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Robinson R44 Raven I > Section 1 - General > Flashcards

Section 1 - General Flashcards

1
Q

Main Rotor - Articulation

A

Free to teeter and cone, rigid inplane

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2
Q

Main Rotor - Diameter

A

33 ft

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3
Q

Main Rotor - Tip Speed at 102% RPM

A

705 feet per second

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4
Q

Number of Blades

A

Two

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5
Q

Main Rotor - Blade Chord

A

10.0 inches inboard,
10.6 inches outboard

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6
Q

Main Rotor - Blade Twist

A

-6 degrees

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7
Q

Tail Rotor - Articulation

A

Free to teeter, rigid inplane

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8
Q

Tail Rotor - # of Blades

A

Two

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9
Q

Tail Rotor - Diameter

A

58 inches

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10
Q

Tail Rotor - Blade Chord

A

5.1 inches (constant)

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11
Q

Tail Rotor - Blade Twist

A

Zero

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12
Q

Tail Rotor - Precone Angle

A

1 Degree

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13
Q

Tail Rotor - Tip Speed at 102% RPM

A

614 feet per second

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14
Q

Drive System - Engine to Upper Sheave

A

Four double Vee-belts with 0.778:1 speed reducing ratio

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15
Q

Drive System - Upper Sheave to Drive Line

A

Spray-type overrunning clutch

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16
Q

Drive System - Drive Line to Main Rotor

A

Spiral-bevel gears with 11:57 speed reducing ration

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17
Q

Drive System - Drive Line to Tail Rotor

A

Spiral-bevel gears with 31:27 speed increasing ratio

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18
Q

Powerplant - Model

A

Lycoming 0-540-F1B5

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19
Q

Powerplant - Type

A

Six cylinder, horizontally opposed, direct drive, air cooled, carbureted, normal aspirated

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20
Q

Powerplant - Displacement

A

541.6 cubic inches

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21
Q

Powerplant - Normal Rating

A

260 BHP @ 2800 RPM

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22
Q

Powerplant - Maximum continuous rating in R44

A

205 BHP at 2718 RPM (102% on tachometer)

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23
Q

Powerplant - 5 Minute take off rating in R44

A

225 BHP at 2718 RPM

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24
Q

Powerplant - Cooling System

A

Direct drive squirrel-cage blower

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25
Q

Performance Definitions - KIAS

A

Knots Indicated Airspeed is speed shown on the airspeed indicator

26
Q

Performance Definitions - KCAS

A

Knots Calibrated Airspeed is speed shown on the airspeed indicator corrected for instrument and postion error

27
Q

Performance Definitions - KTAS

A

Knots True Airspeed is airspeed relative to undisturbed air. It is KCAS corrected for pressure altitude and temperature

28
Q

Performance Definitions - VNE

A

Never-Exceed Airspeed

29
Q

Performance Definitions - Vy

A

Speed for best rate of climb

30
Q

Performance Definitions - Vh

A

Stabilized level-flight speed at maximum continous power

31
Q

Performance Definitions - MSL Altitude

A

Altitude above mean sea level, indicated by the altimeter )corrected for instrument error) when the barometric sub-scale is set to the atmospheric pressure existing at sea level

32
Q

Performance Definitions - Pressure Altitude

A

Altitude indicated by the altimeter (corrected for instrument error) when the barometric sub-scale is set to 29.92 inches of mercury (1013.2 mb)

33
Q

Performance Definitions - Density Altitude

A

Altitude in ISA conditions at which the air would have the same density (it is pressure altitude corrected for OAT)

34
Q

Performance Definitions - ISA

A

International Standard Atmosphere exists when pressure is 29.92 inches of mercury at sea level, temperature is 15 degrees C at sea level, and temperature decreases 1.98 degrees C per 1000 feet of altitude

35
Q

Performance Definitions - BHP

A

Brake Horsepower is actual power output of the engine

36
Q

Performance Definitions - MAP

A

Manifold Absolute Pressure is the absolute pressure in the engine intake manifold

37
Q

Performance Definitions - RPM

A

Revolutions Per Minute or speed of engine or rotor. (Shown by tachometer as percentage of 2665 engine RPM and 400 main rotor RPM)

38
Q

Performance Definitions - RPM

A

Revolutions Per Minute or speed of engine or rotor. (Shown by tachometer as percentage of 2665 engine RPM and 400 main rotor RPM)

39
Q

Performance Definitions - MCP

A

Maximum Continuous Power

40
Q

Performance Definitions - TOP

A

Takeoff Power (limited to 5 minutes in the R44)

41
Q

Performance Definitions - Critical Altitude

A

Altitude at which full throttle produces maximum allowable power (MCP or TOP).

42
Q

Performance Definitions - TOGW

A

Take off Gross Weight

43
Q

Performance Definitions - OAT

A

Outside Air Temperature

44
Q

Performance Definitions - CAT

A

Carburetor Air Temperature

45
Q

Performance Definitions - CHT

A

Cylinder Head Temperature

46
Q

Performance Definitions - GPH

A

Gallons Per Hour

47
Q

Performance Definitions - AGL

A

Above Ground Level

48
Q

Performance Definitions - IGE

A

In Ground Effect

49
Q

Performance Definitions - OGE

A

Out of Ground Effect

50
Q

Performance Definitions - ALT

A

Alternator

51
Q

Weight and Balance Definitions - Reference Datum

A

A vertical plane from which horizontal distances are measured for balance purposes. The Longitudinal reference datum is 100 inches forward of the main rotor shaft centerline for the R44.

52
Q

Weight and Balance Definitions - Station

A

Fore-and-aft location along the helicopter fuselage given in terms of distance in inches from the longitudinal reference datum.

53
Q

Weight and Balance Definitions - Arm

A

Horizontal distance from a reference datum to the center of gravity (CG) of an item.

54
Q

Weight and Balance Definitions - Moment

A

The weight of an item multiplied by its arm

55
Q

Weight and Balance Definitions - Center of Gravity (CG)

A

Location on the fuselage (usually expressed in inches from the reference datum) at which the helicopter would balance. CG is calculated by dividing the total helicopter moment by total helicopter weight.

56
Q

Weight and Balance Definitions - CG Limits

A

Extreme CG location within which the helicopter must be operated at a given weight

57
Q

Weight and Balance Definitions - Usable Fuel

A

Fuel available for flight planning

58
Q

Weight and Balance Definitions - Unusable Fuel

A

Fuel remaining in the tank that cannot reliably proceed uninterrupted fuel flow in the critical flight attitude.

59
Q

Weight and Balance Definitions - Standard Empty Weight

A

Weight of a standard helicopter including unusable fuel, full operating fluids, and full engine oil.

60
Q

Weight and Balance Definitions - Basic Empty Weight

A

Standard empty wight plus weight of installed optional equipment

61
Q

Weight and Balance Definitions - Payload

A

Weight of occupants, cargo, and baggage

62
Q

Weight and Balance Definitions - Useful Load

A

Difference between maximum gross weight and basic empty weight.

Robinson R44 Raven I (2 decks)

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