Going back to the Berskhire wheel arrangement, there were quite a few famous members of that wheel arrangement. Of course, the Van Sweringen Berkshires (NKP, Erie, Pere Marquette, Wheeling & Lake Erie, C&O) have always been quite famous for their performance and clean appearances. The Virginian 2-8-4s have a fringe fame, since they were exact copies of the C&O design. Louisville & Nashville's "Big Emmas" held the crown for being the most expensive 2-8-4s built and for modernizing the L&N's somewhat antiquated and lightweight steam fleet. The Boston & Albany's were known for being the first and the originator of the wheel arrangement. Boston & Maine's have a cult following because of that weird externally-mounted Coffin feedwater heater. But there were some other ones that were truly obscure and rarely photographed. Interesting to note is that almost all of these were of the 63"-drivered variants. The 69/70"-drivered Berkshires tended to be much more successful, since the larger drive wheels allowed faster running speed for extended periods of time, which took advantage of the larger firebox afforded by the 4-wheel trailing truck.
Detroit, Toledo & Ironton purchased 6 Berkshires from in the '30s, with 4 in '35 and 2 more in '39. Interesting that they purchased Berkshires at this point, since the DT&I was under the control of the PRR at that point, and the PRR was never a fan of 2-axle trailing trucks. The PRR had already sold some H-series Consolidations to the DT&I, and it's surprising they didn't transfer a few more of those, or maybe even some L1 Mikados or I1 Decapods instead. They became preferred locomotives on the south end of the line over Summit to Glen Jean, Greggs, and Jackson. because of their superior performance in handling coal and ore drags, but there were problems with the design, at least as far as their service on the DT&I was concerned. The railroad was too narrow in places and much of the right of way had badly conditioned ties, and the four-wheel Commonwealth trailing truck proved troublesome in yard switching duty with its high axle loadings, while the large twelve wheel tender was a problem on light rails of passing sidings and yard trackage. The verdict on the all-weather cabs split down a seasonal divide: in the winter they were great, but "summer was dreaded. Crewmen would open all the doors and windows and even wore an extra set of coveralls to protect them from the intense heat in the cabs. They were handsome engines, with Coffin internal feedwater heaters, embossed steel emblems on the tender, center headlights, covered air pumps and an interesting pilot.
One of the more camera-shy variants, the Chicago & North Western purchased 12 of the wheel arrangements in 1927, which were built by Lima and bore a strong mechanical resemblance to the Boston & Albany's A-1-c Berkshires. Appearance-wise, they were pure C&NW, with a centered headlight, bell mounted above the headlight, and a Mars light at the top of the smokebox, and the twelve were classed as J-4s. Photos of them are rare and mentions of their actual performance are even rarer, but they were retired in 1950, which seems to indicate that, while not an outright failure, they weren't worth holding onto until the end of steam.
The Toronto, Hamilton & Buffalo (which reached neither Toronto nor Buffalo) was owned by New York Central (73%) and Canadian Pacific (27%) and used to cross the NY/Canada border at the northwestern end of NY state. Since the NYC had majority ownership, lots of TH&B motive power was NYC castoffs, including a couple of those famed NYC Hudsons, but there was some new design equipment as well. TH&B traffic up the Niagara Falls Escarpment entailed scaling a 1.04% grade for 4.41 miles and existing Consolidations couldn't manage the loads. Tests with a New York Central Mikado and a Boston & Albany Berkshire led the railroad to opt for the latter but there was a hitch. For reasons of economy, mainly taxes, it was decided to build the locomotives in Canada, but Lima had no Canadian subsidiary so tooling would have been prohibitively expensive for such a small order. As luck would have it Alco had just finished an order for 12 Berkshires of their own design for the aforementioned C&NW, so the patterns were promptly rushed to MLW Alco's Canadian wing. By "small order", I mean two locomotives, the only engines of that wheel arrangement ordered by a Canadian railroad. Not long after the TH&B put the pair in service, however, they found their low factor of adhesion limited them to a 2,450 ton train load limitation without a helper engine and so, to address that issue as well as problems with slippage and stalling when starting from rest, the shops installed Franklin trailing truck boosters in August 1929. After a 25-year career, the two As were the last freight steam to operate on the TH&B. Both engines went to the scrapper in November 1953.
The Santa Fe was no stranger to Lima's "Superpower" concept, although their examples all came from Baldwin; the 84"-drivered, 300psi 3460-series Hudsons, the legion of tireless 2900- and 3700-series Northerns, and those tremendous 73"-drivered 5011-series Texas-types. But, in 1927, ATSF also had Baldwin build them fifteen 2-8-4s. Yes, the ATSF is not a railroad that comes to mind when the Berkshire wheel arrangement is mentioned, and that's because these were relatively underwhelming engines. The most damning statement I've heard of them was that they were "1923 engines with a 1927 wheel arrangement." Essentially a Mikado with a two-axle trailing truck grafted under it because that was the newest wheel arrangement, they lived 27 year careers but were rarely photographed and rarely mentioned. The ATSF also ended up with some used B&M 2-8-4s at the end of WWII, which they restyled to look more like conventional ATSF power, but those were also poor performers, which was why Boston & Maine was happy to foist them off on ATSF and SP, and go largely unspoken of.
