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2. 4-8-6 - Wikipedia

   en.wikipedia.org/wiki/4-8-6

   Swiss classification: 4/9; This wheel arrangement was proposed by Lima Locomotive Works in 1949 as a continuation of their "Super Power" concept, essentially an expansion of the 4-8-4. A larger firebox similar to the ones on the 2-6-6-6 locomotives built by Lima would have been fitted, allowing for greater power at speed. Despite promotion by ...

3. Southern Pacific GS-6 class - Wikipedia

   en.wikipedia.org/wiki/Southern_Pacific_GS-6_class

   The Southern Pacific Class GS-6 is a class of semi-streamlined 4-8-4 "Northern" type steam locomotive operated by the Southern Pacific Railroad (SP) from 1943 to 1958 and the Western Pacific Railroad (WP) from 1943 to 1953. A total of sixteen were built by the Lima Locomotive Works, numbered 4460 through 4469 by SP and 481 through 486 by WP. GS ...

4. Southern Pacific 4460 - Wikipedia

   en.wikipedia.org/wiki/Southern_Pacific_4460

   The GS-6 is a semi-streamlined 4-8-4 "Northern" type steam locomotive. GS stands for "Golden State" or "General Service". The locomotive was built by the Lima Locomotive Works (LLW) for the Southern Pacific Railroad (SP) in 1943. The GS-6 lacked side skirting and red and orange "Daylight" paint found on previous locomotives of the GS class and ...

5. List of most powerful locomotives - Wikipedia

   en.wikipedia.org/wiki/List_of_most_powerful...

   Steam 6-4-4-6: 487 tonnes (537 short tons) 76,403 pounds-force (340 kN) 7,200 horsepower (5,369 kW) Fast passenger steam locomotive; the magazine Popular Mechanics cites 1941 a speed of 133.4 mph (214.7 km/h) PRR S2: Pennsylvania Railroad: 6200 Baldwin Locomotive Works: 1944 Steam turbine direct-drive 6-8-6: 470 tonnes (518 short tons)

6. Pennsylvania Railroad class S2 - Wikipedia

   en.wikipedia.org/wiki/Pennsylvania_Railroad_class_S2

   The locomotive's problems, the rapid decline of PRR's ridership since 1947 and the advantages of the emerging diesel locomotive ensured that #6200 would never be duplicated, but S2 still participated in the 1948 Chicago Railroad Fair with a T1 4-4-4-4 Duplex Steam Locomotive. [1] In August 1949, the locomotive suffered severe turbine damage.

7. 6-4-4-6 - Wikipedia

   en.wikipedia.org/wiki/6-4-4-6

   The Pennsylvania Railroad's lone S1 was the only 6-4-4-6 ever constructed. A 6-4-4-6 steam locomotive, in the Whyte notation for describing locomotive wheel arrangements, is one with six leading wheels, two sets of four driving wheels, and six trailing wheels. Other equivalent classifications are:

8. 4-8-4 - Wikipedia

   en.wikipedia.org/wiki/4-8-4

   Union Pacific 844, the only steam locomotive never retired by a North American Class I railroad. The 4-8-4 wheel arrangement was a progression from the 4-8-2 Mountain type and, like the 2-8-4 Berkshire and 4-6-4 Hudson types, an example of the "Super Power" concept in steam locomotive design that made use of the larger firebox that could be supported by a four-wheel trailing truck, which ...

9. 4-8-4+4-8-4 - Wikipedia

   en.wikipedia.org/wiki/4-8-4+4-8-4

   There were only two classes of 4-8-4+4-8-4 steam locomotives worldwide, all of which were constructed by Beyer, Peacock & Company, the owners of the Garratt patent. [1]The predecessor 4-8-2+2-8-4 Double Mountain was likely the optimal Garratt wheel arrangement, with the four-wheeled leading bogies and the two-wheeled trailing trucks on each engine unit ensuring stability at speed and with ...