| 词条 | ALCO DH643 | ||||||||
| 释义 |
|name = ALCO C-643DH |powertype = Diesel-hydraulic |image = Southern Pacific -9152.jpg |caption = Southern Pacific #9152, formerly #9020. |builder = American Locomotive Company (ALCO) |ordernumber = S-3374 |serialnumber = S-3374-01 – S-3374-03 |buildmodel = DH-643 |builddate = September 1964 |totalproduction = 3 |aarwheels = C-C |uicclass = C′C′ |gauge = {{track gauge|ussg|lk=on}} |length = {{convert|75|ft|10|in|m|2|abbr=on}} |locoweight = {{convert|378000|lb|kg|abbr=on}} |primemover = ALCO 251C, (x 2) |enginetype=V12 Four-stroke diesel, (x 2) |aspiration = Turbocharger |displacement = {{convert|8016|cuin|L|abbr=on}} |cylindercount = 12 (x 2) |cylindersize = {{convert|9|×|10+1/2|in|mm|0}} |transmission = Voith hydraulic |maxspeed = {{convert|77|mph|abbr=on}} |poweroutput = {{convert|4300|hp|kW|abbr=on|lk=in}} |tractiveeffort = {{convert|95000|lbf|kN|2|abbr=on|lk=on}} | locobrakes =Straight air | trainbrakes =Air |operator = Southern Pacific Railroad |fleetnumbers = 9018–9020 (later 9150–9152; final 9800-9802) |locale = North America |scrapdate = 1973 }} The ALCO C-643DH, also known as the Century 643DH, was a twin-engine diesel-hydraulic locomotive, the first diesel-hydraulic road switcher built in the United States. It had a C-C wheel arrangement and generated {{convert|4300|hp|lk=in}}. Only three were built, all for Southern Pacific Railroad in 1964 (#9018–#9020). The Alco C-643DHs joined 21 Krauss-Maffei ML-4000 diesel-hydraulics already on the Southern Pacific's roster. These hydraulic-drive diesels spent most of their service lives in the flat San Joaquin Valley in California. Dissatisfaction over the poor performance of diesel-hydraulic locomotives, as well as their use of foreign-made components (the hydraulic transmission was of German Voith design), eventually led Southern Pacific to scrap the C-643DHs in 1973. Original owners
See also
References
0-916374-81-5}}
0-930742-15-X}}
0-930742-23-0}} External links
8 : ALCO locomotives|Diesel locomotives of the United States|C-C locomotives|Southern Pacific Railroad locomotives|Experimental locomotives|Railway locomotives introduced in 1964|Standard gauge locomotives of the United States|Scrapped locomotives |
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