SIFT - Army Aviation Exam Study Guide with Complete Solutions
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Course
SIFT
Institution
SIFT
SIFT - Army Aviation Exam Study Guide
with Complete Solutions
Three types of Rotor Systems - 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 l...
Maximum Landing Weight (MLW) - Answer✔✔-Aircraft's weight limit for landing
Maximum Zero Fuel Weight (MZFW) - Answer✔✔-Permissible weight of aircraft with its contents and
unusable fuel, no usable fuel or fluids
Maximum Takeoff Weight - Answer✔✔-The maximum allowable weight for takeoff.
Maximum Ramp Weight (MRW) - Answer✔✔-The weight limit for an aircraft to taxi or be towed on the
ground.
Parasitic Drag - 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 - 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 - Answer✔✔-Generated by the airflow circulation around the wing as it creates lift.
Highest drag at lower speeds, decreases to lowest at higher speeds.
4 forces of hovering - Answer✔✔-Weight, lift, thrust, drag in balance
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