Data from [] . See also Zerah Colburn, "The Don Juan," Grolier Club Exhibitions, accessed July 27, 2025, [].
Zerah Colburn drew a detailed elevation of this freighter at some point in the early 1850s. It had a small haystack smokebox, inclined cylinders, a meager footplate for the driver, and big stack.
Grolier's short description of the Colburn illustration supplied further information: "Zerah Colburn was a gifted mechanical engineer who started his career in the industry as an apprentice in Lowell, Massachusetts. His work impressed his peers and he began writing and publishing technical works on steam locomotives in the 1850's and edited the America Rail Road Journal for a time. This drawing, from the early 1850's appears to be from his time at Baldwin Locomotive Works, but the design itself does not appear to have been built.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Don Juan |
| Locobase ID | 14038 |
| Railroad | |
| Country | USA |
| Whyte | 0-8-0 |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | |
| Year | |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 48,000 / 21,772 |
| Engine Weight (lbs / kg) | 48,000 / 21,772 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 20 / 10 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 20" / 457x508 |
| Tractive Effort (lbs / kg) | 13,114 / 5948.42 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.66 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 60 / 5.57 |
| Grate Area (sq ft / m2) | 11.13 / 1.03 |
| Evaporative Heating Surface (sq ft / m2) | 1042 / 96.80 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1042 / 96.80 |
| Evaporative Heating Surface/Cylinder Volume | 176.91 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1113 |
| Same as above plus superheater percentage | 1113 |
| Same as above but substitute firebox area for grate area | 6000 |
| Power L1 | 1595 |
| Power MT | 293.03 |