Updated: 16-Sep-2020
Leading is engineer Josef Hattinger.
“MTH, CB-22”
From Appendix 6: This brand has been defined presenting 1, 2 and 3 cylinder engines, such as the 421 single-cylinder, the 422 twin-cylinder and the 423 three-cylinder.
"The three mentioned engines"
-A new series of engines appear lately, the 721 and 722 models appear for now. The former is a single-cylinder and the latter a two-cylinder. With another type of gearbox and propeller extension.
“MTH 722”
From Appendix A3/6: It appears as built in Germany. Located some better photographs of the engine brand that appears blurry in the main text.
-Now here are the MTH 721C and MTH R422C models.
“MTH 721C”
“MTH R422C”
-The latter is a geared, liquid-cooled, 2-stroke twin-cylinder with double ignition. Principles that are used in the previous model.
-They build two other engines, the CB-12 and the CB-22.
-Both are two-cylinder, two-stroke engines with the same piston bore and stroke.
-They both are liquid cooled and have a mechanical gearbox giving 105 CV.
Engines of MTH
Model: 421
Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:
"MTH 421 engine"
Model: 422
Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:
"MTH 422 engine"
Model: 423
Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:
"MTH 423 engine"
Model: 721
Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:
"MTH 721C engine"
Model: 722
Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:
"MTH 722 engine"
Model: CB-12
Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:
Model: CB-22
Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:
"MTH, CB-22"