MTH R 422-CG
# MTH R 422-CG

The MTH R 422-CG is an Austrian aircraft engine, designed and produced by MTH Engines of Mattsee for use in ultralight aircraft.

## Design and development

The engine is a twin-cylinder two-stroke, in-line, 1,339 cc (81.7 cu in) displacement, liquid-cooled, gasoline engine design, with a toothed mechanical gearbox reduction drive with a reduction ratio of 3.0:1. It employs dual electronic ignition systems and produces 105 hp (78 kW) at 6500 rpm, with a compression ratio of 12:1.

## Specifications (R 422-CG)

Data from Tacke

### General characteristics

* Type: Twin cylinder, two stroke aircraft engine
* Bore: 99 mm (3.9 in)
* Stroke: 87 mm (3.4 in)
* Displacement: 1,339 cc (81.7 cu in)
* Dry weight: 42 kg (92.6 lb)

### Components

* Fuel type: gasoline
* Cooling system: liquid
* Reduction gear: toothed mechanical gearbox

### Performance

* Power output: 105 hp (78 kW)
