Agusta GA.70

GA.70
Type 4-cylinder, air-cooled, horizontally opposed engine
National origin Italy
Manufacturer Agusta
First run 1955
Unit cost $1010 for the GA.70/O, $1340 for the GA.70/V in 1958 [1]

The Agusta GA.70 was a 4-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 158 hp. It was produced in the 1950s and 1960s.[2]

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[3]

General characteristics

  • Type: 4-cylinder air-cooled horizontally opposed aircraft piston engine, (G.A.70/V - vertically mounted helicopter engine)
  • Bore: 92 mm (3.62 in)
  • Stroke: 86.5 mm (3.41 in)
  • Displacement: 2.300 l (140.35 cu in)
  • Length: 760 mm (29.92 in), (G.A.70/V - 470 mm (18.50 in))
  • Width: 750 mm (29.53 in), (G.A.70/V - 540 mm (21.26 in))
  • Height: 450 mm (17.72 in), (G.A.70/V - 470 mm (18.50 in))
  • Dry weight: 80 kg (176 lb) dry
  • Designer: M. Ginnini

Components

  • Valvetrain: pushrod operated overhead valve, 2x inlet + 2x exhaust 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: 53.69 kW (72 hp) at 3,100rpm, (G.A.70/V - 61.15 kW (82 hp) at 3,300rpm)
  • Specific power: 23.352 kW/l (0.513 hp/cuin), (G.A.70/V - 26.6 kW/l (0.584 hp/cuin))
  • Power-to-weight ratio: 0.671 kW/kg (0.408 hp/lb), (G.A.70/V - 0.765 kW/kg (0.465 hp/lb))

Notes

  1. ↑ "none". Sport Aviation. July 1958.
  2. ↑ "none". Flight. July 1957.
  3. ↑ Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.

References

  • Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.
  • Erickson, Jack. Horizontally-Opposed Piston Aero Engines
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