theory of flight Flashcards
when a force is applied on a spinning object, the result will be felt at a maximum 90 degrees after force input. this is known as what?
gyroscopic precession
What does the collective control do in a helicopter?
controls movement around the vertical axis
The difference in lift between advancing and retreating side of rotor disk caused by different blade speed when moving in flight is known as what?
dissymmetry of lift
When does blade tip stall occur and how is it prevented?
When the airspeed is high, prevented by flying slower than normal
Changing the radius of the rotor blades to keep angular momentum the same is described as what?
coriolis effect
When air vortices occur on the inside of the blade what is this known as?
vortex ring state
The angle that blades bend upwards in flight is known as what?
coning angle
when rotor RPM is too low and the pilot cannot regain thrust this is known as what?
over pitching
when a helicopter lands on one ski and shakes causing vibrations this is known as what?
ground resonance
when do blades reach maximum deflection after an input has been made?
90 degrees after input
What is the name given to the point of the blade that attaches to the rotor hub assembly?
root of blade
How is droop of static blades stopped on start up?
droop stop
which part of the blade is moving the fastest when in operation?
blade tips
how is blade tip path (dynamic balancing) checked for on helicopters?
colour coding