Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 9, p. 221. Baldwin works number was 4909 in December 1879.
Adhesion-first tank engines came in two sizes: small, for industrial, lumber, or narrow-gauge use, or larger, main-line engines for local passenger traffiic. The 27 was one of the latter.
The A & C Air Line represented an amalgamation of several Georgia and North Carolina "air lines". Its 268 miles embodied (in order of original incorporation or charter): Georgia Air Line Railroad and Air Line Railroad Company in South Carolina, which were consolidated in 1870 to form the Atlanta & Richmond Air-Line Railway, which was foreclosed in 1876 and distributed to purchasers in Georgia, North Carolina, and South Carolina as their respective Air-Line Companies.
At the very end of December 1879, the Richmond & Danville began operating the A & C property and ran it until the Southern took over the bankrupt R & D in 1894. The 27 followed the ownership and was eventually renumbered 1315 by the Southern.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Tallulah |
| Locobase ID | 11762 |
| Railroad | Atlanta & Charlotte Air Line (SRS) |
| Country | USA |
| Whyte | 0-4-4T |
| Number in Class | 1 |
| Road Numbers | 27 / 1315 |
| Gauge | 5' |
| Number Built | 1 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1879 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 21.04 / 6.41 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.33 |
| Overall Wheelbase (engine & tender) (ft / m) | 21.04 / 6.41 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 14,144 / 6415.62 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 130 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.92 / 3.33 |
| Firebox Area (sq ft / m2) | 82 / 7.62 |
| Grate Area (sq ft / m2) | 13.90 / 1.29 |
| Evaporative Heating Surface (sq ft / m2) | 777 / 72.21 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 777 / 72.21 |
| Evaporative Heating Surface/Cylinder Volume | 139.00 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1807 |
| Same as above plus superheater percentage | 1807 |
| Same as above but substitute firebox area for grate area | 10,660 |
| Power L1 | 2208 |
| Power MT | |