Bell 407

Bell407 – a multi-purpose light helicopter, designed by the American company Bell Helicopter Textron. The Bell 206 L4 Long Ranger helicopter was used as a basic sample.

The prototype made its first flight on April 21, 1994. The first take-off of the pre-production helicopter took place on June 29, 1995 (CGFOS). The helicopter in 1996 was certified by TCCA and FAA. The first helicopters were ordered by Petroleum Helicopters. More than 300 helicopters were built before 1999. On June 15, 2010, the jubilee thousandth helicopter was sold.

The Bell 407 is equipped with a four-blade main rotor designed for the OH58D (Model406). The hub and blades without an assigned resource are made of composite material and provide better comfort and other flight characteristics in comparison with previous models. In the design of the rotor pylon, vibration dampers are used, similar tools are introduced into the skid gear circuit to eliminate resonance near the ground. Compared to the Bell 206, the 407th fuselage is 18 centimeters wider, which increases the volume of the cockpit. The glazing area is 35 percent larger. The helicopter has a Rolls Royce / Allison 250 C47 turboshaft engine: take-off power of 813hp (606 kW.), The largest continuous power of 700l.s. (522 kW.).

The engine is equipped with an electronic single-channel control system of the FADEC type. The usual fuel supply of 477l; in the rear luggage compartment, at the request of the customer, an additional tank with a capacity of 75 liters can be located. The engine provides the highest take-off weight and improved properties at high altitudes and high temperatures. The Glider 407 is generally similar in appearance to the LongRanger but differs from it by the tail boom, which is made of carbon fiber. In a typical helicopter configuration, seats are for five passengers and two crew members.

Bell in 1995 tested the tail rotor, which is enclosed in a ring, but this idea was subsequently abandoned. Bell engineers also investigated the possibility of mounting two engines on the Bell 407 but instead decided to design a completely new twin-engine helicopter, called Bell 27. He received two Pratt & Whitney Canada engines PW206D as a power plant.

The Bell 407 helicopter brought great fame around the world around the record flight, its route passed through the North and South poles of the Earth. A car with two crew members onboard took off from the airport of Fort Worth (Texas) on December 5, 2006, and returned on March 23, 2007. Over 579,000 km were covered within 189 days, a couple of dozen landings were made, even at the North and South poles. The net flight time was 300 hours.

Modifications

  • Bell 407 – Basic Model
  • ARH70 – the military version of Bell407, attack reconnaissance helicopter. 4 prototypes released.
  • Bell417 – A larger version of Bell407, the civil version of ARH70.
  • Bell407 – Light Observation Helicopter. Reconnaissance Military Helicopter.
  • Eagle407HP – Option with a more powerful engine 1033l.s. (760kW.).
  • Bell407AH – Civilian version, adapted for mounting weapons, infrared camera systems, and night vision.
  • Bell407GX – Variant with a synthetic vision system and GarminG1000H instrument panel.

Specifications

  • Crew: 1-2 pilots.
  • Passenger capacity: up to 6 passengers.
  • Payload: 1178 kg.
  • Length: 12.74m.
  • Fuselage length: 10.58m.
  • The diameter of the rotor: 10.67m.
  • Tail rotor diameter: 1.65m.
  • Fuselage width: 2.29m. (on runners).
  • Height: 3.32m.
  • The area which is swept by the rotor: 89.38 sq.m.
  • Empty weight: 1203kg.
  • Normal take-off weight: 2268kg.
  • The highest take-off weight: 2381kg.
  • with suspension: 2 721 kg.
  • The volume of fuel tanks: 484l (+ 72l in the luggage compartment).
  • Engines: 1 × Turboshaft RollsRoyce250C47B.
  • Thrust: 1 × 760hp (1 × 606 kW. (Take-off)).
  • Maximum permissible speed: 259km / h.
  • Practical range: 611km.
  • Flight duration: 3 hours42min.
  • Practical ceiling: 6100m.
  • Rate of climb: 6.8m./s.
  • Disk load: 27.9 kg./sq.m.
  • Thrust-to-weight ratio: 221W / kg. (for transmission with normal takeoff weight).
  • The width of the cargo compartment: 1.37m.
  • The height of the cargo compartment: 1.0m.
  • The highest speed:
    • by the ground: 246km / h.
    • at an altitude of 1220m .: 250km / h.
  • Cruising speed:
    • at the ground: 207km / h.
    • at an altitude of 1220 m.: 213km / h.
  • Static ceiling:
    • without applying the effect of the earth: 3170m.
    • using the effect of the earth: 3720m.
Graduated from Embry-Riddle Aviation University with a master's degree in aviation science. He began his career as an aviation researcher in local periodicals. Has a pilot license. Now are the author and developer of the Plane Worlds.