These locomotives had 60" diameter drivers, 29" x 30" cylinders, a 200 psi boiler pressure, they exerted 71,485 pounds of tractive effort and each weighed 380,000 pounds.
They were delivered with combustion chambers that permitted an increase in firebox volume while reducing the firetube length. The same 13" piston valves used in the newly minted 1601 Pacifics served the larger cylinders on these 2-10-2s. Several other components were shared by the two classes including the Jacobs-Shupert bolted fireboxes, driving-axle journals, the trailing trucks, and identical-width locomotive frames. The front truck was equalized with the first two driving axles while the trailing truck equalized with the last three driving axles. Almost all were later rebuilt with radial stay boilers and thermic siphons.
There are no surviving SL-SF 2-10-2 "Santa Fe" type locomotives.
|Qty.||Road Numbers||Year Built||Builder||Notes|
November 44405-44406, 44480
January 44831, 44904, 44924, 44930
February 45047-45048, 45059, 45080-45082, 45119-45120, 45239
March 45270-45271, 45326, 45372
July 45959-45960, 45997-45998, 46006-46007
August 46108-46109, 46168
October 46591, 46712
March 48023, 48071, 48142
May 48579, 48681, 48740, 48776
July 49230-49231, 49412
August 49484, 49667
September 49737, 49860
These Santa Fes were delivered with combustion chambers that, the article noted, permitted an increase in "furnace volume" (firebox volume) while reducing the firetube length. The same 13" piston valves used in the newly minted 1601 Pacifics (Locobase 8535) served the larger cylinders on these 2-10-2s. Several other components were shared by the two classes including the Jacobs-Shupert bolted fireboxes (that leaked, alas), driving-axle journals, the trailing trucks, and identical-width locomotive frames. The front truck was equalized with the first two driving axles while the trailing truck equalized with the last three driving axles.
Almost all were later rebuilt with radial stay boilers and thermic syphons; see Locobase 8547.
When the one and only class of Santa Fes was delivered to the St Louis-San Francisco beginning in November 1916 (see Locobase 8537), they were fitted
Some time later (Locobase's date is an estimate), all but four were rebuilt with radial-stay boilers with more conventional fireboxes. In the new vessels, the shops put two Nicholson thermic syphons. Other than the deletion of eight fire tubes, the rest of the design was left pretty much as is. Over the course of their careers, nine (8, 23,29, 32, 33, 44, 45, 52, 53) were fitted with Walschaert valve gear.
34 were later described as having been rebuilt beginning in 1936 as 4-8-2s, but Jim Quarles in a 1996 article entitled "Those Magnificent, Distinctive, Homebuilt, Frisco Mountains" (published on the web at http://home.mchsi.com/~zquarles/friscomountains.htm, accessed 7 July 2007) argues that about all that was left of the 2-10-2 in the conversion was the original builder's plate. The others were all scrapped between November 1940 and May 1945.
|Specifications by Steve Llanso of Sweat House Media|
|Class||1 - Jacobs-Shupert||1 - radial-stay|
|Railroad||St Louis-San Francisco (Frisco/(SLSF)||St Louis-San Francisco (Frisco/(SLSF)|
|Number in Class||60||56|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||21 / 6.40||21 / 6.40|
|Engine Wheelbase (ft / m)||39.08 / 11.91||40.50 / 12.34|
|Ratio of driving wheelbase to overall engine wheebase||0.54||0.52|
|Overall Wheelbase (engine & tender) (ft / m)||76.29 / 23.25||76.29 / 23.25|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||296,000 / 134,264||318,260 / 144,360|
|Engine Weight (lbs / kg)||380,000 / 172,365||411,300 / 186,563|
|Tender Loaded Weight (lbs / kg)||189,600 / 86,001||194,900 / 88,405|
|Total Engine and Tender Weight (lbs / kg)||569,600 / 258,366||606,200 / 274,968|
|Tender Water Capacity (gals / ML)||10,000 / 37.88||10,000 / 37.88|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||18 / 16.40||18 / 16.40|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||99 / 49.50||106 / 53|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||60 / 1524||60 / 1524|
|Boiler Pressure (psi / kPa)||200 / 13.80||200 / 13.80|
|High Pressure Cylinders (dia x stroke) (in / mm)||29" x 30" / 737x762||29" x 30" / 737x762|
|Tractive Effort (lbs / kg)||71,485 / 32425.09||71,485 / 32425.09|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.14||4.45|
|Firebox Area (sq ft / m2)||352.50 / 32.76||409.80 / 38.09|
|Grate Area (sq ft / m2)||76.20 / 7.08||76.20 / 7.08|
|Evaporative Heating Surface (sq ft / m2)||5125 / 476.30||5067 / 470.91|
|Superheating Surface (sq ft / m2)||1233 / 114.59||1233 / 114.59|
|Combined Heating Surface (sq ft / m2)||6358 / 590.89||6300 / 585.50|
|Evaporative Heating Surface/Cylinder Volume||223.46||220.93|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||15,240||15,240|
|Same as above plus superheater percentage||18,136||18,288|
|Same as above but substitute firebox area for grate area||83,895||98,352|