New York Central Niagara

The first Niagara was Class S-1a No. 6000, delivered in March, 1945; the S-1b's (6001-6025) were delivered in 1945 and 1946. All S-1's were equipped with Baker valve gear, but S-1a No. 6000 was built with 75 in. driving wheels. It later received 79 in. wheels like the S-1b's were built with, as well as an increased boiler pressure of 290 psi. This was to maintain the S-1a's initially higher tractive effort and compare boiler efficiencies with the S-1b. The last Niagara, also delivered in 1946 as the New York Central's last steam locomotive, was Class S-2a No. 5500, dubbed the "Super Niagara." The locomotive was mechanically identical to the S-1b's, but instead of Baker gear and piston valves, it had Franklin oscillating-cam poppet valves. This application of the "Franklin System of Steam Distribution" was very similar to the existing Type A, but a different valve layout lead to the official designation of FSSD or Franklin Type A1. The Niagaras did not have steam domes, as did most steam locomotives, which resulted in a smooth contour along the top of the boiler. A perforated pipe collected steam instead. This was necessary because of the lower loading gauge (height clearance restrictions) of the New York Central (15 ft 2 in versus {{convert|16|ft|2|in|m|abbr=on}} for other American railroads), particularly east of Buffalo."Know Thy Niagaras", by Thomas R. Gerbracht (New York Central System Historical Society).

These locomotives had a small water capacity (18,000 US gallons; 68,000 liters) in the tender, because the New York Central was one of the few railroads in North America which used track pans. This allowed a larger coal capacity—46 tons—so the Harmon, New York to Chicago run (928.1 miles) could be done with one stop for coal. The stop was at Wayneport, New York: 14 miles east of Rochester, which left 602.2 miles to Chicago via the Cleveland lakefront. This worked with the 46-ton coal capacity of the PT tenders, though coal was fairly low in the tenders by the time La Salle Station was reached, with an approximate mileage of 15 miles per ton of coal for such a high-horsepower steam locomotive. To fit within the existing turntables, the tender had an overhang of over 9 feet beyond the last pair of wheels.

On test these locomotives reached {{convert|6600|hp|abbr=on}} in the cylinders, and ran 26,000 miles per month.

• Cylinders:
• Bore and stroke: 25½×32 inches (648×813 mm)
• Driving wheel diameter: {{convert|79|in|m}}
• Boiler pressure: 275 lbf/in² (1.90 MPa)
• Tractive effort: 61,570 pounds-force (273.9 kN)
• Axle load: 32 long tons (32.5 t)
• Valve gear: Baker valve gear
• Total length: {{convert|115|ft|5+1/2|in|m}}
• Total weight: 405 long tons (411 t)

All bearings were either roller bearings or needle rollers.

The six days per week running schedule of these locomotives meant that all of the maintenance work normally done over the course of that week would have to be done on one day. This meant a specialized system was developed, where men in "hot suits" (asbestos heat-resistant coveralls) entered the firebox while the locomotive was still in steam and cleared all of the tubes, repaired the brick arch, etc. As the temperature inside the firebox itself would have been well over {{cvt|212|F|C|abbr=on}} and the working area was the still-hot firebars of the grate, all references describe these workers as 'heroic'.{{Cite book|title=The Great Book of Trains|last=Brian Hollingsworth and Arthur Cook|publisher=Bedford Editions Salamander Books|year=1987|pages=172–173}}

This type of intensive maintenance was studied by steam locomotive designers such as Andre Chapelon, Livio Dante Porta and David Wardale. These designers based their modern steam locomotives on the experience gained with these Niagara-class locomotives: reliability and a close attention to details, leading to a reduction in maintenance costs.

All 27 locomotives received weekly maintenance at Harmon, while overhauls were carried out at Beech Grove in Indiana. Despite the size limitations imposed on the design, the Niagaras were the largest locomotives on the New York Central, and Beech Grove was the only shop on the railroad that could accommodate them. Their high utilization resulted in somewhat frequent overhauls. 1950 and 1951 each saw 15 Niagaras overhauled, but the total number of overhauls undertaken in the former year was 16 due to S-1b No. 6006 receiving Class 3 repairs twice during that year.{{Cite web |last=Gerbracht |first=Thomas R. |title=Know Thy Niagaras, p. 268 |url=http://anyflip.com/qswoc/nguz/basic/251-300 |access-date=2024-05-18 |website=}} The last general overhauls were completed by Beech Grove in 1953, the year steam was displaced from Harmon and the Eastern Lines of the system.

