R66 POH DESCRIPTIVE DATA

MR Articulation

Free to teeter and cone, rigid in plane

MR Number of Blades

2

MR Diameter

33 feet

MR Blade Chord

11.5 inches inboard, 12.2 inches outboard

MR Blade Twist

-4 degrees

MR Tip Speed at 100% RPM

705 feet per second

TR Articulation

Free to teeter, rigid in plane

TR Number of Blades

2

TR Diameter

60 inches

TR Blade Chord

5.5 inches (constant)

TR Blade Twist

0

TR Precone Angle

1 Degree

TR Tip Speed at 100% RPM

635 feer per second

Engine to Drive Line

Sprag type overrunning clutch, spiral-bevel gears with 13:37 speed reducing ratio

Drive Line to Main Rotor

Spiral-bevel gears with 11:57 speed reducing ratio

Drive Line to Tail Rotor

Spiral-bevel gears with 31:27 speed increasing ratio

Powerplant Model

Rolls-Royce 250-C300/A 1 commercial designation RR300

Powerplant Type

Free-turbine turboshaft

Powerplant Manufacturer's rating

300 shp

R66 5 minute takeoff rating

270 SHP

R66 continuous rating

224 SHP

Fuel Total Capacity

74.6 US gallons (282 liters)

Fuel Usable Capacity

73.6 US gallons (279 liters)

Maximum Gross Weight

2700 lb (1225 kg)

Minimum gross weight

1400 lb (635 kg)