The Lanz HM8 is a farm tractor produced by Lanz from 1923 to 1925 in Mannheim, Baden-Württemberg, Germany. It features a 3.8L single-cylinder liquid-cooled kerosene engine producing 8 hp. The tractor uses a unique 1-speed gear transmission where the engine directly drives the rear axle via a chain, and reverse is achieved by restarting the engine in the opposite rotation. It has two-wheel drive, manual steering, and an open operator station. The tractor weighs 2760 lbs (1251 kg).
Detailed specifications and technical data for Lanz HM8
Power
Engine power:8 hp (6.0 kW)
Engine
Type:Lanz 3.8L 1-cyl kerosene
Power:8 hp (6.0 kW)
Cooling:liquid-cooled
Cylinders:1-cylinder
Fuel type:kerosene
Rated RPM:500
Bore/Stroke:6.30x7.48 inches (160 x 190 mm)
Displacement:233.1 ci (3.8 L)
Dimensions
Weight:2760 lbs (1251 kg)
Mechanical
Drive:Two-wheel drive
Steering:Manual steering
Operator station:Open operator station
Production
Built in:Mannheim, Baden-Württemberg, Germany
Manufacturer:Lanz
Years produced:1923 - 1925
Transmission
Type:gear
Gears:1 forward and reverse
Notes:The Lanz HM8 did not have transmission in the typical sense. A drive chain from the engine directly powered the rear axle. To move the tractor in reverse the engine would be re-started in the opposite rotation direction.