Sentinel (vehicle)
Sentinel is the commonly used name for steam-powered trucks from the 1920s, using the name of one of the manufacturing companies.
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They were manufactured by Sentinel Waggon Works Ltd., Shrewsbury, England and Richard Garrett & Sons , Leiston, Suffolk in Great Britain and on the European continent (under license from Sentinel) by Škoda in Plzeň . They were developed in the Sentinel Works in Glasgow , Scotland , but were never produced there.
They were characterized by their enormous robustness and low operating costs. Due to the great elasticity of the steam engine , they were also suitable for heavy-duty use in the field and on construction sites. The disadvantage was their short range: the fuel had to be refilled after 40 km, the water (at full power) after 25 km. A cold start took 30 minutes.
A lot of construction variants were built. Some copies were in service until the 1950s. The steam car of Garrett had similar parameters of the engine, however, was slightly smaller, but turned up to 800 min -1 and had a two-speed transmission.
Technical data of the most popular model
- Dead weight (fully fueled): about 8 tons
- Payload: 4–6 tons
- Engine: horizontal two-cylinder between the axles, bore 170 mm, stroke 230 mm
- Power: 70 hp at 250 min −1 and 19 bar steam pressure
- Top speed: 25 km / h
- Fuel: coal, coke, briquettes, charcoal, wood; there were also oil variants
- Tank volume: 300 kg coal, 800 liters of water
- Consumption: 4–5 kg of coal and 30 liters of water per km
- Range: 40 km at 15 km / h
- Power transmission: 2 link chains on the rear wheels
- Brakes: Two pairs of jaws in each of the rear wheels (one each for foot and hand operation). A fold-out "anchor" support was available for parking on the slope
- Tires: solid rubber, front D = 900/720 mm × 180 mm width, rear twin wheels D = 1050/850 mm × 180 mm width
Web links
- Images of Sentinel (English)
- Pictures of Garrett (English)