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41 Cards in this Set
- Front
- Back
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Skid to skid Width
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76 in
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Fuselage width
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44 in
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Rotor Radius
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151 in
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Fuselage height
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69 in
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Tail Rotor Diameter
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42 in
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Skid to Tail length
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259 in
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Overall length
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345 in
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Overall height
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107 in
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Main Rotor diameter
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25 feet 2 inches
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Main Rotor Blade Chord
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7.2 inches (CONSTANT)
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Main Rotor Blade Twist
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-8 degrees
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TR Diameter
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3 feet, 6 inches
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TR Blade Chord
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4 inches (CONSTANT)
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TR Blade Twist
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0 degrees
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Drive Line to Main Rotor Ratio
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Spiral-bevel gears with 11:47 speed reducing ratio
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Drive Line to Tail Rotor Ratio
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Spiral-bevel gears with 3:2 speed increasing ratio
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Powerplant Type:
- - - - - |
Four cylinder, horizontally opposed, direct drive air cooled, carbureted, normally aspirated
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Powerplant Description
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Lycoming O-360-J2A
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Normal rating (R22 Beta II)
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145 BHP (derated) @ 2700 RPM
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Max. Continuous rating in R22:
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124 BHP at 2652 RPM
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5 min takeoff rating for Beta and Beta II only
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131 BHP at 2652 RPM
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Cooling system:
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Direct Drive Squirrel Cage Blower
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KCAS
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Calibrated A/S = speed shown on the airspeed indicator corrected for instrument and position error
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KTAS ("relative to undisturbed air")
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True Airspeed = KCAS corrected for pressure altitude and temperature
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Vy
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Speed for best rate of climb
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MAP ("Manifold Pressure")
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the absolute pressure, in inches of mercury, in the engine intake manifold
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Engine RPM on tach is % of...
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2550
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Main rotor RPM on tach is % of...
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510
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Critical Altitude
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Altitude at which full throttle produces maximum allowable power
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Reference Datum ("the vertical plane from which horizontal distances are measured for balance purposes")
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100 inches forward of the main rotor shaft centerline
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Station or Arm
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Fore-and-aft location along the helicopter fuselage usually given in terms of distance in inches from the reference datum
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Moment
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the weight of an item multiplied by its arm
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Center of Gravity
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Location along the fuselage (in inches from the reference datum) at which the helicopter would balance.
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CG = _____/______
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CG = total helicopter weight / total helicopter moment
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CG LImits
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Extreme CG locations within which the helicopter must be operated at a given weight
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Usable Fuel
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Fuel available for flight planning
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Unusable fuel
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Fuel remaining after a runout test has been completed in accordance with governmental regulations
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Stnd. Empty Weight
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Weight of a standard helicopter including unusable fuel, full operating fluids, and full oil
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Basic Empty Weight
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Stnd. Empty Weight plus weight of installed optional equipment
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Payload
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Weight of occupants, cargo and baggage
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Useful Load
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Difference between maximum takeoff weight and basic empty weight
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