Prussian T 11

Updated: August 2026 – A leading bogie at the front, three coupled driving axles, side water tanks and no separate tender: the Prussian T 11 is a classic suburban locomotive. This page explains how the Prussian classification system works, why the Reichsbahn turned it into Class 74, and how to tell the class apart from its close relative, the T 12.

What is the Prussian T 11?

The Prussian T 11 is a tank locomotive with the 2’C wheel arrangement for suburban and local services, built for the Prussian State Railways and fitted with a saturated-steam boiler. A two-axle bogie runs at the front, with three coupled driving axles working behind it.

After the vehicle fleet was standardised, the Deutsche Reichsbahn-Gesellschaft classified this class as Class 74 – together with the technically more advanced Prussian T 12, which had a superheater. Both classes shaped local services around major cities for decades, especially in the Berlin area. Surviving examples from this era stand today in collections such as the Deutsches Technikmuseum Berlin, which displays its vehicles across two roundhouses.

Two naming systems, one vehicle

With Länderbahn vehicles, you always come across two designations: the original class and the later Reichsbahn class. Together, the two give you the full picture.

Designation	System	What it tells you
T 11	Prussian classification system	T = tank locomotive, number = sequential class number
Class 74	DRG scheme from 1925	Block 60–79 = tank locomotive for passenger trains
2’C wheel arrangement	International notation	Leading bogie plus three coupled driving axles
Saturated steam	Boiler type	No superheater – the distinguishing feature from the T 12

The Prussian system uses letters for the intended use: S for express, P for passenger and G for freight locomotives with a separate tender, and T for tank locomotives. Well-known examples are the Prussian P 8, which became Reichsbahn Class 38, or the larger T classes, from which, among others, Class 78 emerged.

The 1925 DRG scheme, by contrast, is strictly ordered by purpose and type: 01–19 express locomotives, 20–39 passenger locomotives, 40–59 freight locomotives, 60–79 tank locomotives for passenger trains, 80–96 tank locomotives for freight and shunting duty, 97 rack railways, 98 local railways, 99 narrow gauge. Anyone who can read both systems can classify almost any German steam locomotive – the guide to identifying classes shows the sequence for doing so.

How to recognise the type

Why suburban locomotives were built this way

Suburban service means: short distances between stops, frequent starts, tight turnaround times and terminus stations with no way to turn around. This design is tailored exactly to that.

• Tank design, so the locomotive can run in both directions without turning.
• Three coupled axles for enough tractive effort with constant starting.
• Leading bogie at the front for a smooth ride at higher speed than shunting duty requires.
• Limited supplies, because diagrams were short and refuelling points were close by.

This design made the class the backbone of urban local services before electric multiple units took over the job. It also explains why such engines rarely look spectacular: they were workhorses for everyday traffic. Whether a surviving example is still steamed at all depends on boiler inspection deadlines and on works such as the Meiningen Steam Locomotive Works, which carries out the major overhauls.

The Prussian classification system at a glance

Prussia had by far the largest vehicle fleet of all the German state railways – its naming system remains influential to this day accordingly. It works with a letter for the intended use and a sequential number for the class.

Code	Meaning	Typical field of use
S	Express locomotive with separate tender	Long-distance service on main lines
P	Passenger locomotive with separate tender	Passenger trains on main and branch lines
G	Freight locomotive with separate tender	Freight traffic, often with many coupled axles
T	Tank locomotive without a separate tender	Suburban service, branch lines, shunting duty

Within the T classes, the spectrum ranges from small three-axle shunting engines to large passenger tank locomotives with several leading axles. The T 11 sits in the middle: big enough for brisk suburban service, but far from the heavy branch-line and mountain-grade engines.

What’s notable is how well the two systems translate into one another. The Prussian class describes use and type, and the Reichsbahn scheme orders by the same principle – just with numbers instead of letters. That’s why Prussian T classes reliably land in the number blocks 60–96, meaning among the tank locomotives, and never among the express classes. Once you understand this link, you can roughly predict the later class for almost any Länderbahn vehicle in a museum.

Where you’ll find vehicles of this generation today

Not in scheduled service at all any more. Surviving Länderbahn locomotives stand in railway museums, with heritage societies and occasionally as a monument. Research therefore runs via dates and holdings:

• Check museum holdings: which vehicles does a museum have at all, and in what condition?
• Wait for events: museum festivals and seasonal dates also bring rarely shown vehicles into the light. The guide to heritage railways and special trains shows the ways to research this.
• Document the condition too: operational, on display, under restoration – for historic vehicles, that’s the real information.

Photographically, Länderbahn engines benefit from a side view: only there do you see the wheel arrangement, water tanks and motion fully. The further basics are in the guide photographing steam trains.

Common mix-ups

Verdict

The Prussian T 11 shows how closely design and operating role are linked: suburban service demands an engine that runs in both directions, starts often and still moves briskly – which produces a tank locomotive with the 2’C wheel arrangement. The Reichsbahn accordingly classified it as Class 74. You can only see such vehicles in museums today, and there it pays to look closely at the boiler, wheel arrangement and markings.