Six of these locomotives were chosen by their designer, Paul W. Kiefer, for the famous 1946 Steam Versus Diesel road trials, where the {{convert|6000|hp|abbr=on}} Niagaras were put up against some {{convert|4000|hp|abbr=on}} diesels (E7's). The locomotives were run along the {{convert|928.1|mi|km}} from New York (Harmon) to Chicago, via Albany, Syracuse, Rochester, Buffalo, Cleveland, Toledo and Elkhart, and return. The results were close:

(Note that Kiefer only claimed 5050 drawbar horsepower from a 79-inch {{whyte|4-8-4}}, and the last line (dollars/power) has been added)

The results were much closer than the diesel salesmen were comfortable with, but these steam locomotives were hampered by several factors: a series of coal miners' strikes; aggressive dieselization sales efforts; and a failure of the highly-expensive firebox-wrapper metallurgy to withstand the conditions of actual operation.

A {{whyte|4-4-4-4}} duplex drive steam locomotive based on the Niagara was planned as a true competitor to the Pennsylvania Railroad’s T1, called the C-1a, which was never built. The C-1a would have had a larger coal capacity, increased from 46 to 64 tons, an overall length of {{convert|123|ft|1+1/4|in|m|2|abbr=on}}, an overall wheelbase of {{convert|104|ft|2+1/2|in|m|2|abbr=on}}, an overall weight of {{convert|970,400|lbs|t|2|abbr=on}}, a slightly-longer PT-class centipede tender with a required extra axle, the same amount of weight on drivers, four {{convert|20|x|26|in|mm|0|abbr=on}} cylinders, boiler pressure of {{convert|290|lbf/in2|MPa|2|abbr=on}} and a tractive effort rating of {{convert|64,901|lbf|kN|1|abbr=on}}.{{cite book |first=Thomas R. |last=Gerbracht |title=Know Thy Niagaras |page=282 |url=http://online.anyflip.com/aspq/rehi/mobile/index.html#p=282}}

{{original research section|date=February 2022}}

The entire series was retired and scrapped between late 1955 and July, 1956, with #6015 the last withdrawn (S2a #5500 was retired earlier, in 1951, and served as a spare-parts supply for the other Niagaras until 1956). The reason that no NYC Niagara locomotives were preserved was due to the total pro-scrapping mentality of then-NYC President Alfred E. Perlman, who similarly ordered that every NYC Hudson be scrapped, as he disliked historic preservation"Steam Power of the New York Central System: Volume One-Modern Power", by Alvin F. Staufer (two New York Central Mohawks, L2d #2933 and L3a #3001, managed to survive by chance). As the NYC gained less than $15,000 in scrap value from Luria Brothers for each Niagara, "Know Thy Niagaras", by Thomas R. Gerbracht (New York Central System Historical Society) which cost about $248,000 each in 1945, their early retirement was a net loss overall.

{{Only primary sources|section|date=February 2025}}

• Completed in 1998 after 25 years construction, an accurate live steam replica 1/5 scale {{TrackGauge|10.25in}} gauge model of 6019 is the largest known example of this extinct class in the world and works alongside a 1/5 scale NKP Berkshire at the private Stapleford Miniature Railway in the UK.{{cite web |last= |first= |date= |title=NYC Niagara at station |url=http://www.theaylesburynews.com/images/NYC%20Niagara%20at%20station.jpg |website=www.theaylesburynews.com |location= |publisher= |access-date=5 February 2025}}Archived at [https://ghostarchive.org/varchive/youtube/20211209/kmFt5NVOb6Y Ghostarchive]{{cbignore}} and the [https://web.archive.org/web/20131019090002/http://www.youtube.com/watch?v=kmFt5NVOb6Y Wayback Machine]{{cbignore}}: {{cite AV media| url = https://www.youtube.com/watch?v=kmFt5NVOb6Y| title = Stapleford Miniature Railway | website=YouTube}}{{cbignore}}

• Pennsylvania Railroad class T1

{{reflist}}

• {{cite book|title=Steam Power of the New York Central System, Volume 1: Modern Power, 1915–1955|author=Staufer, Alvin|year=1961|publisher=Staufer}}
• https://nycshs.files.wordpress.com/2015/01/the-niagara-story.pdf
• [http://anyflip.com/qswoc/nguz Know Thy Niagaras (The Definitive Sourcebook On This Locomotive Class)]

Category:New York Central Railroad locomotives

Category:4-8-4 locomotives

Category:ALCO locomotives

Category:Steam locomotives of the United States

Category:Railway locomotives introduced in 1945

Category:Scrapped locomotives

Category:Standard-gauge locomotives of the United States