Neha Patil (Editor)

Omega BS 12

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Top speed
  
138 km/h

First flight
  
October 29, 1956

Length
  
11 m

Manufacturers
  
Allied Aero Industries, Omega Aircraft Corp

The Omega BS-12 was a utility helicopter with high ground clearance designed to carry loads behind the cabin at, or near, the center of gravity.

Contents

Design & development

After qualified success with his Sznycer SG-VI-D and SG-VI-E single-engined helicopters, Bernard Sznycer expanded his concepts to produce a flying crane / utility helicopter, intended to be inexpensive to produce and relatively cheap to operate. Sznycer designed the BS-12 as a cargo or flying crane helicopter with optional passenger accommodation and licensed development and production to the Omega Aircraft Corp. Powered by twin piston engines mounted horizontally on either side of the main gearbox the BS-12 was designed to be safe in an emergency for single-engined flight even at high gross weights. Accommodation in the flying crane version was for four, (later 5 in the BS-12D), including flight crew, which could be augmented by an underslung passenger cabin.

Operational history

The first example was tested in 1956. By 1960 the program was canceled.

Variants

BS-12
Initial prototype powered by 2x 210 hp (156.60 kW) Franklin 6AS-335 engines, one built (c/n 156).
BS-12B
Revised BS-12, one built (c/n 1001).
BS-12D-1
Five-seat passenger cabin, powered by 2x 260 hp (193.88 kW) Lycoming O-540-FlB5 engines, two built (c/n 1002 & 1003).
BS-12D-3
The second BS-12D-1 powered by 2x supercharged Franklin 6AS-335 engines.
BS-12F
Projected turboshaft powered version, 2x Allison T63 or Boeing 502-W turbines.
BS-12J
Projected improved hot-high and single-engined performance, powered by 2x 290 hp (216.25 kW) Lycoming IO-540 engines.
BS-14 Falcon
Projected emergency services version, with longer cabin, powered by 2x 260 hp (193.88 kW) Lycoming O-540 or 290 hp (216.25 kW) Lycoming IO-540 engines.
BS-17A Airliner
Projected enlarged passenger cabin version to have been powered by 3x Allison or Boeing turboshaft engines driving a 5-bladed main rotor

Specifications (BS-12)

Data from Popular Science

General characteristics

  • Capacity: four
  • Length: 11.2 m (36 ft 9 in)
  • Height: 3.96 m (13 ft 0 in)
  • Empty weight: 1,417 kg (3,125 lb)
  • Gross weight: 1,905 kg (4,200 lb)
  • Powerplant: 2 × Franklin 6AS-335 Piston, 160 kW (210 hp) each
  • Main rotor diameter: 11.89 m (39 ft 0 in)
  • Performance

  • Maximum speed: 138 km/h (86 mph; 75 kn)
  • Cruise speed: 137 km/h; 74 kn (85 mph)
  • Range: 250 km (155 mi; 135 nmi)
  • Service ceiling: 3,450 m (11,319 ft)
  • Rate of climb: 6.1 m/s (1,200 ft/min)
  • References

    Omega BS-12 Wikipedia