SIFT - Army Aviation question n answers 2023 passed

SIFT - Army Aviation Three types of Rotor Systems - correct answer 1. Semirigid - composed of two blades that are rigidly mounted to the main rotor hub 2. Rigid - the blade roots are rigidly attached to the rotor hub 3. Fully articulated - allow each blade to lead/lag (move back and forth in plane), flap (move up and down about an invoiard mounted hinge), independent of the otherblades, and feather (rotate about the pitch axis to change lift) 3 Types of Approach - correct answer Normal: 7-12 @300-500 AGL Steep: 13-15 Shallow: 3-5 Manufacturer's Empty Weight (MEW) - correct answer Total weight of the aircraft as it was built. this includes the system operating components but does not include unusable fuel. before fluids, fuel or oil is inserted. Operating Empty Weight (OEW) - correct answer MEW plus the weight of the crew, fluids, unusable fuel, and the equipment required for flight. All-Up Weight (AUW) or Aircraft Gross Weight (AGW) - correct answer Is the aircraft weight at any given moment during flight. the AUW / AGW can decrease at any point during flight. Maximum Landing Weight (MLW) - correct answer Aircraft's weight limit for landing Maximum Zero Fuel Weight (MZFW) - correct answer Permissible weight of aircraft with its contents and unusable fuel, no usable fuel or fluids Maximum Takeoff Weight - correct answer The maximum allowable weight for takeoff. Maximum Ramp Weight (MRW) - correct answer The weight limit for an aircraft to taxi or be towed on the ground. Parasitic Drag - correct answer Created by the non-lifting portions of the helicopter, such as the fuselage, engine cowlings, hub, mast, landing gear, and external loads. Lowest drag at low speeds, increases to Highest drag at high speeds. Profile Drag - correct answer The drag created by the frictional resistance is the spinning airfoils. Middle drag at low speeds, only increases slightly as speed increases. Induced Drag - correct answer Generated by the airflow circulation around the wing as it creates lift. Highest drag at lower speeds, decreases to lowest at higher speeds.