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The R44 Raven 1


The R44 is a single-engined helicopter with a semi-rigid two-bladed main rotor, a two-bladed tail rotor and a skid landing gear. It has an enclosed cabin with two rows of side-by-side seating for a pilot and three passengers. Tail rotor direction of rotation on the R44 is reversed compared to the R22 for improved yaw control authority. On the R44 the advancing blade is on the bottom.

Designed during the 1980s by Frank Robinson and his staff of engineers, the R44 first flew on 31 March 1990. The R44 Astro was awarded an FAA Type Certificate in December 1992, with the first deliveries taking place in January 1993. In January 2000, Robinson introduced the Raven with hydraulically assisted controls and adjustable pedals. In July 2002, Robinson introduced the Raven II featuring a more powerful, fuel-injected engine and wider blades, allowing a higher gross weight and improved altitude performance.

Robinson produced 186 R44s in 2014.

Robinson R44 Raven 1

SPECIFICATIONS OF THE RAVEN I


  • Engine Lycoming O-540, six cylinder, carbureted Lycoming O-540, six cylinder, carbureted
  • Horsepower Derated to 225 for takeoff and 205 continuous Derated to 225 for takeoff and 205 continuous
  • Maximum Gross Weight 2400 lb (1089 kg) 2400 lb (1089 kg)
  • Approximate Empty Weight(incl. oil & standard avionics) 1450 lb (658 kg) 1500 lb (680 kg)
  • Standard Fuel (29.5 gal) 177 lb (80 kg) 177 lb (80 kg)
  • Auxiliary Fuel (17.0 gal) 102 lb (46 kg) 102 lb (46 kg)
  • Pilot, Passengers, and Baggage (with standard fuel) 773 lb (351 kg) 723 lb (328 kg)
  • Cruise Speed at Maximum Gross Weight up to 108 kts (200 km/h) up to 101 kts (187 km/h)
  • Maximum Range (no reserve) approx 300 nm (550 km) approx 300 nm (550 km))
  • Hover Ceiling IGE 6400 ft @ 2400 lb 6400 ft @ 2400 lb
  • Hover Ceiling OGE 4000 ft @ 2300 lb 4000 ft @ 2300 lb
  • Rate of Climb over 1000 fpm over 1000 fpm
  • Maximum Operating Altitude 14,000 ft 14,000 ft
  • Electrical System 28 volt and 14 volt