SIFT Test Army Aviation Information question n answers graded A+ 2023

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 expedite movement from one point to another. What type of helicopter design uses a ducted fan in place of a tail rotor to cancel torque effect? - correct answer the NOTAR design uses a ducted fan to vector air out of the tail to cancel torque effect. Which aerodynamic force(s) must a rotary-wing aircraft balance in order to hover? - correct answer Weight, Lift, Thrust, & Drag How would high-density altitude affect the performance of a helicopter? - correct answer Performance would be decreased due to low value of the air density. If the airspeed indicator needle is in the yellow and approaching the red line during a maneuver, what would be the correct response? - correct answer Decrease airspeed, Approaching the red line means the aircraft is reaching the maximum airspeed for the aircraft. Which pitot-static instrument makes use of both pitot and static pressure? - correct answer Airspeed indicator What effect does the cyclic control have on a rotor system? - correct answer It alters the pitch of the main rotor blades individually and cyclically. The angle of attack (AOA) is the angle between - correct answer Airfoil chord line and the resultant relative wind. What item was developed to reduce compass reading errors? - correct answer The vertical card compass What effect is principally used to counteract main rotor torque with the NOTAR system used on the MD520N & MD-900 helicopters? - correct answer Coanda effect Which type of drag is caused by production of lift? - correct answer Induced Drag Risk management is composed of which four risk elements? - correct answer Pilot, aircraft, environment, and external pressures. What is the unit of measure for airspeed? - correct answer Knots What is the degree increment between the hash marks on the attitude indicator? - correct answer 30 degrees What three conditions are necessary for a helicopter to be in danger of a dynamic rollover? - correct answer Pivot point, rolling motion, and exceeding critical angle What are the three regions of a rotor in autorotation? - correct answer Driven, Driving, and Stall Empennage refers to the... - correct answer Tail section What is resultant relative wind? - correct answer Rotational relative wind modified by induced flow. The atmospheric pressure on the top surface of an airfoil decreases as the velocity of the air moving past it increases. This is an example of - correct answer Bernoulli's Principle