Although counterbalancing problems (inherent in the Santa Fe wheel arrangement and driver size) limited speeds to 25 mph, these engines lasted through World War II because of their pulling power on the New Haven-Maybrook section.
Later in their careers, the class received an upgrade to their fireboxes (presented in the specifications) that included three syphons adding 154 sq ft (14.31 sq m) to the direct heating surface area. (Others were fitted with four Security Circulators that increased DHS by 58 sq ft/5.39 sq m to 337 sq ft/31.31 sq m.) The firebox kept its Gaines fire box arch and the LT-1 Conversion stoker. The boiler now had a feed water heater.
By the time of the diagram, the New Haven had beefed up its Santa Fe's direct heating surface by adding 156 sq ft (14.5 sq m) of thermic syphons. And the diagram makes great claims for the potency of syphons as water evaporators. Each square foot of tube is credited with making 9.29 lb/hour steam per hour. The larger flues come in at 10.44 lb/hour. But the syphons perform at 55 lb/hour/sq ft, the same as the firebox as a whole.
As a result, maximum water evaporation reached 62,060 lb/hour; 23,100 lb/hour (37.2%) of the total came from direct heating surfaces. Steam consumption by those large cylinders was calculated at 67,500 lb/hour and boiler factor at that rate was 91.8%.
Locobase 81 shows the original configuration of these low-drivered Santa Fes. The current entry details one of two upgrades applied to the class later in its career. "Security circulators" were T-shaped water tubes that extended into the firebox and added (in this case) 54 sq ft of heating surface to the firebox. Although quite different from the layout created by the installation of thermic syphons in locomotives described in Locobase 8121, the water evaporation rate wasn't that different. The maximum rate of 60,625 lb/hour included 18,535 lb/hour (30.6%) from direct heating surfaces, a lower percentage that that achieved by thermic syphons. In any case, the boiler could be overmatched by maximum steam consumption demands of 67,500 lb/hour, which yielded an 89.8% boiler factor.
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Class||L-1||L-1 - with 3 syphons||L-1 - with 4 circulators|
|Railroad||New Haven (NYNH&H)||New Haven (NYNH&H)||New Haven (NYNH&H)|
|Number in Class||50||50||50|
|Road Numbers||3200-3249||3200-3249||3206-07, 3238, 3244-3245|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||22.50 / 6.86||22.50 / 6.86||22.50 / 6.86|
|Engine Wheelbase (ft / m)||40.60 / 12.37||40.60 / 12.37||40.60 / 12.37|
|Ratio of driving wheelbase to overall engine wheebase||0.55||0.55||0.55|
|Overall Wheelbase (engine & tender) (ft / m)||74.75 / 22.78||74.73 / 22.78||74.73 / 22.78|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)||62,120 / 28,177||62,120 / 28,177||62,120 / 28,177|
|Weight on Drivers (lbs / kg)||299,210 / 135,720||299,210 / 135,720||299,210 / 135,720|
|Engine Weight (lbs / kg)||360,735 / 163,627||360,735 / 163,627||360,730 / 163,625|
|Tender Loaded Weight (lbs / kg)||202,000 / 91,626||202,000 / 91,626||194,000 / 87,997|
|Total Engine and Tender Weight (lbs / kg)||562,735 / 255,253||562,735 / 255,253||554,730 / 251,622|
|Tender Water Capacity (gals / ML)||11,000 / 41.67||11,000 / 41.67||10,000 / 37.88|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||16 / 14.50||16 / 14.50||16 / 14.50|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||100 / 50||100 / 50||100 / 50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||63 / 1600||63 / 1600||63 / 1600|
|Boiler Pressure (psi / kPa)||200 / 13.80||200 / 13.80||200 / 13.80|
|High Pressure Cylinders (dia x stroke) (in / mm)||30" x 32" / 762x813||30" x 32" / 762x813||30" x 32" / 762x813|
|Tractive Effort (lbs / kg)||77,714 / 35250.52||77,714 / 35250.52||77,714 / 35250.52|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.85||3.85||3.85|
|Firebox Area (sq ft / m2)||420 / 39.02||420 / 39.03||337 / 31.32|
|Grate Area (sq ft / m2)||82 / 7.62||82 / 7.62||82 / 7.62|
|Evaporative Heating Surface (sq ft / m2)||4443 / 412.76||4443 / 412.92||4697 / 436.52|
|Superheating Surface (sq ft / m2)||1155 / 107.30||1115 / 103.62||1468 / 136.43|
|Combined Heating Surface (sq ft / m2)||5598 / 520.06||5558 / 516.54||6165 / 572.95|
|Evaporative Heating Surface/Cylinder Volume||169.71||169.71||179.41|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||16,400||16,400||16,400|
|Same as above plus superheater percentage||19,844||19,680||20,336|
|Same as above but substitute firebox area for grate area||101,640||100,800||83,576|