直升机信息_直升机_直升飞机_旋翼机_Helicopter

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cyclic pitch changes

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rotor disc attitude

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rotor thrust tilt

-yaw pedals
-fuselage torque
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tail rotor drift

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tail rotor roll

-fenestron tail
-tandem rotors
-co-axial rotors -notar
e) Rotor blade freedom of movement
-feathering
-the feathering hinge
-pitch angle
-flapping
-the flapping hinge
-alleviation of bending stresses
-flapping to equally
-dragging
-the drag hinge
-drag dampers
-leading/ lagging
-periodic drag changes
-blade c.g. (conservation of angular momentum)
-hookes joint effect
f) Phase lag and advance angle
-the control orbit
-pitch operating arm movement
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rate of pitch change

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rate of blade flapping

-resulting disc altitude
-phase lag definition
-advantage angle – definition
g) Vertical flight
-take-off
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vertical climb

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vertical descent

-hover outside ground effect
-ground effect
-factors affecting ground cushion
-dynamic roll-over avoidance of
h) Forces in balance
-at the hover
-in forward flight
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influence of cg

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influence of rotor shaft tilt

i) Translational lift
-effect of horizontal airflow on induced flow
-variation of total flow through the disc with forward flight
-the relationship between pitch angle and angle of attack j) Power Requirements
-rotor profile power
-power absorption – tail rotor and ancillary equipment
-rotor profile power variation with forward speed
-induced drag
-parasite drag
-total power required
-power available
k) Further aerodynamics of forward flight
　
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