Museo virtuale Ferrovie Nord

The Class 200 steam locomotives were a batch of 7 units numbered 200-206 built by Belgian company Couillet in Marcinelle, a suburb of Charleroy, in 1883. The locomotives were ordered by the Società Anonima Ferrovia del Ticino for operation on the Saronno – Malnate and Grandate – Malnate sections. They were 2-coupled axles saturated steam tank locomotive (UIC wheel arrangement Bn2t) saturated steam tank locomotives with twin cylinder engine, Walschaerts valve gear, and flat slide valves. The 1,446 mm diameter of the wheels allowed a maximum speed of 60 km/h. 287 kW power.

The entire group of locomotives was added to the FNM rolling stock in 1888, following a contract between Ferrovie Nord and S. A. Ferrovie del Ticino for the operation of the latter’s lines. Three locomotives were withdrawn in the 1930s. In 1971 another two were withdrawn and scrapped, while another was preserved by Saronno-based Lazzaroni. The 200-05 remained in shunting service until 1973. Following careful restoration, it has been a historic FNM train since 28 September 1974.

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Technical description

Rodiggio: Bn2t
Ruote motrici: 1.446 mm
Costruttore: S.A. Couillet

Lunghezza fuori tutto: 7.806 mm
Larghezza: 2.600 mm
Corsa stantuffi: 600 mm

Diametro cilindri: 320 mm
Potenza oraria: 332 kW
Interasse: 2600 mm

Velocita massima: 60 Km/h
Pressione di esercizio: 11 Kg/cm²
Superficie riscaldamento tot.: 71,80 m²

Capacità casse acqua: m³ 3
Alimentazione carbone: m³ 1
Massa in servizio: t.28

Progettazione: 1883
Costruzione: 1883
Esercizio: 1883-presente

Wheel arrangement: Bn2t
Driving wheels: 1,446 mm
Builder: S.A. Couillet

Overall length: 7,806 mm
Width: 2,600 mm
Piston stroke: 600 mm

Cylinder diameter: 320 mm
1-hour power: 332 kW
Distance between axles: 2,600 mm

Maximum speed: 60 Km/h
Operating pressure: 11 Kg/cm²
Overall heating area: 71.80 m²

Water tank capacity: 3 m³
Coal supply: 1 m³
Service mass: 28 tons

Design date: 1883
Build date: 1883
Service date: 1883-present

Details

Driving cab

The driving cab houses the instruments for controlling the boiler steam pressure, the water level in the boiler, the brake compressed air and steam pressure gauges, and the injector valves and levers for supplying the boiler with water. The driver operates a control lever for the valve introducing steam into the cylinders, a reverser wheel, and the steam whistle control. As the 200-05 is a tank engine, the back of the driving cab houses a coal bunker with a capacity of around one cubic metre. There are water tanks on the side of the cab and along the boiler. As the locomotive is bidirectional, it can also travel in reverse with the funnel facing backward from the direction of travel. Although the cab, as it was in the 1800s, is only partially enclosed, the back of the cab features an oblong portlight to allow visibility in the rain.