Military Light Railways 0-6-0 Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class K33.10/Fiffi (Locobase 3791)
Data from [
] . [] says that the Pfiffi and Fiffi (known as the "Whistlers") were trial engines to compare superheated (Pfiffi) and saturated (Fiffi) designs.
Fiffi (works number 12880) was first put operated on the Nassau Light Railway and was acquired by the Nordhausen-Wernigerode Eisenbahn in 1920. After World War II, Fiffi served in the Selketal railway area. Following reunion, she joined several other loks on the HSB stud.
Class K33.10/Pfiffi (Locobase 3790)
Data from [] . [] says that the Pfiffi and Fiffi (aka the "Whistlers") were trial engines to compare superheated (Pfiffi) and saturated (Fiffi) designs. Pfiffi's tanks were shorter than those of Fiffi.
The Nordhausen-Wernigerode Railway (NWE) purchased the locomotive (Henschel factory number 12879) from the military. After World War II, Pfiffi served in the Selketal railway area. Following reunion, she joined several other loks on the HSB stud.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | K33.10/Fiffi | K33.10/Pfiffi |
| Locobase ID | 3791 | 3790 |
| Railroad | Military Light Railways | Military Light Railways |
| Country | Germany | Germany |
| Whyte | 0-6-0T | 0-6-0T |
| Number in Class | 1 | 1 |
| Road Numbers | 99.61 | 99.61 |
| Gauge | Metre | Metre |
| Number Built | 1 | 1 |
| Builder | Henschel & Sohn | Henschel & Sohn |
| Year | 1915 | 1915 |
| Valve Gear | Heusinger | Heusinger |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 8.20 / 2.50 | 8.20 / 2.50 |
| Engine Wheelbase (ft / m) | 8.20 / 2.50 | 8.20 / 2.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 25.37 / 7.73 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 24,255 / 11,002 | 23,589 / 10,700 |
| Weight on Drivers (lbs / kg) | 66,812 / 30,305 | 66,812 / 30,305 |
| Engine Weight (lbs / kg) | 66,812 / 30,305 | 66,812 / 30,305 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 1056 / 4 | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.20 / 1 | 1.20 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 | 37 / 18.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 31.50 / 800 | 31.50 / 800 |
| Boiler Pressure (psi / kPa) | 203.10 / 1400 | 203.10 / 1400 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.75" x 15.75" / 400x400 | 16.9" x 15.75" / 430x400 |
| Tractive Effort (lbs / kg) | 21,412 / 9712.33 | 24,653 / 11182.43 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.12 | 2.71 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 173 - 1.85" / 47 | 88 - 1.85" / 47 |
| Flues (number - dia) (in / mm) | 18 - 4.92" / 125 | |
| Flue/Tube length (ft / m) | 8.53 / 2.60 | |
| Firebox Area (sq ft / m2) | 54.77 / 5.09 | 51.22 / 4.76 |
| Grate Area (sq ft / m2) | 16.14 / 1.50 | 15.06 / 1.40 |
| Evaporative Heating Surface (sq ft / m2) | 749 / 69.61 | 553 / 51.40 |
| Superheating Surface (sq ft / m2) | 201 / 18.70 | |
| Combined Heating Surface (sq ft / m2) | 749 / 69.61 | 754 / 70.10 |
| Evaporative Heating Surface/Cylinder Volume | 210.89 | 135.24 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3278 | 3059 |
| Same as above plus superheater percentage | 3278 | 3885 |
| Same as above but substitute firebox area for grate area | 11,124 | 13,212 |
| Power L1 | 3071 | 6827 |
| Power MT | 304.00 | 675.82 |