Dimensions Flashcards

1
Q

Overall Length

A

459 in (38’ 3”)

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2
Q

Overall Height

A

137 in (~11’ 4”)

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3
Q

Main Rotor Description

A

Free to teeter and cone, rigid in plane, underslung

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4
Q

Main Rotor (Diameter)

A

33 ft

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5
Q

Main Rotor (Blade Chord)

A

11.5 in inboard
12.2 in outboard

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6
Q

Main Rotor (Radius)

A

198 in (16’ 6”)

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7
Q

Main Rotor (Blade Twist)

A

-4 degrees

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8
Q

Main Rotor
(Tip Speed at 100% RPM)

A

705 ft/sec

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9
Q

Tail Rotor Description

A

Free to teeter, rigid in plane

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10
Q

Tail Rotor (Diameter)

A

60 in

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11
Q

Tail Rotor (Blade Chord)

A

5.5 in constant

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12
Q

Tail Rotor (Blade Twist)

A

0 degrees

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13
Q

Tail Rotor (Precone Angle)

A

1 degree

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14
Q

Tail Rotor
(Tip Speed at 100% RPM)

A

635 ft/sec

2,425 RPM

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15
Q

Drive System
(Engine to Drive Line)

A

Sprag type overrunning clutch, spiral-bevel gears with 13:27 speed reducing ratio

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16
Q

Drive System
(Drive Line to Main Rotor)

A

Spiral-bevel gears with 11:57 speed reducing ratio

17
Q

Drive System
(Drive Line to Tail Rotor)

A

Spiral-bevel gears with 31:27 speed increasing ratio

18
Q

Powerplant Description

A

Rolls-Royce 250-300/A1
Free-turbine turboshaft
300 SHP - Manufacturers rating
270 SHP - 5 min takeoff rating
224 SHP - continuous rating