Sift

Sliding friction; book across table

Fg= G*(m1*m2) / d(2)

Within a horizontal fluid, points of faster fluid speed will experience less pressure than slower speed

Weight, Lift, Thrust, Drag

Manufacturer's Empty Weight; No personnel, baggage, or fluids

MEW + crew, unusable fuel, equipment for flight; No baggage, passengers, usable fuel

All-up or Aircraft Gross weight; total weight at any time during a flight; decreases as fluids consumed during flight

Maximum Landing Weight; Less than AUW; Exceeding puts stress on landing gear and extends distance needed for land.

Max Zero Fuel Weight; permissible weight without usable fuel

Max Takeoff Weight; weight limit for takeoff; exceeding increases distance for takeoff, stress on structure

Max Ramp Weight; weight limit for ground taxi

Encompasses limits of speed, altitude, and angle of attack required by AC for stable flight; Incorrect combination could result in stall

Angle between chord of airfoil section and direction of airflow

Wing

Delfection of air as it passes over end of wing / blade

Control roll

Located from midpt to tip of wing's trailing edge, control roll

Located from fuselage to midpt of wing's trailing edge, control roll

Extended to reduce airspeed by creating drag

Caused by parasite on structure, skin friction, etc

Rough spot on the skin of AC

Produced by shape of AC, smaller AC reduces drag

'Top' air meets 'bottom' air, creates vprtex at tail of wing; automatically increases with AOA, airspeed, and lift

Fore to Aft, rotation along axis is called roll, controlled by ailerons

Across wings; rotation on axis called Pitch, angle of ascent or descent

Top to bottom; rotation on axis called Yaw, controlled by rudder

Desired position of AC (in trim)

Calibrated for 29.92" Hg; recalibrated after takeoff to destination airfield

AC performs better in cold temp because of higher air density; if too cold, wings must be de-iced before takeoff

Extends veritcally from main rotor transmission to Main Rotor Hub; provides rotational drive for MRH

Holds all components of main rotor head; blade grips, rotor blades, pitch horn, stabilizer bar, teeter hinge

Connect rotor blades to rotor system; allows blades to feather

Changing blades angle of attack relative to rotational plane

Gives lift to rotary craft

Aka Yoke; perpendicular to main rotor blades; connects to blade grips and stabilizer bar; recieves input from pitch links; causes feathering from pilot input

Aka flybar; maintain constant plane of rotation for blades; connected to swashplate;

Help dampen over-control from pilot & help AC in extreme wind

Aka trunnion; connects mast to main rotor hub; allows rotor hub & blades to flap up or down depending on input

Non rotating (inner) & outer components; moves up and down and tilts horo; causes directional control of AC;

Connects mast to outer swashplate, causing it to rotate

Aka push-pull tubes; connect to outer swashplate and stabilizer bar; translate pilot input to blade pitch

Supports tail rotor or directional fins

No tail rotor; Ducted fan used instead

Removable pieces of ACs outer skin

Landing gear for rotary wing AC

Faster air above blades, slower air below blades, creates lift

Tendency to drift laterally because of tail rotor thrust;

Counteracts blade-opposite rotation of aircraft; causes translational tendency

Force on rotating rotor felt 90 degrees later in plane of rotation