Sisu Nemo

Sisu Nemo is a hydraulic radial piston motor type developed and initially produced by Suomen Autoteollisuus (SAT).

The motor produces a high torque at low speed and it has been primarily used to power both civil and military lorry trailers.

The members were Louhio, Pentti Tarvainen, Antti Saarialho and Lasse Airola; in addition, dozens of people from different departments took part in the development work.

The first field test took place in autumn 1960, with a Fordson Major tractor pulling a hydraulically driven trailer.

[1] The motor contains five fixed radial hydraulic cylinders, whose pistons end in rollers that in turn press outward against a ring whose inner profile consists of eight cams.

[3] Despite its small size, the system can deliver 8,000–10,000 newton metres of torque, so a separate planetary gear set is generally not required.

[3] The system also contains a twin pump unit attached to the free end of the towing vehicle engine.

The number of suitable haulers was so small that in case of mobilisation, moving the cannons would have relied on civil lorries.

The hauler was a Sisu KB-45 off-road lorry with a hydraulic system mounted on the front end and the oil container installed between the cabin and platform.

Later the system was tested with a Sisu K-141 4×2 together with a field cannon 130 K 54 and Vanaja KK-69 ET 6×6 coupled with a three-axle carriage powered by a separate aggregate-run pump.

The test proved even these trucks, not designed for off-road use, could haul heavy cannons in rough terrain using the Nemo system.

SAT founded a separate company Nesco Oy jointly with Multilift (40%) and investment fund Sponsor (20%).