Agusta GA.70

The Agusta GA.70 was a four-cylinder, air-cooled, horizontally opposed engine developed in Italy for light aircraft and helicopter use. The GA.70/V featured a bottom sump for vertical applications and was rated at 61 kW (82 hp). It was produced in the 1950s and 1960s.[1]

GA.70
GA.70 on display at the Hubschraubermuseum Bückeburg
Type 4-cylinder, air-cooled, horizontally opposed engine
National origin Italy
Manufacturer Agusta
First run 1955

Variants

GA.70/0
Horizontal mounting for light aircraft.
GA.70/V
Vertical mounting for helicopters.

Applications

Specifications (GA.70)

Data from Jane's All the World's Aircraft 1962-63.[2]

General characteristics

  • Type: 4-cylinder air-cooled horizontally opposed aircraft piston engine, (G.A.70/V - vertically mounted helicopter engine)
  • Bore: 92 mm (3.6 in)
  • Stroke: 86.5 mm (3.4 in)
  • Displacement: 2.3 L (140.4 cu in)
  • Length: 760 mm (29.9 in), (G.A.70/V - 470 mm (18.5 in))
  • Width: 750 mm (29.5 in), (G.A.70/V - 540 mm (21.3 in))
  • Height: 450 mm (17.7 in), (G.A.70/V - 470 mm (18.5 in))
  • Dry weight: 80 kg (176 lb) dry
  • Designer: M. Ginnini

Components

  • Valvetrain: pushrod operated overhead valve, 2 x inlet + 2 x exhaust valves per cylinder
  • Fuel system: Stromberg NAS 3 carburettor
  • Fuel type: 80/87 octane
  • Oil system: Pressure lubrication with a gear driven pump
  • Cooling system: Air-cooled

Performance

  • Power output: 54 kW (72 hp) at 3,100rpm, (G.A.70/V - 61 kW (82 hp) at 3,300rpm)
  • Specific power: 23.35 kW/L (0.51 hp/cu in), (G.A.70/V - 26.6 kW/L (0.58 hp/cu in))
  • Power-to-weight ratio: 0.67 kW/kg (0.41 hp/lb), (G.A.70/V - 0.765 kW/kg (0.465 hp/lb))

Notes

  1. "none". Flight. July 1957.
  2. Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.

References

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