Posted by fdt860 on October 05, 2023 at 14:21:51 from (109.222.132.216):
In Reply to: Opposed-Piston Engines posted by Geo-TH,In on October 05, 2023 at 02:28:00:
The french company MAP (aris weapons manufacturer) built a tractor and engine right after the war that was a two strokes, with opposed pistons, 2 big rockers, and one crank. The map tractor had only two cylinders (4 pistons), but a 4 cylinders was made for a car that did speed records.
Map engines had a problem with the rocker shafts turning in the bore and preventing lubrication.
The design and factory was sold to simca, but only the tractor tranny was kept, and became the Someca DA50, a very strong workhorse, with a muchmore reliable Fiat engine. A DA50 or someca som 40 is not afraid of any john deere or ih of the same period,as far as reliability is concerned.
There are pictures and a movie of a cutaway engine.
Second famous one is the french made CLM engine,probably with a junkers license. This economical diesel engine was offered as a repower for the ferguson te20 in the single cylinder version, and some tractors like Labourier offered a 2 cylinders version from the factory.
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