Data on design, manufacture and status

Design authority: Robinson Helicopter Company

Primary manufacturer: Robinson Helicopter Company

Parent type: Robinson R44

Aircraft status: Operational


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: 1

Crew seating: Side-by-side

Landing gear: Skids

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height: 3.28 m 10.8 ft
Overall Length: 11.66 m 38.3 ft
Overall Width: 10.06 m 33.0 ft
Airframe Dimensions
Airframe Length: 9.01 m 29.6 ft
Airframe Width: 2.29 m 7.5 ft
Airframe Height: 3.28 m 10.8 ft
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track: 2.18 m 7.2 ft
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width: 1.28 m 4.2 ft

Weights and Performance

Data on aircraft weight and flight characteristics

MTOW Cruise Speed: 202 kmh

Max Gross Weight (ground): 1,134 kg 2,500 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 1,134 kg 2,500 lb
Empty Weight: 683 kg 1,506 lb
Useful Load: 451 kg 994 lb
Empty Weight Fraction: 0.602
Climb Performance
Max Rate of Climb: 5 m/s 1,000 fpm
Hover Performance
Hover Ceiling IGE: 2,728 m 8,950 ft
Hover Ceiling OGE: 2,286 m 7,500 ft
Max Level Flight Speed:  
Never Exceed Speed: 222 km/h 120 kts
Service Ceiling: 4,267 m 14,000 ft
Range and Endurance
Max Range: 550 km 297 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

Provided powerplant data is for uninstalled, sea level, static operations.

Number of engines: 1
Designation: Lycoming IO-540 reciprocating
Manufacturer: Lycoming Engines
Normal Ratings
Max continuous: 153 kW 205 hp
Take-off / rated: 183 kW 245 hp
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

RPM calculated from 705 FPS.

Main Rotor Characteristics
Diameter: 10.06 m 33.00 ft
RPM: 408.0 rpm 408.0 rpm
Direction of Rotation: Counterclockwise
Hub Type: Teetering hinge with blade coning hinges, rigid in plane
Main Rotor Blade Characteristics
Blade Construction: All-metal, Honeycomb structure
Blade Chord:  
Blade Tip Geometry: Conventional
Blade Twist: -0.070 rad -4.000 deg
Number of Blades: 2
Main Rotor Derived Characteristics
Disc Area: 79.46 m² 855.3 ft²
Disc Loading: 14.27 kg/m² 2.923 lb/ft²
Main Rotor Blade Derived Characteristics
Blade area per blade:  
Tip Speed: 214.88 m/s 705.0 fps

Primary Control Device

Data on primary control devices such as tail rotors

RPM calculated from 614 FPS.

Tail Rotor Characteristics
Diameter: 1.47 m 4.83 ft
Configuration: Pusher
Direction of Rotation: Top blade aft
RPM: 2426 rpm 2426 rpm
Tail Rotor Blade Characteristics
Number of Blades: 2
Blade Construction: All-metal
Blade Chord: 0.130 m 0.43 ft
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area: 1.70 m² 18.3 ft²
Solidity: 0.1120
Tail Rotor Blade Derived Characteristics
Tip Speed: 187.13 m/s 614.0 fps
Blade Area (per blade): 0.095 m² 1.03 ft²

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