The Prussian T 10 Mainz Nos. 7401 to 7412 (later DRG 76-001 to 011) were 4-6-0 Ten Wheeler tank locomotives built to operate for the Königlich Preussische Eisenbahn-Verwaltung (K.P.E.V.), the Prussian state railways. They were procured for duties between Frankfurt and Wiesbaden.
Description[]
Mechanical Description[]
They were three cylinders simple-expansion locomotives, with a Heusinger valve gear. They shared many components with the Prussian P 6 and the Prussian P 8, such a the Prussian P 8 running gear.
The Prussian T 10 had a front steering bogie, with four wheels of a diameter of 1m (3.28.ft), and were fitted with the same six driving wheels as the Prussian P 8, with a diameter of 1.75m (5.74ft). A Crampton boiler with a grid of an area of 1.85m² (20ft²), produced enough heat to feed the boiler. They were fitted with the boiler of the Prussian P 6, It had 3 ferrules and was stamped at 12 bar (1.20 MPa; 174 psi). The boiler had to be positioned further forward than was usual on other locomotives in order to even out the distribution of weight, because the design omitted any trailing wheels. The steam intake dome was placed on horseback between the first and second ferrule, while the parallelepiped sand box was installed on the second ferrule. Two Prussian type safety valves were fitted on top of the boiler. The braking is done thanks to a Knorr compressor fitted on the right side of the engine. The feeding in water was done by two running injectors Friedmann-type. Plus of the whistle a steam bell was fitted on top of the smoke box, near the funnel.
No. 7404, when arriving in France would received some modifications. She would received: a new Nord-type smoke box door, with "Y" hinge and central button with the name of the company; Nord-type buffers; a luminous train identification panel, known as Cinema, on the left side of the buffer beam; and a Caille-Potonié-type water preheater, fitted on the right flank of the locomotive.
Coal and Water Cappacity[]
As these locomotives were tank engines, they were fitted with two sides tanks on each side. These tanks can contain a total of 7.5m3 (1,651 UK Gal; 1,981.2 US Gal) of water. A coal bunker is placed on the rear of the locomotive and can hold 3 metric tons (2.95 UK t; 3.3 US t) of coal.
Liveries[]
During their career, the Prussian T 10s would carry many liveries:
- Under K.P.E.V. ownership the locomotives were painted in olive green on the boiler, the cab and the cylinders. A reddish brown was applied on the chassis and the wheels. And black strips on the sode tank and the cab. The smoke bow was entirely painted in black, and the buffer beams were painted in red. Each locomotives received a brass numbering plate with the font painted in black, indicating the individual number of the engine, plus Its allocated region. These plates were put on each side of the tanks. Other plates in the same style were placed on each sides of the cab. There was a circular plate with the K.P.E.V. emblem, and another plate down indicating the class of the locomotives.
- Under DRG ownership the class 76 locomotives were painted with the early DRG livery, which was identical to the K.P.E.V. livery. In the late 1920s, they were painted in a black color all over on the smoke box, the boiler, the firebox, the cylinders and the cab, while the chassis and wheels were painted in a bright red. A number plate, with a black background and number in yellow, was fixef on the smoke box door, and two other identical were placed on each sides of the cab. Another plate, also with a black background and yellow lettering indicate the complete name of the railway, Deustche Reichsbahn Gesellschaft. The allocated region, and depots were painted in white on the coal bunker sides.
- Under DB ownership, the livery stay the same as under the DRG, however, the yellow inscription on the plates or directly painted on the locomotives were painted in white, and the Deustche Reichsbahn Gesellschaft was replaced by the one of the West German state railway, Deustche Bundesbahn.
- Under Nord ownership, No. 7404, now Nord 3.1499 then 3.887, received an unlined black livery, the number and name of the company and the number were painted in white on the tanks sides. the engine's individual number was also painted on the right side of the front buffer beam. The allocated depot's name was painted on the each side of the cab.
- Under SNCF ownership, the livery didn't changed more, nonetheless ever Nord inscription and numbers were removed. Instead the new SNCF number was painted on the two buffer beams, and on the two sides of the cab. The front Nord button on the smoke box door was replaced by the one of the SNCF, and the initials of the railway were painted on the cab sides.
History[]
In the early 1900, the KPEV needed a more powerfull tank engine then the Prussian T 11 class locomotives, to ensure passenger services on the Frankfurt to Wiesebaden, this 41-kilometre (25 mi) long route between the two termini was to be worked without turning the locomotive. Because the engine tended to derail, in practice it was turned whenever possible. The first trial runs took place on 30 June 1909.
Germany[]
K.P.E.V. Class T 20 Mainz Nos. 7401 to 7412[]
DRG, then DB 76-001 to 76-011[]
The Reichsbahn took over 11 machines of this class as their DRG Class 76, the engines were given numbers 76 001–011. Eight engines were taken over by the Deutsche Bundesbahn. Between 1945 and 1948 they were either retired or sold to private railways. In 1964 there were still six units on duty with the East Hanoverian Railway (Osthannoversche Eisenbahnen; OHE). None of the 11 examples of the DRG Class 76 have been preserved, all of them were cut up for scrap.
France[]
Nord No. 3.1499 then 3.887[]
After WWI, No. 7404 was given to the Chemins de fer du Nord under the terms of the Versailles Treaty.
SNCF 2-230.TB.1[]
See also[]
- Prussian state railways
- List of Prussian locomotives and railcars