In 1929 the Gulf, Mobile & Ohio acquired the New Orleans Great Northern.
| CN | Road Numbers | Year Built | Builder |
|---|---|---|---|
| 67316 | 400 | 1927 | ALCO |
| 67317 | 401 | 1927 | ALCO |
| 67318 | 402 | 1927 | ALCO |
Data from GM&O 5 -1945 Locomotive Diagram books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 67316-67318 in June 1927.
This Mountain trio bore the second lightest weight of any 4-8-2s supplied to a North American railroad, according to Drury. They had 14" (356 mm) piston valves. Firebox heating surface area included 24 sq ft (2.23 sq m) of arch tubes.
The NO&NE merged with the Gulf, Mobile & Northern in 1933 and these engines were renumbered in the 500 series. After World War Two, the GM&N sold the 500 to locomotive rebuilder/reseller Birmingham Rail & Locomotive. Together with Georgia Car & Locomotive, the BR&L found a new owner in the Georgia & Florida in May 1947; the G&F renumbered it 600. In October 1947, the other two engines in the class joined the 600 in October of that year.
After three years of service, all three were scrapped in October 1950.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 200 / 500 |
| Locobase ID | 6909 |
| Railroad | New Orleans Great Northern (GM&O) |
| Country | USA |
| Whyte | 4-8-2 |
| Number in Class | 3 |
| Road Numbers | 200-202, 500-502 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Alco-Richmond |
| Year | 1927 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16.75 / 5.11 |
| Engine Wheelbase (ft / m) | 37 / 11.28 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.45 |
| Overall Wheelbase (engine & tender) (ft / m) | 69.94 / 21.32 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 47,750 / 21,659 |
| Weight on Drivers (lbs / kg) | 191,000 / 86,636 |
| Engine Weight (lbs / kg) | 272,500 / 123,604 |
| Tender Loaded Weight (lbs / kg) | 175,400 / 79,560 |
| Total Engine and Tender Weight (lbs / kg) | 447,900 / 203,164 |
| Tender Water Capacity (gals / ML) | 9000 / 34.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 16 / 15 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 80 / 40 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 225 / 1550 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 24" x 28" / 610x711 |
| Tractive Effort (lbs / kg) | 48,960 / 22207.91 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.90 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 167 - 2" / 51 |
| Flues (number - dia) (in / mm) | 30 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 19.83 |
| Firebox Area (sq ft / m2) | 258 / 23.98 |
| Grate Area (sq ft / m2) | 59.90 / 5.57 |
| Evaporative Heating Surface (sq ft / m2) | 2832 / 263.20 |
| Superheating Surface (sq ft / m2) | 600 / 55.76 |
| Combined Heating Surface (sq ft / m2) | 3432 / 318.96 |
| Evaporative Heating Surface/Cylinder Volume | 193.18 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 13,478 |
| Same as above plus superheater percentage | 15,769 |
| Same as above but substitute firebox area for grate area | 67,919 |
| Power L1 | 15,345 |
| Power MT | 708.48 |