Data from the Twelfth Annual Report of the American Railway Master Mechanics' Association, May 13th-May 15th, 1879, page 83.
Mr Sedgley of the LS&MS described tests between seven wagon-top Eight-wheelers and seven straight-boilered Moguls from Baldwin (Locobase 9517). Although Sedgley made something of the slight difference between the two types, there was not much to choose when the taller drivers of the Eight-wheelers are taken into account.
NB: Boiler pressure is an estimate and the heating surface of the tubes (no firebox area is given) is measured from the inside in Sedgley's report; water side area would be 8-10% greater.
Locobase's identification of this locomotive's class is quite tentative, but the R class fits the meager amount of information supplied in Sedgley's report. Rhode Island works numbers for the R class were 452-455, 463-464 in January 1873, 465-466 in February, 580-584 in July, and 585-591 in August.
Another note: Every LS&MS locomotive of the period had a name. R-class name inspirations included Greek mythology, ancient history, and stars.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | R/Q-4 |
| Locobase ID | 9518 |
| Railroad | Lake Shore & Michigan Southern |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 20 |
| Road Numbers | 413-420, 431, 436-439, 451-457 |
| Gauge | 4' 9.2" |
| Number Built | 20 |
| Builder | Rhode Island |
| Year | 1873 |
| 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) | |
| Engine Weight (lbs / kg) | |
| 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) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 12,774 / 5794.20 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 155 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.08 / 3.38 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 15.80 / 1.47 |
| Evaporative Heating Surface (sq ft / m2) | 893 / 82.99 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 893 / 82.99 |
| Evaporative Heating Surface/Cylinder Volume | 141.52 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2054 |
| Same as above plus superheater percentage | 2054 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |