Answers
As far as helicopter vibrations go, there are two types. One of the two types of vibration can be
felt as a buzz, the other is felt as a thump or a beat. Match the type of vibration to the "feeling".
Thump or Beat:
Buzz: ✔️✔️Vertical vibration
High frequency vibration
There are two ways of correcting vibration that deals with the rotor blades. What are they?
✔️✔️Blade tracking and Blade balancing
Gyroscopic precession causes the resultant ultimate force to occur how many degrees from the
applied force?
A. 90 degrees in opposite direction of rotation
B. 90 degrees in direction of rotation
C. 180 degrees in opposite direction of rotation
D. 180 degrees in direction of rotation ✔️✔️90 degrees in direction of rotation
In the United States helicopter rotors turn --- and most European helicopter rotors turn ---.
✔️✔️counter-clockwise, clockwise
If a helicopter is hovering (no forward airspeed) is the speed of the rotor blade greater at the
TIP or HUB? ✔️✔️Tip
The earliest technique for rotor tracking was ---. ✔️✔️Flag tracking