ALCO S-2 and S-4

The ALCO S2 and S4 were 1,000 horsepower (746 kW) diesel electric switchers produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). Basically, the two locomotives differed only in trucks, with the S-2 using ALCO's own "Blunt" trucks, and the S-4 riding on standard AAR type A switcher trucks. Both were powered by ALCO 539 turbocharged, 6-cylinder diesels. The S-2 was built between August 1940 and June 1950, with a total of 1502 completed, while the S-4 was constructed between June 1949 and August 1957 (MLW until 1957) with total sales of 797. Canadian production of the S-4 started more than a year before U S production of the S-4. ALCO did not start building the S-4 until August 1950. A modified version, the S-7, was built by MLW only; 29 were built between June and August 1957.

Design

The exterior of the locomotives were styled by an Alco engineer, Ray Patten, using curves in a mild application of Art Deco principles.

Identification

The S-2 and S-4 are distinguishable externally from the very similar S-1 and S-3 660 hp (492 kW) switchers in that they have a larger exhaust stack with an oblong base and a larger radiator shutter area on the nose sides. The S-1/S-3 radiator shutter area is taller than it is wide, while the S-2/S-4 radiator area is wider. The larger stack is due to turbocharging. The carbody and cab of late S-2s are nearly indistinguishable from those of S-4s. Hence, a truck swap can cause many to misidentify a unit.

S4

S4, S 4, Š-4, S.4 or S-4 may refer to:

Beginning with S4

Containing S4

Bob Lazar

Robert Scott "Bob" Lazar (/ləˈzɑːr/; born January 26, 1959) claims to have worked on reverse engineering extraterrestrial technology at a site called S4, in the Emigrant Valley and Old Kelley Mine area near the Area 51 test facility. Universities from which he claimed to hold degrees show no record of him, and the S4 site was categorized as bogus at first investigation.

Background

Education and qualifications

Lazar claims to hold degrees from the California Institute of Technology and Massachusetts Institute of Technology. In 1993, the Los Angeles Times looked into his background and found there were no records to support those claims at either institution. UFOlogist Stanton Friedman was able to substantially verify that Lazar took electronics courses in the late 1970s at Pierce Junior College in Los Angeles. His occupation was listed as a self-employed document photo processor. His educational and professional background cannot be completely verified.

Legal problems

In 1990, Lazar was arrested for aiding and abetting a prostitution ring. This was reduced to felony pandering, to which he pled guilty.