Although these engines are now getting old (and in some cases very old), Simplex can still provide service engineers as well as a wide range of parts for Nohab Polar engines, including models:
These parts are sourced from leading specialist component manufacturers all of which are based in Europe, and are covered by our 12 month guarantee for major items. This guarantee is supported by our £5 million product liability insurance. The parts which we can supply include:
The Nohab Polar F10-F30 is a series of engine models which was first manufactured in 1961. Production of the F20 commenced in 1972 and the F30 in 1984. The last F30 left the factory in the mid 1990s. All engines were single acting, four-stroke, trunk-type, compression ignition diesel engines. They were turbocharged and were manufactured primarily in Trollhättan, Sweden, although some engines were manufactured under licence in Glasgow. The bore size was 250 mm and the stroke 300 mm.
These engines were produced in different configurations both as in-line engines with three, four, five and six cylinders and in V form as eight, twelve and sixteen cylinders. Curiously we are unaware of any nine cylinder engines being constructed. The normal way of designating these engines was:
Initially the propulsion engines operated at 750 rpm but over the years as the new models were introduced this increased to 825 rpm and finally 900 rpm (1000 rpm for power generation using diesel rather than HFO). Engine revolutions and power output per cylinder varied according to the application (propulsion or power generation) and the set- up of the engine. As a guidance and using the propulsion figures with HFO the F10 produced 121 kW/cyl, the F20 kW/cyl and the F30 187.5 kW/cyl. The outputs for diesel fuel applications were higher reaching a maximum of 209 kW/cyl for power generation.
The engines were very robust and there are still quite a number of F10 engines still running even though they are all over forty years old. The engines were popular as propulsion units in the offshore industry, as well as in tugs, coastal vessels and other smaller craft and they were also used as power generating sets.