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R44 Raven II  
Initial Operational Capability (IOC):
Total Production: 3,000
Unitary Cost: USD$375,000
Also Known As: R44 Clipper I, R44 Clipper II and R44 Raven I
Origin: United States of America
Corporations: Robinson Helicopter
Parent System: R44
Initial Operational Capability (IOC):
Total Production: 3,000
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Description: The Robinson R44 Raven is a light, four-seat, single-engine helicopter suitable for law enforcement and news coverage with optional fixed or pop-out floats for on water take-off and landing. The R44 helicopter standard equipment includes precision-engineered RPM governor, a durable rotor brake, an auxiliary fuel system for added versatility and longer range, a powerful heater/defogger, and hydraulic power controls that completely eliminate stick shake and control forces for a smooth, relaxing ride.

The R44 Raven I and R44 Raven II are powered by a single Lycoming O-540 or IO-540 piston engine respectively driving a two-bladed main rotor. The Raven I/Raven II equipped with floats are called Clipper I/Clipper II respectively. The fixed floats R44 helicopters have a cruise speed reduced by 10 knots due to the floats' additional drag. Overall, Raven II carries more payload, flies at higher altitudes and faster speeds than Raven I.

The R44 helicopter family has an affordable price tag of approx. $375,000 (as of 2007) and low operating costs. So far Robinson Helicopter has produced more than 3,000 R44s for customers worldwide.

R44 Raven II Specifications

Crew: 1
Main Rotor Blades: 2
Passengers: 3
Fuel Consumption: 12 gal/hr
Height: 129 inch (3.28 meter)
Length: 459 inch (11.7 meter)
Main Rotor Diameter: 396 inch (10.1 meter)
Width: 86 inch (2.18 meter)
Ceiling: 14,000 foot (4,267 meter)
Hovering Ceiling: 8,950 foot (2,728 meter)
Max Range: 400 mile (348 nautical mile)
Max Power at TakeOff: 225 hp (168 kW)
Climb Rate: 1,000 fpm (5.10 mps)
Cruise Speed: 135 mph (217 kph)
Top Speed at High Altitude: 1 mph (0.87 KTAS)
Time Between Overhaul: 2,200 hour
Empty Weight: 1,506 pound (683 kilogram)
Fuel Load: 184 pound (83 kilogram)
Max Takeoff Weight: 2,500 pound (1.13 ton)
Payload: 810 pound (367 kilogram)
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

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