| SBB Re 4/4I |
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Re 4/4I 10001 of the 1st series (SBB Historic, 2018). |
| Type and origin |
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| Builder | SLM, BBC, MFO, SAAS |
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| Build date | 1946–1948 (1st series)
1949–1951 (2nd Series) |
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| Total produced | 50 |
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| Specifications |
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Configuration:
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| • UIC | Bo’Bo’ |
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| Gauge | 1,435 mm |
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| Driver dia. | 1,040 mm |
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Length:
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| • Over beams | 14,700 mm (1st series)
14,900 mm (2nd Series) |
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| Width | 2,950 mm |
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| Height | 3,700 mm |
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| Service weight | 57 t
1st series originally 56 t |
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| Electric system/s | 15 kV, 16⅔ Hz |
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| Traction motors | 4 |
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| Performance figures |
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| Maximum speed | 125 km/h |
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Power output:
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| • 1 hour | 1,850 kW (2,480 PS) (1st series)
1,900 kW (2'520 PS) (2nd Series) |
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Tractive effort:
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| • Starting | 135 kN |
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|
| Career |
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| Numbers | 401–426 (original, 1st Series)
427–450 (original, 2nd Series)
10001–10026 (new, 1st series)
10027–10050 (new, 2nd Series) |
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| Retired | 1996–1998 |
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The Re 4/4I is a light electric express train locomotive of the Swiss Federal Railways (SBB for short) introduced 1946, which was built in two different series. These locomotives are the first bogie locomotives of the SBB. The SBB deliberately opted for a light fast train locomotive with only about 14 tons of axle load in order to be able to operate at even higher cornering speeds.
Their main remit was to run express trains on the east–west rail axis of Switzerland.
The locomotives originally designated as Re 4/4 were displaced in the 1960s by the RBe 4/4 engines with a high performance and a little later the much more powerful Re 4/4II in other services. Due to the Re 4/4II's introduction, the Re 4/4 was renamed to Re 4/4I.