- Aircraft History, Specification and Information -
Brantly B-2
Brantly B-2 Helicopter - N2115U
1962 Brantly B-2 Helicopter N2115U (sn 163)
Photo taken July 07, 2006
Oroville, WA - USA (K0S7)
Photo © Marcel Siegenthaler

The Brantly B-2 is an American two-seat light helicopter produced by the Brantly Helicopter Corporation.

Design and development

After the failure of his first design, the Brantly B-1, Newby O. Brantly decided to design a simpler and less complicated helicopter for the private buyer. The B-2 had a single main rotor and an anti-torque tail rotor and first flew on 21 February 1953. This was followed by an improved second prototype that first flew on 14 August 1956.

The B-2A was introduced with a modified cabin, and the B-2B had a larger 180hp fuel-injected engine. The B-2B has a three-blade main rotor and an all-metal fuselage, it can be operated with skid, wheel or float landing gear. Unusually, to save room, the engine is fitted vertically in the fuselage behind the cabin.

Operational history

The basic design remained in production for over 30 years. The United States Army evaluated the B-2 (designated the YHO-3) in 1958, although it was not ordered. An improved larger version with five seats was designated the Brantly 305.

Variants

  • Brantly B-2 - Two-seat single-engined light utility helicopter.
  • Brantly YHO-3 - United States military designation for the B2.
  • Brantly B-2A - Initial production version.
  • Brantly B-2B - Improved version, fitted with new metal rotor blades, and an uprated fuel-injected 180hp Lycoming piston engine.
  • Brantly 305 - Larger five-seat version.
  • H-2 - Designation of the B-2B built by Brantly-Hynes between 1976 and 1979.
  • Brantly B-2J10 - Projected tandem-rotor version with longer and wider fuselage for carrying passengers and/or cargo. Unbuilt.

Operators

Civil Operators

  • United States
    Pacific Southwest Airlines

Military Operators

  • United States
    United States Army

Accidents and incidents

The B-2 has had 21 fatal accidents between February 1964 and August 2009.

Survivors

B-2 N2143U was purchased in 1962 and flown by Dean Svec for all of its total of 2,108 hrs. It was retired in 2006 and is now on permanent public display at the Crawford Auto-Aviation Museum - Western Reserve Historical Society in Cleveland, Ohio.

A B2B belonging of the Flying Gyrocopter and Old Aircraft museum at Midden-Zeeland, Netherlands was reportedly about to fly again November 2009.

Specifications (B-2B with skid landing gear)

General characteristics
Length: 21 ft 9 in (6.63 m)
Rotor diameter: 23 ft 9 in (7.24 m)
Height: 6 ft 9 in (2.06 m)
Disc area: 442 ft² (41.06 m²)
Empty weight: 1,020 lb (463 kg)
Max takeoff weight: 1,670 lb (757 kg)
Powerplant: 1× Avco Lycoming IVO-360-A1A air-cooled flat-four piston, 180 hp (134 kw)

Performance
Maximum speed: 100 mph (87 knots, 161 km/h) at sea level
Cruise speed: 90 mph (78 knots, 145 km/h) (75% power)
Range: 250 miles (217 km, 400 km)
Service ceiling: 10,800 ft (3290 m)
Rate of climb: 1,900 ft/min (9.7 m/s)

Last updated November 21, 2010
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Brantly B-2".
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