Although most people, for objective reasons, do not have the slightest idea about what exactly the diesel locomotives shown in the photo are called, each At the same time, such a feature of tractors as a strange cabin with beveled windows made against all the laws of aerodynamics was probably striking. What is it: a specific design solution or a purely utilitarian structural element?
Soviet diesel locomotives from the 2TE10 and 2TE116 series one way or another (at least in the movies) should have been seen by the majority of our compatriots. As already noted, all of the listed compounds have one extremely specific feature - beveled windshields. Everyone pays attention to them when looking at the mentioned diesel locomotives, even if they do not attach much importance to it.
They just "hurt the eye" against the background of other tractors, which are made taking into account the laws of aerodynamics. It is quite obvious that such a shape of the locomotive's cabin, albeit insignificantly, but still worsens its aerodynamic performance. At the same time, the speed decreases and the fuel consumption increases.
In fact, aerodynamics matters very little for trains traveling at speeds of up to 100 km / h. On duty, Soviet diesel locomotives rarely accelerate to at least 80 km / h. At such speed indicators, even a complete violation of the laws of aerodynamics does not give any critical values in the area of falling speed and increasing energy consumption. At the same time, cabins with a negative angle (this is what they are called) are not used for the sake of beauty.
The locomotive cabins have a very large glazing area. This is necessary in order for the driver to have the most complete view in front of him and around him. At the same time, glazing of a large area has a huge disadvantage, especially in relation to vehicles: through it receives a huge amount of sunlight, which can be a problem for the driver or driver clear in the afternoon. In order that the person at the control panel is not dazzled, the cabin glazing with a negative angle is used.
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The fact is that such glasses refract light rays in a completely different way, as a result of which they do not fall in blinding glare on a person's face. This technology is used not only in trains. Negative glazing is widely used in the construction of control towers at airports, as well as in the construction of captain's bridges on ships.
If you want to know even more interesting things, then you should read about rail extreme: mesmerizing routes that will be remembered for a long time.
A source: https://novate.ru/blogs/150421/58602/
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