A sky race

Really run a sky race (you seem to eat it) in the state that brakes do not act on between before working after operating brakes to let a driver reduces the speed of a vehicle or stop. Distance to run at the time of a sky race is called sky race distance.

Table of contents

Car

In the case of a car, the sky race distance refers to distance before brakes beginning to work after a driver recognized danger [¹]. In other words, both distance to advance to before brakes begin to work after operating distance and the brakes which advance before I operate brakes after a driver recognized the need of the stop are included.

In contrast, distance to advance before I stop after brakes began to work is called braking distance. I say distance to go ahead between before a car stopping with a stopping distance after distance namely the driver who let you add sky race distance and braking distance recognized the need of the stop.

The correction of this knob is expected.

Railroad carriage

In the case of a railroad carriage, I point to the distance to advance before brakes begin to work after operating brakes with the sky race distance unlike a car [²]. In addition, that is between it at the time of a sky race in time before brakes beginning to work after operating brakes; [³].

A minute is long, and the train needs around several seconds at the time of a sky race to need by action from brakes operation in comparison with a car from 0.5 seconds (it varies according to a car model, a formation dual number). A share tends to grow big at the time of a sky race by freight trains using an automatic air brake.

As for the sky race distance, the speed of the reply is found on brakes to grow big in proportion to speed.

An air brake and the problems

In the train (railroad carriage), an air brake has been used for a long time. The operation or remitting one is basic with brakes by this operating the brakes valve in the driver's seat by adjusting the pressure of no air pipe (brake pipe) which it goes down between vehicles and let go through.

A method to depend only on the pressure of the air pipe for the control of such brakes includes direct brakes and an automatic air brake. The former operates direct brakes by compressed air, and the latter triggers brakes by letting a high-pressure brake pipe decrease pressure. However, when the formation of the train got longer by these methods, a conjugation of the pressure did not reach the whole train instantly, and it became the problem that a reply was late.

Therefore the electromagnetic automatic air brake which controlled the brakes pressure and electromagnetic direct communication brakes were developed by the electromagnetic address that I arranged on each vehicle in conjunction with brakes valve operation to raise the responsiveness of brakes. Because the electromagnetic address reaches each vehicle by an electrical signal instantly, high responsiveness is provided. The latter had high responsiveness and was used many as brakes of the trains among other things until about 1980. I eliminate an air pressure order by the brakes valve operation after the 1980s, and electric order expression brakes to control only by an electrical signal become mainstream and it is adopted to not only the train but also the new diesel train and realizes higher brakes responsiveness.

Footnote

1. ^ Defense driving vol.2 (PDF) - Ehime Police headquarters traffic Planning Division
2. ^ sky race distance - railway technology glossary of terms, Railway Technical Res. Inst.
3. ^ sky travel time interval - railway technology glossary of terms, Railway Technical Res. Inst.

This item is an unfinished item in conjunction with the cars. I demand the cooperator who corrects it, and corrects this item (car portal / car PJ/ car PJ).

This item is an unfinished item in conjunction with the railroads. I demand the cooperator who corrects it, and corrects this item (P: railroad /PJ railroad).

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This article is taken from the Japanese Wikipedia A sky race

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