Data from AB&C 11-1930 and AB&C 6 1942 Locomotive Diagrams and Passenger Car Data books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (Thanks to Chris Hohl for pointing out some semantic problems with the first paragraph.)
When originally sold to the Florida East Coast railroad, the class of Pacifics to which this engine belonged had saturated boilers as shown in Locobase 5716. Several years before they were sold to the AB&C, the class was superheated (Locobase 3138). Then the class was sold to the AB&C.
Most remained relatively unchanged, but the 79 (works# 53908) was streamlined in December 1940 to head up the Dixie Flagler with the results as shown here. Very little on the locomotive was changed, but a skyline casing was added as well as a bullet-tipped smokebox cover. Also, the tender grew considerably and now weighed 210,500 lb (95,481 kg) when loaded with 11,000 US gallons (41,635 litres) of water and 18 tons (16.3 metric tons) of coal.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 79 - streamlined |
Locobase ID | 7609 |
Railroad | Atlanta, Birmingham & Atlantic (AB&C) |
Country | USA |
Whyte | 4-6-2 |
Number in Class | 1 |
Road Numbers | 79 |
Gauge | Std |
Number Built | |
Builder | FEC |
Year | 1913 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 12.33 / 3.76 |
Engine Wheelbase (ft / m) | 23.08 / 7.03 |
Ratio of driving wheelbase to overall engine wheelbase | 0.53 |
Overall Wheelbase (engine & tender) (ft / m) | 73.50 / 22.40 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 44,200 / 20,049 |
Weight on Drivers (lbs / kg) | 132,600 / 60,146 |
Engine Weight (lbs / kg) | 208,500 / 94,574 |
Tender Loaded Weight (lbs / kg) | 210,500 / 95,481 |
Total Engine and Tender Weight (lbs / kg) | 419,000 / 190,055 |
Tender Water Capacity (gals / ML) | 11,000 / 41.67 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 18 / 16 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 74 / 37 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 69 / 1753 |
Boiler Pressure (psi / kPa) | 210 / 1450 |
High Pressure Cylinders (dia x stroke) (in / mm) | 22" x 26" / 559x660 |
Tractive Effort (lbs / kg) | 32,554 / 14766.26 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.07 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 146 - 2" / 51 |
Flues (number - dia) (in / mm) | 21 - 5.375" / 137 |
Flue/Tube length (ft / m) | 18.75 / 5.71 |
Firebox Area (sq ft / m2) | 160 / 14.87 |
Grate Area (sq ft / m2) | 46.90 / 4.36 |
Evaporative Heating Surface (sq ft / m2) | 2111 / 196.19 |
Superheating Surface (sq ft / m2) | 442 / 41.08 |
Combined Heating Surface (sq ft / m2) | 2553 / 237.27 |
Evaporative Heating Surface/Cylinder Volume | 184.53 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 9849 |
Same as above plus superheater percentage | 11,523 |
Same as above but substitute firebox area for grate area | 39,312 |
Power L1 | 14,543 |
Power MT | 725.38 |