The reference for locomotives and railcars
Prussian T 16 Erfurt No. 1980
Germany | 1904 | only one produced
Die Lokomotive, July 1904

In order to improve the operation of steam locomotives on winding mountain routes, the T 16 with the number “Erfurt 1980” was developed for trial use on the mountain routes in the Thuringian Forest. Its distinctive feature was a second cab at the front to improve visibility of the track. It was not mass-produced and should therefore not be confused with the later freight locomotive T 16 with 0-10-0T axle arrangement.

A symmetrical chassis with the wheel arrangement 4-6-4T and 1,750 mm large driving wheels was used as a basis to enable a speed of 90 km/h in both directions. The requirements stipulated that these locomotives should be able to pull 200-tonne trains at top speed on level ground and up one percent steep gradients at 75 km/h or 47 mph. As with the two S 9 trial locomotives that were built at the same time, a third man was deployed in the front cab because the fireman was unable to operate the engine on his own. There was a voice connection between the cabs in order to be able to give the appropriate instructions based on the observations on the route. In contrast to the S 9, the front was not tapered due to the lower speeds.

With its extremely generously dimensioned grate area and the equally large evaporative heating surface, the locomotive was able to achieve a high level of continuous output. However, the complex operation with the two cabs was not convincing and therefore there was only one example, which was only used sporadically. A real successor was the T 18 from 1912 with the same wheel arrangement, which was conventionally equipped with only one cab and was still able to provide sufficient performance with a simple engine.

Axle config4-6-4T (Hudson) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length58 ft 0 7/8 in
Wheelbase44 ft 11 3/8 in
Fixed wheelbase13 ft 1 1/2 in
Empty weight171,299 lbs
Service weight234,792 lbs
Adhesive weight105,822 lbs
Axle load35,274 lbs
Water capacity3,434 us gal
Fuel capacity8,818 lbs (coal)
Power sourcesteam
Estimated power1,475 hp (1,100 kW)
Optimal speed40 mph
Top speed56 mph
Starting effort23,527 lbf
with start valve28,232 lbf
Power Plant
Driver diameter68.9 in
Boiler pressure203 psi
Expansion typecompound
Cylindersfour, HP: 16 9/16 x 24 13/16 in
and LP: 24 13/16 x 24 13/16 in
Grate area44.1 sq ft
Evaporative heating area2,055.9 sq ft
Superheater area473.6 sq ft
Total heating area2,529.5 sq ft
Calculated Values
steam locomotive
tank locomotive
cab forward
last changed: 03/2022

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