The Search for L&N 410

By | April 3, 2015

L__N_4-8-2_410_-_Copy.130201513_large LN610


Its only taken since 1989 but I finally really noticed the diagram behind J.B. King’s head. This is of Louisville and Nashville No. 410. A 4-8-2 Mountain type designated class L-1 by the Louisville and Nashville. I have begin hunting around for info on the origins of this diagram in order to find a copy for Restore The Magic and to promote both Shining Time Station and Thomas and the Magic Railroad’s ability to contribute to the railfan community at large. Any info feel free to contact Restore The Magic at

According to‘s archive

Class Qty. Road Numbers Year Built Builder
L-1 16 400-415 1926 Baldwin
L-1 6 416-421 1930 Baldwin

“Data from L & N 8-1927 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive collection, supplemented by DeGolyer, Vol 76, pp. 63+. Works numbers were 58877-58878 in December 1925, 58910-58915 in January, 59523-59527 in September, 59550-59552 in October.

Firebox had combustion chamber surface area amounting to 104 sq ft (9.67 sqm) and 28 sq ft (2.6 sq m) of arch tubes contributed to firebox heating surface area. Based on the USRA light Mountain design that saw service throughout the L&N system except for the Gulf Coast west of Mobile. The last five of the class were delivered with significant modifications to the fireboxes.

Charles B Castner in Drury (1993) tells us that the Mountains stepped right into heavy mainline passenger service between Cincinnati and Atlanta with some trains continuing on to Birmingham. Barred by bridge loading limits from operating further south, the 4-8-2s later added Louisville-East St Louis trains and even freights. They saw out steam on the L & N, retiring in the mid-1950s.”

Specifications by Steve Llanso
Class L-1 L-1 – 1930
Locobase ID 209 14353
Railroad Louisville & Nashville (L & N) Louisville & Nashville (L & N)
Country USA USA
Whyte 4-8-2 4-8-2
Road Numbers 400-415 416-421
Gauge Std Std
Builder Baldwin Baldwin
Year 1926 1930
Valve Gear Walschaert Walschaert
Locomotive Length and Weight
Driver Wheelbase 18.25′ 18.25′
Engine Wheelbase 40′ 40′
Ratio of driving wheelbase to overall engine wheebase 0.46 0.46
Overall Wheelbase (engine & tender) 75.70′ 75.70′
Axle Loading (Maximum Weight per Axle) 57400 lbs 57100 lbs
Weight on Drivers 223950 lbs 226910 lbs
Engine Weight 333100 lbs 337730 lbs
Tender Light Weight 194000 lbs 196000 lbs
Total Engine and Tender Weight 527100 lbs 533730 lbs
Tender Water Capacity 10000 gals 10000 gals
Tender Fuel Capacity (oil/coal) 16 tons 19 tons
Minimum weight of rail (calculated) on which locomotive could run 93 lb/yard 95 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter 69″ 69″
Boiler Pressure 200 psi 200 psi
Cylinders (dia x stroke) 27″ x 30″ 27″ x 30″
Tractive Effort 53883 lbs 53883 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.16 4.21
Heating Ability
Firebox Area 351 sq. ft 415 sq. ft
Grate Area 70.30 sq. ft 70.80 sq. ft
Evaporative Heating Surface 3959 sq. ft 4023 sq. ft
Superheating Surface 1078 sq. ft 1087 sq. ft
Combined Heating Surface 5037 sq. ft 5110 sq. ft
Evaporative Heating Surface/Cylinder Volume 199.14 202.36
Computations Relating to Power Output (More Information)
Robert LeMassena’s Power Computation 14060 14160
Same as above plus superheater percentage 17013 17134
Same as above but substitute firebox area for grate area 84942 100430
Power L1 17835 18373
Power MT 702.29 714.04


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