| ALCO RS-27 | |
| Powertype: | Diesel-electric |
| Builder: | ALCO |
| Buildmodel: | RS-27 |
| Builddate: | December 1959 - October 1962 |
| Totalproduction: | 27 |
| Aarwheels: | B-B |
| Trucks: | AAR type B |
| Wheeldiameter: | 400NaN0 |
| Minimumcurve: | 21° |
| Wheelbase: | 40feet |
| Length: | 57feet |
| Width: | 9feet |
| Height: | 14feet |
| Locoweight: | 256800lb |
| Fuelcap: | 2000usgal |
| Primemover: | Alco 251B |
| Rpmrange: | 1000 |
| Enginetype: | Four-stroke diesel |
| Aspiration: | Turbocharged |
| Displacement: | 10688cuin |
| Generator: | GE 5GT-581-B1 |
| Tractionmotors: | (4) GE 5GE-752-E3 |
| Cylindercount: | V16 |
| Cylindersize: | 9x |
| Poweroutput: | 2400abbr=onNaNabbr=on |
| Tractiveeffort: | 64200lb |
| Locale: | U.S.A. |
The ALCO RS-27 (specification DL-640) was a diesel-electric locomotive built by ALCO between December 1959 and October 1962.
Only 27 examples were manufactured.[1] With ALCO's introduction of the Century Series line in 1963, the C-424 (specification DL-640A) replaced the RS-27 in the builder's catalog. Today, the Minnesota Commercial Railway has the only two RS-27s left in existence; however both have been placed into storage.[2]
| Railroad | Quantity | Road numbers | Notes | |
|---|---|---|---|---|
| American Locomotive Company (demonstrator) | 5 | 640-1 to 640-5 | 640-1 rebuilt as C424 for Pennsylvania Railroad, 640-2 through 640-5 to Union Pacific Railroad 675–678; 678 wrecked 1969, 675–676 sold 1971 to Montreal Locomotive Works and used as lease fleet on Roberval and Saguenay Railway and British Columbia Railway, sold to Devco Railway 1974, renumbered 214-215, scrapped 1984 | |
| 4 | 900–903 | One sold to Peabody Coal, three sold to Green Bay and Western 316–318; GBW 317 scrapped, 316 and 318 to Minnesota Commercial Railway | ||
| 1 | 310 | |||
| 15 | 2400–2414 | to Penn Central and Conrail (same numbers) | ||
| 2 | 415–416 | |||
| Total | 27 |