PKP class SA101
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Class 207M is a prototype series of Polish Diesel Multiple Units. Only six were made in following configurations:
- two cars - a set of 207M power car and 207Mr trailer car (PKP designation SA101+SA121)
- three cars - a set of: 207Ma power car, 207Mra trailer car, 207Mb power car (PKP designation SA102+SA111+SA102)
History
By the end of 1970s, steam traction in Poland was mostly retired. Non-electrified lines became operated with diesel locomotives. For short distance passenger traffic (mainly suburban trains) PKP was seeking a more economical solution than a heavy diesel locomotive pulling few cars. The obvious solution was the use of railbuses, which means a low-weight motorcars. However, due to politics-related economical problems Poland was facing in 1980s, it wasn't until the year 1990 that the first cars were produced. Few projects from 1980s were shut down in early stages and it was the class 207M that went into production in the year 1990.
The concept of the class 207M prospected trains from one up to four cars in consist. Only 2- and 3-car versions were made, three of each. Again, due to economical difficulties class 207M never went into serious production. After the year 2001 a larger contingent of railbuses went into production and they were based on newer projects than 207M.