Chicago, Burlington & Quincy 2-6-2 Locomotives in USA-save

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Class Details by Steve Llanso of Sweat House Media

Class R-1 (Locobase 2899)

Pioneered the Prairie arrangement that would represent the Burlington's principal small freight arrangement for years. Also new to the railroad was the square-topped Belpaire firebox. These engines steamed surprisingly well on the lignite fuel.

Corbin & Kerka (1960). Some of the data comes from a 30 March 1900 Railroad Gazette article on the R class, which heralds the launch of these Burlington Prairies. They give the adhesion weight as approximately 96,000 lb and all up weight as 140,000 lb. See also locomotive diagram published on Vernon Beck's website -- http://home.earthlink.net/~vnlbeck/R/r1t.tif (accessed 22 March 2003).

Two of this class of 4 were rebuilt as 0-6-0 switchers. The other two were retired in the early 1930s.


Class R-2 (Locobase 814)

See also locomotive diagram published on Vernon Beck's website -- http://home.earthlink.net/~vnlbeck/R/r1t.tif (accessed 22 March 2003). Also see Corbin & Kerka (1960, p 94).

60 engines -- 50 from Baldwin, 10 from the shops -- were the first large class of Burlington Prairie. Seven of the Baldwins (works numbers 18794-18797, 18822-18824) were delivered to the Hannibal & St Joseph and were numbered 681-687. 40 went to the Burlington & Missouri River (18825, 18845-18848, 18867-18878, 18954-18956, 19513, 19520-19526, 19574-19577 - of these 3 were compounds.

Six were completed as Vauclain compounds (class R-2-C); they had 16" HP and 27" LP cylinders. The design had the distinctive square-topped Belpaire firebox; steam was admitted through 12" piston valves. All were later rebuilt as G-8 0-6-0 switchers in the late 1930s.


Class R-3 (Locobase 1040)

Data from a locomotive diagram published on Vernon Beck's website -- http://home.earthlink.net/~vnlbeck/R/r3t.tif (accessed 22 March 2003) and Corbin & Kerka (1960). Works numbers 20859-20862 in August 1902; 20914-20916, 20957-20959, 20994, 21007, 21015, 21021-21023 in September 1902; 21069-21073, 21113, 21140-21142, 21152, 21160-21161, 21173 in October 1902; 21205-21208, 21222-21225, 21254-21257, 21288, 21299-21302 in November 1902; 21378-21379 in December 1902; and 21436 and 21543 in January 1903.

50 larger mixed-traffic Prairies that followed the R-2s, but retained the Belpaire firebox, 12" piston valves, and upright cylinder arrangement. Tubes were longer than those of the R-2.

Retired as Prairies in 1928-1930; many converted to 0-6-0 switchers.


Class R-4 (Locobase 1041)

Corbin & Kerka (1960); data corrected by table in AERJ June 1906 for "1950" (a Brooks engine); further amended by CB&Q 3 -1953 diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. (See also data from a locomotive diagram published on Vernon Beck's website -- http://home.earthlink.net/~vnlbeck/R/r4a.tif (accessed 22 March 2003) and "Heavy Passenger Locomotive", American Engineer and Railroad Journal, Volume 78 (September 1904), pp. 356-357; "Prairie-Type Freight & Passenger Locomotive-Chicago, Burlington & Quincy Railway," American Engineer and Railroad Journal, Volume 79 (March 1905), pp. 78-80.

140 Prairies altogether, built by Baldwin (1900-1939, 2000-2049) and Brooks (1940-1989). Baldwin 24436, 24456-24459, 24463-24466; 24474, 24477-24478; 24485-24488; 24492-24497; 24505-24506; 24511-24514 in July1904; 24528-24529, 24537-24538, 24542-24543, 24552, 24557,

24568-24569, 24601-24602, 27244-27251, 27271-27272, 27286-27290, 27305-27309, 27337, 27357-27359, 27371-27374, 27388-27390, 27403 in January 1906, 27418-27420; 27421, 27456-27459; 27495-27498; 27509-27511; 27539-27540, 27558 in February.

