SIFT Army Aviation Information Practice
Test-Graded A
A helicopter is - ANS-A type of rotorcraft
Wheels on _____ types of helicopters are _____ - ANS-Some, retractable
A pilot controls a helicopter using: - ANS-Pedals, a collective, throttle, cyclic
From a physics perspective, the _____ force is deemed to act through a helicopter's
_____ - ANS-Total weight, center of gravity
When a pilot banks a helicopter, causing it to turn, _____ - ANS-The machine's weight
increases
Helicopter turbine engines produce ___________ thrust per pound than piston engines
- ANS-More
The four main forces working on a helicopter are - ANS-Lift, weight, thrust, drag
Helicopters typically have between ___ and ___ main rotor blades - ANS-2 and 6
Depending on the type of helicopter, main rotor system components can include - ANS-
A stabilizer bar, upper/lower swashplates, counterweights, pitch horns, teeter/coning
hinges, blade grips, pitch/scissor links, control rods
The function of the flybar is - ANS-To decrease crosswind thrust on the blades and
enhance flight stability by keeping the bar stable as the rotor spins
Many helicopters have a horizontal stabilizer located _____ - ANS-On the tail boom
The purpose of the tail rotor is: - ANS-To produce an anti-torque force acting
perpendicular to the helicopter's longitudinal axis.
In the case of helicopters, lift is produced by _____ moving through the air at a speed
sufficient to create - ANS-Airfoils, a pressure differential
Thrust acts _____ to the aircraft's _____ - ANS-Parallel, longitudinal axis
Profile drag consists of - ANS-Profile drag is usually defined as the sum of form
drag(Shape of the object) and skin friction(imperfections)
Test-Graded A
A helicopter is - ANS-A type of rotorcraft
Wheels on _____ types of helicopters are _____ - ANS-Some, retractable
A pilot controls a helicopter using: - ANS-Pedals, a collective, throttle, cyclic
From a physics perspective, the _____ force is deemed to act through a helicopter's
_____ - ANS-Total weight, center of gravity
When a pilot banks a helicopter, causing it to turn, _____ - ANS-The machine's weight
increases
Helicopter turbine engines produce ___________ thrust per pound than piston engines
- ANS-More
The four main forces working on a helicopter are - ANS-Lift, weight, thrust, drag
Helicopters typically have between ___ and ___ main rotor blades - ANS-2 and 6
Depending on the type of helicopter, main rotor system components can include - ANS-
A stabilizer bar, upper/lower swashplates, counterweights, pitch horns, teeter/coning
hinges, blade grips, pitch/scissor links, control rods
The function of the flybar is - ANS-To decrease crosswind thrust on the blades and
enhance flight stability by keeping the bar stable as the rotor spins
Many helicopters have a horizontal stabilizer located _____ - ANS-On the tail boom
The purpose of the tail rotor is: - ANS-To produce an anti-torque force acting
perpendicular to the helicopter's longitudinal axis.
In the case of helicopters, lift is produced by _____ moving through the air at a speed
sufficient to create - ANS-Airfoils, a pressure differential
Thrust acts _____ to the aircraft's _____ - ANS-Parallel, longitudinal axis
Profile drag consists of - ANS-Profile drag is usually defined as the sum of form
drag(Shape of the object) and skin friction(imperfections)
