SIFT - Army Aviation Exam with Accurate
Solutions
Three types of Rotor Systems - ANS-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 - ANS-Normal: 7-12 @300-500 AGL
Steep: 13-15
Shallow: 3-5
Manufacturer's Empty Weight (MEW) - ANS-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) - ANS-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) - ANS-Is the aircraft weight at any
given moment during flight. the AUW / AGW can decrease at any point during flight.
Maximum Landing Weight (MLW) - ANS-Aircraft's weight limit for landing
Maximum Zero Fuel Weight (MZFW) - ANS-Permissible weight of aircraft with its
contents and unusable fuel, no usable fuel or fluids
Maximum Takeoff Weight - ANS-The maximum allowable weight for takeoff.
Maximum Ramp Weight (MRW) - ANS-The weight limit for an aircraft to taxi or be towed
on the ground.
Parasitic Drag - ANS-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 - ANS-The drag created by the frictional resistance is the spinning airfoils.