Brooks works numbers were 30396-30415 in January 1905; 30416-30445 in February.

Design replaced Belpaire firebox with conventional one. Also, the cylinders canted inward (seen from in front) so that the 12-in piston valves were inboard of the drivers and run with inside valve gear. Moreover, some had 25" diameter cylinders and a lower boiler pressure of 165 psi.

Some rebuilt with Walschaerts gear and 25" x 28" cylinders, and some were converted to 0-6-0s. Others carried on until the early 1950s.


Class R-4A - Emerson (Locobase 7695)

Data from CB&Q 3 -1953 diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

In rebuilding the R-4 Prairies (Locobase 1041) with superheaters, the Burlington chose to equip some with Schmidt, some with Emerson superheaters. (See Locobase 5456 for the Schmidt variant.)

The subject of the current entry is the rebuilt R-4 with an Emerson superheater. Compared to the Schmidt variant, the Emerson has fewer superheater flues and a smaller area. (R-5As with an Emerson superheater -- Locobase 7696 -- had four more 2 1/4" tubes). The firebox heating surface included 33.4 sq ft in 4 arch tubes. Also, some of the rebuilt engines retained their 22" cylinders and 200-psi pressure setting while others increased cylinder diameter to 25" and reduced the boiler pressure to 165 psi. All leading truck wheels saw their diameters decrease from 37 1/4" to 33".


Class R-4A/R-5A - Schmidt (Locobase 5456)

Data from a locomotive diagram published on Vernon Beck's website -- http://home.earthlink.net/~vnlbeck/R/r4a.tif (accessed 22 March 2003). Amended by CB&Q 3 -1953 diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

These are the superheated rebuilds of the R-4 and R-5 Prairies (Locobases 1041, 2900, and

7697). Firebox heating surface included 4 arch tubes with a total of 33 sq ft. The result was three sub-types. The one in the present entry reflects a common design using the Schmidt Type A superheater. The other two (Locobase 7695 & 7696)-- reflecting the introduction of an Emerson superheater -- differed in size from the R-4 to the R-5.

Once converted, the class carried on in light freight work until the end of steam in some cases.


Class R-5 - BLW (Locobase 2900)

Corbin & Kerka (1960); data corrected by table in AERJ June 1906 for "1950" (a Brooks engine); further amended by CB&Q 3 -1953 diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. (See also data from a locomotive diagram published on Vernon Beck's website -- http://home.earthlink.net/~vnlbeck/R/r4a.tif (accessed 22 March 2003). Baldwin works numbers were 28396-28397, 28420-28421, 28426-28427, 28449, 28459, 28472, 28487, 28490 in June 1906; 28503-28507, 28536-28539, 28546-28547, 28569, 28580, 28590, 28595-28597, 28610, 28628, 28647, 28653, 28662, 28672, 28681-28682 in July; 28703, 28720-28723, 28754-28755, 28778-28779, 28798, 28821, 28831, 28864, 28900 in August.

175 R-5s -- 2055-2224, built by Baldwin and Alco-Brooks in 1906-1907 -- had a only slightly larger boiler, but were otherwise similar to the R-4s (Locobase 1041). The firebox heating surface included 33.4 sq ft in 4 arch tubes.

Baldwin delivered two superheated locomotives within this batch as trial horses for the Schmidt superheater, much as they had with a single Prairie sent to the Great Northern at the same time (see Locobase 8388). Numbered 2098-2099, they had 157 small tubes and 32 5 1/2" superheater flues. Cylinder diameter increased to 25 1/4" and boiler pressure remained set at 210 psi; however, the Baldwin spec shows a tractive power estimate of 22,800 lbs. See the DeGolyer holding, Volume 29, p. 48-49.

Some rebuilt with Walschaerts gear, and some were converted to 0-6-0s. Others were superheated; see Locobase 5456.

