Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 8, p. 108. See also , American Railroad Journal, Volume 34, No. 8 (28 February 1878), p. 227. Works number was 4362 in June 1878.
The J&B ran from the Junction with the Delaware Railroad (later the site of Harrington, Del), through Georgetown and Milford to arrive at Lewes, Del's breakwater (40 miles/64 km) and was completed in 1869. Nine years later, the railroad added a 4 1/2 mile branch line to the grounds of the Rehoboth Beach Association, a religious camp community. A year later, the line inched further into Rehoboth City(later Rehoboth Beach). This little Eight-wheeler was clearly meant to commemorate that event.
In its report, the ARJ noted that "[a]fter the completion of the extension the trip from Philadelphia to Rehoboth, by way of the Philadelphia, Wilmngton & Baltimore, the Delaware, and Junction & Breakwater roads, can be made without a change of cars."
Another branch line by the Breakwater and Frankford (owned by the J&B) ended 19 miles (31 km) away at Selbyville
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Rehoboth |
| Locobase ID | 16232 |
| Railroad | Junction & Breakwater |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 1 |
| Road Numbers | 5 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1878 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.33 / 2.13 |
| Engine Wheelbase (ft / m) | 20.96 / 6.58 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | / 6.58 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | / 22,680 |
| Engine Weight (lbs / kg) | / 32,659 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 2000 / 2.65 |
| 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) | 57 / 1372 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 24" / 356x610 |
| Tractive Effort (lbs / kg) | 9119 / 4136.31 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 117 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.99 / 3.32 |
| Firebox Area (sq ft / m2) | / 5.76 |
| Grate Area (sq ft / m2) | 12.80 / 1.09 |
| Evaporative Heating Surface (sq ft / m2) | 724 / 67.29 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 724 / 67.29 |
| Evaporative Heating Surface/Cylinder Volume | 169.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1664 |
| Same as above plus superheater percentage | 1664 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |