Class 207M

SA101

SA102

Class 207M is a prototype series of Polish light Diesel Multiple Units (a.k.a. railcars). Only six were made in following configurations:

• two cars - a set of 207M power car and 207Mr trailer-control 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 the 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 railcars. However, due to politics-related economical problems Poland was facing in 1980s, it wasn't until 1990 that the first cars were produced.

The class 207M was developed in ZNTK Poznań by a team led by Polish renowned rail transport engineer Ryszard Suwalski. The concept 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 2001 a larger contingent of railcars/DMUs went into production and they were based on newer projects than 207M. The last class 207M unit was retired in 2017.

Technical data

	207M	207Mr	207Ma	207Mb	207Mra
PKP designation	SA101	SA121	SA102 (A)	SA102 (B)	SA111
year of production	1990–1992		1993–1996
motor type	Deutz BF6L513RC 200 kW	—	Deutz BF6L513RC 200 kW		—
axle configuration	1'A	1'1'	1'A		1'1'
maximum speed	90 km/h