Many were scrapped in the late 1920s-early 1930s. Others carried on until the late 1940s-early 1950s.


Class R-5 - Brooks (Locobase 7697)

Corbin & Kerka (1960); data corrected by table in AERJ June 1906 for "1950" (a Brooks engine); further amended by CB&Q 3 -1953 diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. (See also data from a locomotive diagram published on Vernon Beck's website -- http://home.earthlink.net/~vnlbeck/R/r4a.tif (accessed 22 March 2003).

175 R-5s -- 2055-2224, built by Baldwin and Brooks in 1906-1907 (see also Locobase 2900) were similar to the R-4s except (Locobase 1041) that this last set of 75 from Brooks had twelve more small tubes and consequently more heating surface area.

Some rebuilt with Walschaerts gear, and some were converted to 0-6-0s. Others carried on until the early 1950s.


Class R-5A - Emerson (Locobase 7696)

Data from CB&Q 3 -1953 diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

In rebuilding the R-5 Prairies (Locobases 2900 & 7697) with superheaters, the Burlington chose to equip some with Schmidt, some with Emerson superheaters. (See Locobase 5456 for the Schmidt variant.)

The subject of the current entry is the rebuilt R-5 with an Emerson superheater. Compared to the Schmidt variant, the Emerson had fewer superheater flues and a smaller area; the design had 50 sq ft (4.65 sq m) more of tube heating surface than the modified R-4 The firebox heating surface included 33.4 sq ft (3.1 sq m) in four arch tubes. Also, some of the rebuilt engines retained their 22" cylinders and 200-psi pressure setting while others increased cylinder diameter to 25" and reduced the boiler pressure to 165 psi. All leading truck wheels saw their diameters decrease from 37 1/4" to 33".

Specifications by Steve Llanso of Sweat House Media
ClassR-1R-2R-3R-4R-4A - Emerson
Locobase ID2899 814 1040 1041 7695
RailroadChicago, Burlington & Quincy (CB&Q)Chicago, Burlington & Quincy (CB&Q)Chicago, Burlington & Quincy (CB&Q)Chicago, Burlington & Quincy (CB&Q)Chicago, Burlington & Quincy (CB&Q)
CountryUSAUSAUSAUSAUSA
Whyte2-6-22-6-22-6-22-6-22-6-2
Number in Class4105014018
Road Numbers1701-17041710-17191721-1770 / 1800-18491900-1989, 2000+
GaugeStdStdStdStdStd
Number Built41050140
BuilderCB & QseveralBurnham, Williams & CoSeveralCB&Q
Year19001901190219041912
Valve GearStephensonStephensonStephensonStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase11.33'12.08'13'13.37'13.37'
Engine Wheelbase26.25'28'28.25'30.71'30.71'
Ratio of driving wheelbase to overall engine wheebase 0.43 0.43 0.46 0.44 0.44
Overall Wheelbase (engine & tender)51.96'55'62.23'62.23'
Axle Loading (Maximum Weight per Axle)48000 lbs51400 lbs51400 lbs
Weight on Drivers110270 lbs130550 lbs134550 lbs151000 lbs151000 lbs
Engine Weight151220 lbs170000 lbs181920 lbs210000 lbs210000 lbs
Tender Light Weight148500 lbs148500 lbs120400 lbs148200 lbs148200 lbs
Total Engine and Tender Weight299720 lbs318500 lbs302320 lbs358200 lbs358200 lbs
Tender Water Capacity5000 gals6000 gals6000 gals8000 gals8000 gals
Tender Fuel Capacity (oil/coal)9 tons12 tons12 tons13 tons13 tons
Minimum weight of rail (calculated)61 lb/yard73 lb/yard75 lb/yard84 lb/yard84 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter64"64"69"69"69"
Boiler Pressure190 psi200 psi200 psi210 psi165 psi
Cylinders (dia x stroke)19" x 24"20" x 24"21" x 26"22" x 28"25" x 28"
Tractive Effort21863 lbs25500 lbs28250 lbs35058 lbs35571 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.04 5.12 4.76 4.31 4.25
Heating Ability
Firebox Area139 sq. ft151.10 sq. ft151.10 sq. ft233.40 sq. ft233.40 sq. ft
Grate Area42 sq. ft42 sq. ft42 sq. ft54.25 sq. ft54.20 sq. ft
Evaporative Heating Surface2076 sq. ft2884 sq. ft3071 sq. ft3476 sq. ft2748 sq. ft
Superheating Surface596 sq. ft
Combined Heating Surface2076 sq. ft2884 sq. ft3071 sq. ft3476 sq. ft3344 sq. ft
Evaporative Heating Surface/Cylinder Volume263.59330.48294.64282.16172.74
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation798084008400113938943
Same as above plus superheater percentage7980840084001139310553
Same as above but substitute firebox area for grate area2641030220302204901445443
Power L1713188978444910211068
Power MT427.71450.74415.07398.67484.78

