Dimensions

Question 1

Overall Length

Answer 1

459 in (38’ 3”)

Question 2

Overall Height

Answer 2

137 in (~11’ 4”)

Question 3

Main Rotor Description

Answer 3

Free to teeter and cone, rigid in plane, underslung

Question 4

Main Rotor (Diameter)

Answer 4

33 ft

Question 5

Main Rotor (Blade Chord)

Answer 5

11.5 in inboard
12.2 in outboard

Question 6

Main Rotor (Radius)

Answer 6

198 in (16’ 6”)

Question 7

Main Rotor (Blade Twist)

Answer 7

-4 degrees

Question 8

Main Rotor
(Tip Speed at 100% RPM)

Answer 8

705 ft/sec

Question 9

Tail Rotor Description

Answer 9

Free to teeter, rigid in plane

Question 10

Tail Rotor (Diameter)

Answer 10

60 in

Question 11

Tail Rotor (Blade Chord)

Answer 11

5.5 in constant

Question 12

Tail Rotor (Blade Twist)

Answer 12

0 degrees

Question 13

Tail Rotor (Precone Angle)

Answer 13

1 degree

Question 14

Tail Rotor
(Tip Speed at 100% RPM)

Answer 14

635 ft/sec

2,425 RPM

Question 15

Drive System
(Engine to Drive Line)

Answer 15

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

Question 16

Drive System
(Drive Line to Main Rotor)

Answer 16

Spiral-bevel gears with 11:57 speed reducing ratio

Question 17

Drive System
(Drive Line to Tail Rotor)

Answer 17

Spiral-bevel gears with 31:27 speed increasing ratio

Question 18

Powerplant Description

Answer 18

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