Extremely difficult to find photos of, this is one of the Norfolk Southern's "pocket Berkshires" working in it's second life for the Nacionales de Mexico. These five locomotives were designed specifically for use on the (original) Norfolk Southern, which could only handle a maximum axle weight of 50,000 pounds. These Berkshires were essentially a Mikado with an extra trailing axle to reduce the axle loadings, and they had 63" diameter drivers, 23.5" x 30" cylinders, a 250 psi boiler pressure, and exerted 49,300 pounds of tractive effort. Each weighed 335,400 pounds, making them the smallest and lightest Berkshires built. Rather modern for their size, they had nickel steel boilers, Hichen type tenders, and the front pair of main drivers were equipped with the Alco Lateral Motion driving box that reduced the rigid wheel base to 11-feet in order to better negotiate the 10 degree curves between Colon and Mount Gilead. They were the first and only stoker-equipped locomotives owned by Norfolk Southern and served a crucial role during WWII, but were disposed off around 1949-1950, heading down to Mexico to join other American expatriates, like Flagler-era FEC 4-8-2s, D&RGW narrow-gauge 2-8-0s and Nickel Plate Mikados, and some of them ran there until as late as 1962.
Perhaps the most camera-shy were the Richmond, Fredericksburg & Potomac's 10 Lima-built Berkshires that were purchased in '43, and were the rare case of a short-lived and obscure 69"-drivered Berkshire. Purchased strictly because of the drought of diesels in WWII, these were essentially reprints of the NKP/PM design, and were likely well-suited to the RF&P's high speed bridge line nature. Leased briefly by the PRR in 1950 and again in '51, they were retired and scrapped by '52, at less than 10 years old.
Missouri Pacific owned locomotives of 14 different wheel arrangements, so the fact that they had Berkshires shouldn't be too much of a surprise, but they were still rarely-seen machines. In 1928, MP ordered 5 Alco-built 63"-driver Berkshires for subsidiary International-Great Northern, with Walschaerts valve gear, Worthington 4 1/2 BL feedwater heater, Chambers front-end throttle, Alco Type G power reversing gear, Franklin trailing truck booster, and Dupont Simplex mechanical stokers. They performed fairly well and in 1930, Missouri Pacific received another 15 engines for themselves, but these were built by Lima. They still used Walschaerts valve gear, which was unusual, since Lima preferred to use Baker valve gear on their engines. These vanished between '40 and '42 though, when MP rebuilt all of them into 75"-drivered Northerns. Like a lot of WWII-era "rebuilds", how much of the original Berkshire was reused is debated, but it's noted that "practically complete boilers were constructed at the Sedalia shops ...". In addition, "new [General Steel Castings] cast-steel bed frames with integral cylinders [were] applied, also new and larger driving wheels, roller bearings, new valve gear and rods, and larger tenders installed." Which makes it sound like just the boiler course with the serial number was reused to get around wartime restrictions, and maybe some of the appliances.
Illinois Central was another railroad that largely avoided the 2-axle trailing truck, preferring 4-8-2 and 2-10-2s and 4-6-2s to Northerns, and Texas-types, and Hudsons. But they did roster a batch of 51 "Lima-types", as they called them, which included the very first 2-8-4 built. Lima had built the original prototype and it had demonstrated on the NYC's Boston & Albany and impressed the NYC very much and the NYC promptly ordered 25 identical engines, followed by another thirty over the years, from Lima. Lima then took the first prototype, Lima #1., on the road and Illinois Central proceeded to order 50 identical engines in 1925, followed by the prototype itself in 1926. They looked unlike anything else the IC owned, with the big brooding Elesco horizontal feedwater heaters slung out over the smokebox and long boiler tube pilot. IC was not impressed with them in the long run, as a historian noted that "they rode poorly above 40 mph, sometimes so roughly that the reverse gear wheel would suddenly spin into full forward gear. When that happened the throttle had to be closed at once and the valve gear returned to the proper position -- and several engineers broke an arm doing so. The trailing truck also had a tendency to derail when backing up." In 1939, the IC ran the entire class through a rebuild that yanked off the Elesco feedwater heaters, swapped on the traditional IC pressed-steel pilot, ditched the air pump shields, swapped the new Type E superheaters for the older Type A design, reduced piston diameter by 1" and fudged with the spring rigging. The result was a reportedly better performing engine, but one that obliterated their original identity, making them look like the rest of IC's power.
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