Specifications by Steve Llanso of Sweat House Media
ClassR-4A/R-5A - SchmidtR-5 - BLWR-5 - BrooksR-5A - Emerson
Locobase ID5456 2900 7697 7696
RailroadChicago, Burlington & Quincy (CB&Q)Chicago, Burlington & Quincy (CB&Q)Chicago, Burlington & Quincy (CB&Q)Chicago, Burlington & Quincy (CB&Q)
CountryUSAUSAUSAUSA
Whyte2-6-22-6-22-6-22-6-2
Number in Class2910075
Road Numbers2050-21492150-2224
GaugeStdStdStdStd
Number Built10075
BuilderCB&QBurnham, Williams & CoAlco-BrooksCB&Q
Year1912190619061912
Valve GearWalschaertStephensonStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase13.37'13.37'13.37'13.37'
Engine Wheelbase30.71'30.70'30.70'30.71'
Ratio of driving wheelbase to overall engine wheebase 0.44 0.44 0.44 0.44
Overall Wheelbase (engine & tender)62.23'62.23'62.23'62.23'
Axle Loading (Maximum Weight per Axle)51700 lbs51700 lbs51700 lbs
Weight on Drivers163250 lbs152000 lbs152000 lbs152000 lbs
Engine Weight233370 lbs216000 lbs216000 lbs216000 lbs
Tender Light Weight148200 lbs148200 lbs148200 lbs148200 lbs
Total Engine and Tender Weight381570 lbs364200 lbs364200 lbs364200 lbs
Tender Water Capacity8000 gals8000 gals8000 gals8000 gals
Tender Fuel Capacity (oil/coal)13 tons13 tons13 tons13 tons
Minimum weight of rail (calculated)91 lb/yard84 lb/yard84 lb/yard84 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter69"69"69"69"
Boiler Pressure200 psi210 psi210 psi165 psi
Cylinders (dia x stroke)25" x 28"22" x 28"22" x 28"25" x 28"
Tractive Effort43116 lbs35058 lbs35058 lbs35571 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.79 4.34 4.34 4.27
Heating Ability
Firebox Area230 sq. ft233 sq. ft233 sq. ft233.40 sq. ft
Grate Area54.20 sq. ft54.20 sq. ft54.20 sq. ft54.20 sq. ft
Evaporative Heating Surface2822 sq. ft3489 sq. ft3624 sq. ft2792 sq. ft
Superheating Surface682 sq. ft596 sq. ft
Combined Heating Surface3504 sq. ft3489 sq. ft3624 sq. ft3388 sq. ft
Evaporative Heating Surface/Cylinder Volume177.40283.22294.18175.51
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1084011382113828943
Same as above plus superheater percentage12900113821138210553
Same as above but substitute firebox area for grate area54740489304893045443
Power L1146179124938811120
Power MT592.19397.01408.49483.86

Reference