Brantly B-2

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Brantly B-2
A brantly B2B in the Helicopter Museum, Weston-super-Mare
Type: Micro helicopter
Design country:

United StatesUnited States United States

Manufacturer:

Brantly Helicopter Corporation

First flight:

1953

Commissioning:

1959

Production time:

In series production since 1959

Number of pieces:

Over 400

The Brantly B-2 is a two-seat helicopter made by the US company Brantly Helicopter Corporation , which is powered by a piston engine.

history

The Brantly B-2 was designed as a two-seat multipurpose helicopter by Newby O. Brantly in the early 1950s . The first flight took place on February 21, 1953. This first prototype completed 130 hours of flight before the second prototype began test operations on August 14, 1956.

construction

The B-2 is built in a conventional tail rotor configuration . The three-blade all-metal main rotor is equipped with a compensation flap system, the profile of the main rotor blades corresponds to NACA 0012 . A four-cylinder boxer engine from the manufacturer Lycoming of the O-360 series serves as the drive . A gear reduction gear provides the power transmission to the main rotor; the two-blade tail rotor for torque compensation is driven by a shaft 1: 1 at the speed of the drive motor. The machine has an all-metal hull in a half-shell design that tapers towards the rear . The landing gear is equipped with four pneumatic- hydraulic shock absorbers ( Oleos ).

Versions

B-2
The first model was approved by the FAA on April 27, 1959.
YHO-3 BR
As part of the United States Army's Light Observation Helicopter (LOH) program in 1955, the B-2, known as the YHO-3 BR, was considered as a possible candidate. The US Army tested five copies, but the B-2 could not prevail against its competitors ( Sud-Ouest Djinn and Hughes 269 ) due to weaknesses in the design.
B-2A
Approved by the FAA on December 21, 1962.
Version B-2B in Cranfield , 1996
B-2B
As an improved version with new rotor blades made of metal and a Lycoming IVO-360-A1A with direct injection and increased power, the B-2B was approved by the FAA on July 1, 1963. This version is currently the only helicopter produced by the Brantly Helicopter Corporation .
V750
At the air show Airshow China 2010 in Zhuhai , the new owner of the company, which presented Qingdao Haili Helicopters Co. Ltd ., Which Brantly B-2B as unmanned aircraft . The Qingdao Haili Helicopter Manufacturing Co. Ltd. in cooperation with Weifang Tianxiang Aerospace Industry Co. Ltd. and the China National Aero-Technology Import and Export Corporation (CATIC) had its maiden flight in Weifang on May 7, 2011. The UAV is able to transport a payload of up to 80 kg. The manufacturer Weifang Freesky Aviation Industry Co., Ltd. was represented at the ILA 2014 and announced that it had already sold 18 V750s worldwide.

Technical specifications

(Manufacturer information for the B-2B)

Parameter Data (metric) at ISA
crew 2
Hull length 6.43 meters (21.1 feet)
Width over runners 2.08 meters (6 feet and 10 inches)
height 2.11 meters (6 feet and 11 inches)
Main rotor diameter 7.24 meters (23.9 feet)
Tail rotor diameter
Empty mass 481 kilograms (1070 pounds)
External payload
Takeoff mass 622 kilograms (1370 pounds )
drive 1 × Lycoming O-360
fuel 117 liters (31 gallons ) (92 to 100 octane )
Starting power 132 kW (180 hp) at 2900 min -1
Rate of climb 427 m / min (1400 ft / min)
HIGE 1074 meters (3525 feet )
HOGE
Service ceiling
Cruising speed 145 km / h (78 knots)
Top speed 161 km / h (87 knots )
Range 322 km (174 NM )

Comparable helicopter types

literature

  • Karlheinz Kens: types of aircraft. 4th edition, Carl Lange Verlag, Duisburg 1963.
  • William Green: The Observer's World Aircraft Directory. Frederich Warne & Co., 1961.

Web links

Commons : Brantly B-2  - Collection of pictures, videos and audio files

Individual evidence

  1. CONARC Summary of Major Events and Problems, FY 58, Vol. V, Mat Dev Sec Army Avn & Abn Div, Jan - Jun 58, p. 2.
  2. aviationweek.com: VTOL UAVs on the Rise In China , November 19, 2010
  3. Chinese Unmanned Helicopter on the CCTV website
  4. Chinese largest unmanned helicopter flight , May 9, 2011