What is Newton's third law?
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For every action there is an equal and opposite reaction
The air deflected down also produces and upward/lifting reaction.
What is the height/velocity diagram?
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A height/velocity (H/V) diagram, published by the manufacturer for each
model of helicopter, depicts the critical combinations of airspeed and
altitude should an engine failure occur.
,What is translating tendency?
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The tendency of the helicopter to drift in the direction of tail rotor thrust (to
the right).
While cruising, it is less significant because airflow is more horizontal
What is coning?
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An upward sweep of rotor blades as a result of lift and centrifugal force.
What performance characteristics will be adversely affected when an aircraft has
been overloaded?
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Longer takeoff run, both the rate and angle of climb will be reduced, the
service ceiling will be lowered, the cruising speed will be reduced, the
cruising range will be shortened, maneuverability will be decreased, a
longer running landing will be required because the landing speed will be
higher, excessive loads will be imposed on the structure- especially the
landing gear
What is the center of pressure?
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the imaginary point on the chord line where the resultants of all
aerodynamic forces are considered to be concentrated.
This is why the helicopter flaps, feathers, leads, and lags
What are some considerations for a crosswind takeoff?
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Displace the cyclic into the wind, heading is maintained with pedals, After
approximately 50 ft of altitude gained-the helicopter is turned into the
wind to maintain groundtrack(This is called Crabbing)
What is transverse flow effect?
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Basically, when in forward flight, the air passing over the rear portion of the
disk has a greater downwash angle than the air passing through the forward
portion. This creates more lift on the forward portion of the disk than the
rear portion of the disk. The result is a tendency for the helicopter to roll
slightly to the right as it accelerates through ETL
What is carburetor heat?
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Give this one a try later!
For every action there is an equal and opposite reaction
The air deflected down also produces and upward/lifting reaction.
What is the height/velocity diagram?
Give this one a try later!
A height/velocity (H/V) diagram, published by the manufacturer for each
model of helicopter, depicts the critical combinations of airspeed and
altitude should an engine failure occur.
,What is translating tendency?
Give this one a try later!
The tendency of the helicopter to drift in the direction of tail rotor thrust (to
the right).
While cruising, it is less significant because airflow is more horizontal
What is coning?
Give this one a try later!
An upward sweep of rotor blades as a result of lift and centrifugal force.
What performance characteristics will be adversely affected when an aircraft has
been overloaded?
Give this one a try later!
Longer takeoff run, both the rate and angle of climb will be reduced, the
service ceiling will be lowered, the cruising speed will be reduced, the
cruising range will be shortened, maneuverability will be decreased, a
longer running landing will be required because the landing speed will be
higher, excessive loads will be imposed on the structure- especially the
landing gear
What is the center of pressure?
, Give this one a try later!
the imaginary point on the chord line where the resultants of all
aerodynamic forces are considered to be concentrated.
This is why the helicopter flaps, feathers, leads, and lags
What are some considerations for a crosswind takeoff?
Give this one a try later!
Displace the cyclic into the wind, heading is maintained with pedals, After
approximately 50 ft of altitude gained-the helicopter is turned into the
wind to maintain groundtrack(This is called Crabbing)
What is transverse flow effect?
Give this one a try later!
Basically, when in forward flight, the air passing over the rear portion of the
disk has a greater downwash angle than the air passing through the forward
portion. This creates more lift on the forward portion of the disk than the
rear portion of the disk. The result is a tendency for the helicopter to roll
slightly to the right as it accelerates through ETL
What is carburetor heat?
Give this one a try later!
