R44 Raven II

High Performance R44

Introducing the R44 Raven II, the latest derivative of the very successful and proven R44 helicopter line. The Raven II is equipped with a fuel-injected, angle-valve, tuned-induction, IO-540 Lycoming engine which produces substantially more power and gives the Raven II greater altitude performance, more payload, and increased speed. The Raven II configuration is also available as an IFR Trainer, Newscopter, Police Helicopter, and Clipper II.

The new fuel-injected engine provides higher power for better performance and eliminates the need for carburetor heat. The engine is derated to 245 HP for 5 minutes and 205 HP maximum continuous rating, to assure a longer life and lower cost of maintenance. Overall, the Raven II provides a favorable 100 lb increase in the R44ís gross weight and increased IGE and OGE hover ceilings, while eliminating the carburetor and carburetor icing problems.

Another major enhancement is the reduced noise level of the Raven II. The quieter helicopter features redesigned main and tail rotor blades. Both sets of rotors are fitted with noise attenuating blade tip caps that decrease flyover noise by 1dB. The main rotor blades also have more surface area for increased lifting capability at altitude.

Raven II Features:

High Reliability and Low Maintenance

Reliable Engine.

The Raven's dependable Lycoming O-540 engine (Raven I) and IO-540 engine (Raven II) are derated for long life and unmatched reliability.

Patented Rotor Design.

Robinson's patented tri-hinge rotor eliminates lag hinges, dampers, and hydraulic struts. Stainless steel main rotor blades resist corrosion and have thick leading edges to minimize erosion.


No scheduled maintenance, other than oil changes, required between 100-hour inspections.


Teflon-lined, elastomeric, and sealed bearings eliminate most lubrication requirements.


Maintenance-free flexible couplings are used in place of universal joints or gear couplings in the main and tail drive systems.


Primary controls are actuated by maintenance-free bellcranks and push-pull tubes, eliminating the need for control cables and pulleys.


2200 hours or twelve years approved time-between-overhaul period for the R44 engine and airframe. All life-limited components have approved service lives of at least 2200 hours.

Worldwide Service.

Factory-trained technicians at more than 280 service centers throughout the world use certified Robinson parts and tools to provide quality service for R44 helicopters.

Advanced Technology

Hydraulic Power Controls.

Completely eliminate cyclic stick shake and control forces in flight.

Balanced Pistol Grip Cyclic Controls.

Ergonomic grips incorporate two-position trigger switches for intercom and transmit. Grips also have buttons for convenient storing and switching of COMM frequencies.

RPM Governor.

No more throttle twisting; precision-engineered governor automatically controls engine RPM during all normal operations.

Rotor Brake.

Allows the pilot to stop the rotor quickly, greatly reducing shutdown time and the risk of injury to ground personnel.

Advanced Warning Devices.

The instrument panel includes low fuel warning light, main gearbox temperature and chip lights, tail gearbox chip light, low oil pressure light, engine fire light, low voltage alternator light, low RPM warning light and horn, plus rotor brake and starter engaged warning lights.

Automatic Clutch Engagement.

Simplifies start-up procedure and reduces the possibility of an overspeed.

Carburetor Heat Assist (Raven I Only).

Enhances safety and reduces pilot workload by automatically adding carb heat when the collective is lowered and reducing carb heat when the collective is raised.

Comfort and Convenience

Adjustable Pedals.

Right side pilot pedals allow two inches of fore and aft adjustment.


Comfortable "two plus two" seating provides front and rear passengers with wide, unobstructed views. No center bulkhead or post impedes visibility. Large windows in each door allow clear sideward vision from all seats.

Low Noise Level.

Heavy-duty muffler, low tail rotor tip speed, and a large, cambered fin to off-load the tail rotor make the R44 a "community friendly," quiet helicopter. Thick acoustical foam achieves surprisingly low cabin noise levels.

T-Bar Cyclic.

Robinson's patented cyclic design eliminates uncomfortable stick between knees and eases cabin entry and exit.

Ample Baggage Compartments.

All four seats hinge up for access to concealed storage areas for carry-on bags, briefcases, supplies, and other belongings. A custom Robinson travel bag is standard equipment on new R44s.

Heating and Ventilation.

An adjustable heater distributes heat to all four seats. Fresh air vents in the cabin nose and each door provide generous ventilation for all passengers.

Off Airport Landings.

High-mounted tail rotor and raised exhaust provide an added margin of safety at off-airport destinations.

Two-Bladed Main Rotor.

Requires less than one-third the hangar space of a multi-bladed rotor.

Voice-Activated Intercom Standard.

A high-quality voice-activated intercom eliminates the need to use intercom switches during doors-on flights. Floor and hand intercom switches are included for doors-off operations.

Specifications and Dimensions

Gross Weight 2,500 lb
Empty Weight Equipped (incl oil & avionics) 1,506 lb
Standard Fuel (30.6 gal) 184 lb
Auxiliary Fuel (18.3 gal) 110 lb
Passengers and Baggage w/standard fuel 810 lb
Passengers and Baggage w/auxiliary fuel 700 lb
Cruise Speed > 135 mph (117 kts)
Maximum Range (no reserve) > approx 400 miles (348 nm)
Hover Ceiling IGE @ 2500 lb > 8,950 feet
Hover Ceiling OGE @ 2300 lb > 7,500 feet
Hover Ceiling OGE @ 2500 lb > 4,500 feet
Rate-of-Climb @ 2500 lb & 6000 feet > over 1,000 fpm
Maximum Operating Altitude > 14,000 feet

Performance Graph