Why does a locomotive not require steering?

Yes you are right, trains don't need a steering wheel. The are able to turn without a steering wheel because of the camber and turn of a railway track. The wheel profile helps to turn without skidding and works as a pseudo differential. The 'steering wheel' that you see in the picture is actually a throttle.



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Engines may be left idling to maintain important safety related functions such as maintaining engine temperature, air pressure for the brake system, the integrity of the starting systems, the electrical system and providing heating or cooling to a train's crew and/or passengers.

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A train engine requires about a hundred litres of fuel to get it started. So it wouldn't be economical if the engine is stopped and started frequently. This apart, if the engine is stopped, the moving parts' lubrication will also come to a halt.

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Yes, diesel engines are always running in case you didn't know! We don't see any other type of train doing this, but only diesel locomotives leave their engine running always. In case you haven't noticed, diesel trains are never turned off. They are always left running.

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To help the wheels stay on the track their shape is usually slightly conical. This means that the inside of the wheel has a larger circumference than the outside of the wheel. (They also have a flange, or raised edge, on the inner side to prevent the train from falling off the tracks.)

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To help the wheels stay on the track their shape is usually slightly conical. This means that the inside of the wheel has a larger circumference than the outside of the wheel. (They also have a flange, or raised edge, on the inner side to prevent the train from falling off the tracks.)

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Unsourced material may be challenged and removed. Many passenger trains (usually medium and long-distance) have toilet facilities, often at the ends of carriages.

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Unlike a steam locomotive, diesels could also operate “back-to-back” with a cab facing in either direction. With an MU-equipped cab unit (or “A Unit”) on each end, yard crews did not need to turn them, saving the railroad time and money.

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Trains cannot collide with each other if they are not permitted to occupy the same section of track at the same time, so railway lines are divided into sections known as blocks. In normal circumstances, only one train is permitted in each block at a time. This principle forms the basis of most railway safety systems.

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To minimise this rail spreading effect rails are often laid so they are tilted (inclined) slightly inward towards the centre of the track. This equalises the load through the fasteners and avoids the rails being spread apart in use.

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Because rails are made from steel, they expand as they get hotter, and can start to curve this is known as 'buckling'. Most of the network can operate when track temperatures heat up to 46°C – roughly equivalent to air temperature of around 30°C – but rails have been recorded at temperatures as high as 51°C.

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What happens if you stand too close to a train? Air between person and the train moves with high velocity due to dragging effect and the air behind person is approximately still.

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It is not easy to derail a train by force or collision, but derailments are the most common type of train accident.

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The life expectancy of diesel-electric and electric locomotives is expected to be similar—about 25 years. Both types of motive power are subject to technological obsolescence.

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A sandbox is a container on most locomotives, multiple units and trams that holds sand, which is dropped on the rail in front of the driving wheels in wet and slippery conditions and on steep grades to improve traction.

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The life expectancy of diesel-electric and electric locomotives is expected to be similar—about 25 years. Both types of motive power are subject to technological obsolescence.

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