to overhead and tail rotor via one or more transmissions and drive shafts two types of helicopter engines - correct answer -piston -turbine (offers more thrust per pound) define fuselage - correct answer the main body of a helicopter or plane define cowling - correct a...

Sift Study Guide Army AviationWhich of these is one of the three types of drag that constitute total drag? - correct answer Parasite. The force that resists the movement of a helicopter through the air and is produced when lift is developed is called drag. Drag must be overcome by the engine to turn the rotor. Drag always acts parallel to the relative wind. Total drag is composed of three types of drag: Profile, induced, and parasite Which of the following is common to all turbine helicop...

SIFT Study Guide Practice Questions Army Aviation When generating lift, what should the pressure below the airfoil be in relation to the pressure above the airfoil? - correct answer greater than it what is the load factor of a 2000 pound helicopter that is currently experiencing an effective load of 4000 pounds? - correct answer 2 What type/types of drag increases as the speed increases? - correct answer parasitic drag and profile drag which of the following decreases upon an increase ...

SIFT Test (Army Aviation Information Practice Test)A helicopter is: A. A type of gyrocraft. B. A type of rotorcraft. C. A category of rotary-wing airplanes. D. A sub-group - correct answer B. A type of rotorcraft. Helicopter turbine engines produce ___________ thrust per pound than piston engines: A. less. B. the same. C. more. D. the same, but only after factoring n the effect of density altitude. - correct answer C. more. The main forces acting on a helicopter are: A...

SIFT Test Army Aviation InformationHelicopter structure - correct answer fuselage (body of aircraft), mast, rotor blades engine drives power up through mast to rotor blades main rotor generates thrust, tail rotor counteracts torque main rotor rotates counterclockwise (US, UK, Ger.) advantages of rotorcraft - correct answer rotor blades (produce lift w/o requiring helicopter to move forward) provide the ability to takeoff vertically, hover in one place, and take off/land in places tha...

SIFT Test Army Aviation InformationWhat part of a rotary-wing aircraft makes directional control possible? - correct answer the swashplate allows for the directions movement of the aircraft. Which if these US Army helicopters is classified as tandem rotors? - correct answer CH-47 What is the preferred method of ground movement for helicopters on airports? - correct answer Air taxi, enables the pilot to proceed at an optimum airspeed/altitude, minimize downwash effect, conserve fuel, and ex...

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