Firebox was loaded with supplemental heating surface. In addition to the firebox area of 272 sq ft, R-1s had 127 sq ft in the combustion chamber and 168 sq ft in thermic syphons in both the firebox and combustion chamber.
Had all the latest features including cast-steel frame and roller bearings on the driving axles. Baldwin overestimated the amount of counterbalancing these engines required, which led to pounding at high speeds. In fact, says http://www.awod.com/galery/rwav/whodom/back.html, at high speed "...the main drivers actually left the rails and repeatedly slammed back down, kinking rails and damaging track alignment for miles." It took time, but eventually the solution was found in reducing the counterbalancing.
Six of the class (1800-1801, 1806-1809) ran even more smoothly once they were fitted with lightweight pistons by Timken, piston rods, cross heads, and, probably most important, tapered main rods with roller bearing wrist pins.
The website (consulted in Sept 2001) says that these engines easily hit 90 mph in passenger service and probably topped 100 at times. In fast freight service, an 1800 was rated at 6,200 tons on the Richmond-Jacksonville main line.
Don Ball (Portrait of the Rails, 1972) says: "An engine I regret never having seen ...This Baldwin, judging from photos, had to be about the most handsome steam power in the south." Retired in 1951-1952.
| Specifications | |
|---|---|
| Class | R-1 |
| Locobase ID | 238 |
| Railroad | Atlantic Coast Line (ACL) |
| Whyte | 4-8-4 |
| Road Numbers | 1800-1811 |
| Gauge | Std |
| Builder | Baldwin |
| Year | 1938 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 20.75' |
| Engine Wheelbase | 47.75' |
| Ratio of driving wheelbase to overall engine wheebase | 0.43 |
| Overall Wheelbase (engine & tender) | 97.92' |
| Axle Loading (Maximum Weight per Axle) | 65792 lbs |
| Weight on Drivers | 263127 lbs |
| Engine Weight | 460270 lbs |
| Tender Light Weight | 435000 lbs |
| Total Engine and Tender Weight | 895270 lbs |
| Tender Water Capacity | 24000 gals |
| Tender Fuel Capacity (oil/coal) | 27 tons |
| Minimum weight per yard of rail on which locomotive could run | 109.64 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 80" |
| Boiler Pressure | 275 psi |
| Cylinders (dia x stroke) | 27" x 30" |
| Tractive Effort | 63901 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.12 |
| Heating Ability | |
| Firebox Area | 568 sq. ft |
| Grate Area | 97.75 sq. ft |
| Evaporative Heating Surface | 4753 |
| Superheating Surface | 1425 |
| Combined Heating Surface | 6178 |
| Evaporative Heating Surface/Cylinder Volume | 239.08 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 26881.25 |
| Same as above plus superheater percentage | 33081.60 |
| Same as above but substitute firebox area for grate area | 192228.65 |
| Power L1 | 37658.21 |
| Power MT | 1262.08 |
| This page last modified: . | [Contact] | All material © 1999-2008 SteamLocomotive.com |