Sift Study Guide Army Aviation fully solved 2023 passed

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 helicopters, but is only on some piston powered helicopters? - correct answer Governor Governors are common on all turbine helicopters (as it is a function of the fuel control system of the turbine engine), and used on some piston powered helicopters Where is the horizontal reference datum located? - correct answer It varies by helicopter The horizontal reference datum is an imaginary vertical plane or point, arbitrarily fixed somewhere along the longitude axis of the helicopter, from which all horizontal distances are measured for wight and balance purposes. there is no feed rule for its location. it is established by the helicopter manufactureer The _______ position relative to the horizon determines the helicopters travel and attitude - correct answer Cyclic The cyclic position relative to the horizon determines the helicopters travel and attitude When training for a rapid deceleration, in most helicopters the entry speed should be approximately? - correct answer 45 knots Training maneuvers for rapid deceleration should always be don into the wind. after leveling off at an altitude between 25-40 feet, depending upon the manufacturers recommendations, accelerate to the desired entry speed, which is approximately 45 knots for most training helicopters Which of the following has been the army primary training helicopter since 1993? - correct answer BELL TH-67 Which of the following occurs when the tail rotor becomes more aerodynamically efficient during the transition from hover to forward flight? - correct answer Translational thrust Translational thrust occurs when the tail rotor becomes more aerodynamically effiencent during the transition from however to froward flight. as the tail rotor works in progressively less turbulent air, this improved effiency produces more anti torque thrust, causing the nose of the aircraft to yaw left (with a main rotor turning counterclockwise) and foes the pilot to apply the right pedal (decreasing the AOA in the tail rotor blades) in respons