Testing the brakes of a new railway car (2)

This is the "cabin view" of a new type of brake being tested on a test track.

The blue cargo car is fully loaded at 90 tonnes, and the test speed is 100km/h. The engineer releases the couple, and the blue car starts braking. All the measurement equipment is on the blue car, and it measures speed, distance, deceleration and braking pressure in the brake cylinder.

Sorry for the quality, there was no way to shoot it without the sun against the camera.

See part 1 for more.


Here's a satellite pic of the loop: http://www.zumi.pl/namapie.html?qt=%BFmigr%F3d&Submit=Szukaj&long=16....

Category:

Education

Tags:

• railway
• breaks
• train
• engineering
• Instytut
• Pojazdów
• Szynowych
• Tabor

[ted3959]

i think the language is polish

[Modeltrainguy]

Interesting! VERY Interesting! 5 Stars!

[LMB222]

Thanks for the info, and the name of the place, I will look for it.

I'm not sure if I know how brakes on autocouple systems work, but here the brake hoses are not connected to the loco for obvious reasons.

[tomankt]

And for me, this language is not understandable in general, but it's just enough close to understand numbers as 10, 60, 80 - they sound very similar to Russian 10, 60 and 80 :)

Moreover, all the procedure looks similarly to that in russian brake tests in Shcherbinka. Except the difference in decoupling technique due to autocouple (short loco' brake application to let them decouple, then a bit of traction to go away, and only then usual brake hose couplers decouple - as they do on humps).

[dashloc]

Ok, thank you for the details, it's sometimes hard to understand what peoples talking another language say :)

[LMB222]

Right, I was going to go on on the simplicity. It dates to 1960's and early 70's., and since "better is the enemy of good", it still uses much of the technology of the time. Simply because it works.

What you hear in the video is the engineer telling the loco engineer how far the cargo car is(5..10...20m etc), over a microphone and a cable.

Damn primitive, but it works.

[dashloc]

Effectively, that's more simple than i had thinking about ! Thanks for the answer :)

[LMB222]

No, the blue box holds the registering electronics + a laptop that doubles the measurement with an accelerometer.

The brake is open at the very beginning of the video by an extremely simple method: there's a common house-type socket on the passenger car, and a cable with a plug (230V type), on the cargo wagon side. When the operator wants to decouple, he short-circuits the socket, the controller on the cargo wagon releases the air thus making an emergency braking, and the rest is video.

[dashloc]

If i'm right the air conduct is isolated in the car, on the part 1 we can see a blue box certainly used for command the opening of the general air conduct of the car, if this one is full open to the atmosphere the brake goes in emergency braking, that's how you can test the brake !

[LMB222]

It does apply the full force of the brake. In part 1 you can see smoke coming from the pads. It's 90 tonnes at 100km/h.

As for the construction of the brake, I am not sure how it works now. Always though it is as you wrote it, but was told it is more complicated. I would read an appropriate article on Wikipedia.