Canadian National class N-4 2-8-0

Canadian National class N-4

Canadian National Railways N4A locomotive on display at Head Lake, Haliburton, Ontario

Type and origin References:[1][2] Power type Steam Builder Montreal Locomotive Works American Locomotive Company Build date August 1906 – November 1911 Total produced 232

Specifications Configuration 2-8-0 UIC class New: 1′D n2v and 1′D h2v Rebuilt: 1′D h2 Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Driver dia. 63 in (1,600 mm) Boiler pressure 180 lbf/in^2 (1.24 MPa) Cylinders Two Cylinder size Compound HP: 22 ^1⁄2 in × 32 in (572 mm × 813 mm) Compound LP: 35 in × 32 in (889 mm × 813 mm) Simple: 23 in × 32 in (584 mm × 813 mm) Valve gear Stephenson, Walschaerts, or Young

Performance figures Tractive effort 41,000 lbf (182.4 kN)

Career Operators Grand Trunk Railway Canadian National Railway Class GT: D2 through D7, D9 and D11 CN: N-4-a through N-4-f Retired 1952–1960

Canadian National Railway (CN) Class N-4 steam locomotives were of 2-8-0 wheel arrangement in the Whyte notation, or 1′D in UIC classification. These locomotives were built for the Grand Trunk Railway (GT) from 1906 until GT began purchasing class S freight locomotives in 1913. Class N-4 were built as Richmond compound locomotives with 210 lbf/in² (1.4 MPa) boilers feeding 22 ¹⁄₂ inches (572 mm) and 35 inches (889 mm) by 32 inches (813 mm) cylinders; but most had been rebuilt as simple single expansion locomotives by GT. The most satisfactory rebuilding method was designated sub-class N-4-a by CN, and lesser numbers of sub-classes N-4-b through N-4-f represent alternative rebuilding designs. Both GT and CN took some of these rebuilding efforts out of their original numerical sequence. CN numbered class N-4-a locomotives from 2525 through 2660 and numbered the alternative rebuilding classes from 2661 through 2686. The rebuilt simplified locomotives remained in freight service until the final replacement of steam with diesel locomotives.^[1]

Number 2534 was preserved in Zwick Island Park, Belleville, Ontario (moved to Memory Junction Railway Museum in Brighton, Ontario in 1997^[3]); number 2601 in the Canadian Railway Historical Association Museum at Delson, Quebec; and number 2616 by the Kiwanis in Haliburton, Ontario.^[1]

Builder	Works numbers	Dates	GT numbers	CN numbers	Notes[1][2]
MLW	39548–39562	1906	651–665	2515–2529
MLW	40583–40622	1906	666–705	2530–2543, 2661, 2544–2551, 2662, 2552–2566, 2663
ALCO	42046–42060	1907	706–720	2669, 2567–2570, 2670–2671, 2571–2573, 2664, 2672, 2574–2576	built at ALCO's Schenectady Works
MLW	42331–42345	1907	721–735	2577-2784, 2685, 2585–2590
MLW	43150–43164	1907	736–750	2591–2605
ALCO	43540–43554	1907	751–765	2606, 2673, 2607–2608, 2674, 2609–2610, 2675, 2611–2612, 2676, 2613, 2665, 2614–2615	built at ALCO's Schenectady Works
MLW	45163–45182	1908	631–650	2627–2646
MLW	46880-46894	1910	616–630	2647–2657, 2686, 2658–2660
ALCO	49663–49674	1911	766–777	2677, 2616–2623, 2678, 2624–2625	built at ALCO's Brooks Works
ALCO	50472–50481	1911	779–787	2679, 2666, 2626, 2680–2682, 2667, 2683, 2668, 2684	built at ALCO's Schenectady Works

References

1. Clegg & Corley 1969, pp. 58, 88–89.
2. Edson & Corley 1982, pp. 108–112.
3. http://www.waymarking.com/waymarks/WMEFVB_Railroaders_Square_and_Memorial_Belleville_ON

• Clegg, Anthony; Corley, Ray (1969). Canadian National Steam Power. Montreal: Trains & Trolleys.
• Edson, William D.; Corley, Raymond F. (Autumn 1982). "Locomotives of the Grand Truck Railway". Railroad History. The Railway & Locomotive Historical Society, Inc. (147). ISSN 0090-7847.