Design and development
The Hirth F-40 is a four-cylinder, two-stroke, 1,300 cc (79.3 cu in) displacement, liquid-cooled, gasoline engine design, with a helical gear mechanical gearbox reduction drive. It produces 120 hp (89 kW) at 4800 rpm.
- Type: Four cylinder, two stroke aircraft engine
- Bore: 76 mm (3.0 in)
- Stroke: 69 mm (2.7 in)
- Displacement: 1,300 cc (79.3 cu in)
- Dry weight: 69 kg (152.1 lb)
- Power output: 120 hp (89 kW)