Central Vermont 2-10-4 "Texas" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class T-3a (Locobase 94)

Data from 1930 Locomotive Cyclopedia and confirmed by CV 1957 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 67671 in October 1928, 67672-67678 in November, 67767-67768 in December.

Firebox had 80 sq ft (7.4 sq m) of thermic syphons and 22 sq ft (2 sq m) in three arch tubes, boiler had Elesco feedwater heater, valve gear had limited cutoff. The Cyclopedia table shows Walschaert, the diagram showed Baker Long Lap valve gear.

They were relatively light, small, and low-drivered. Nevertheless, these engines rattled windows and shook the ground, according to a December 1993 Trains recollection. And they weren't kind to the rails.

Specifications by Steve Llanso of Sweat House Media
ClassT-3a
Locobase ID94
RailroadCentral Vermont (CNR)
CountryUSA
Whyte2-10-4
Number in Class10
Road Numbers700-709
GaugeStd
Number Built10
BuilderAlco-Schenectady
Year1928
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase (ft)22
Engine Wheelbase (ft)44.20
Ratio of driving wheelbase to overall engine wheebase 0.50
Overall Wheelbase (engine & tender) (ft)82.18
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)285,000
Engine Weight (lbs)419,000
Tender Loaded Weight (lbs)269,600
Total Engine and Tender Weight (lbs)688,600
Tender Water Capacity (gals)13,500
Tender Fuel Capacity (oil/coal) (gals/tons)20
Minimum weight of rail (calculated) (lb/yd)95
Geometry Relating to Tractive Effort
Driver Diameter (in)60
Boiler Pressure (psi)250
High Pressure Cylinders (dia x stroke) (in)27" x 32"
Tractive Effort (lbs)82,620
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.45
Heating Ability
Firebox Area (sq ft)423
Grate Area (sq ft)84.40
Evaporative Heating Surface (sq ft)4703
Superheating Surface (sq ft)2208
Combined Heating Surface (sq ft)6911
Evaporative Heating Surface/Cylinder Volume221.78
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation21,100
Same as above plus superheater percentage27,852
Same as above but substitute firebox area for grate area139,590
Power L131,466
Power MT1217.03

Photos

Reference