How the LGB 4058 works ?

[ARIA31]

I am interested to know what is the purpose of the hardware installed in front and the rear of the prototype version of the LGB wagon ref.4058
I suspect this is additionnal braking capability.
However somebody can explain me how it works on a real wagon ?
Why a so big reservoir ? How it is filled ? What are these 2 drums for ?

Thank you in advance

 

[TonyMP52]

The 4058 wagon is modelled on one equipped with vacuum brakes. The two drums each end are the vacuum brake cylinders which, on a real wagon, would apply brake blocks to the wheels via levers and rodding. The reservoirs are used to store vacuum. In real operation a locomotive coupled to the wagon would at first create a vacuum by evacuating atmospheric air pressure in the train pipe connecting all vehicles in the train. The reservoirs on the wagon are connected to the train pipe so they would too have a vacuum created in them. In this condition there is vacuum both underneath and above the pistons in the brake cylinders. As the pressure is balanced each side of the piston gravity causes the piston to drop and thus the brakes are released. When the Driver applies the brakes he allows atmospheric air into the train pipe. On the wagon a valve closes disconnecting the train pipe and the vacuum reservoir so preventing the train pipe allowing atmospheric air pressure into the reservoir. There is therefore now a pressure imbalance in the system and so the piston rises in the brake cylinder because there is less pressure above it than below it. In so doing it applies brake blocks to the wheels.

 

[ARIA31]

Thank you so much Tony.

Trains braking system is now more understandable for me.

I am currently creating a "kind" of schnabel car as you can see on this thread.

3D power transformer printing and associated transport wagon

Hello all, The story started with this picture made by a G scale railroader "Vibrocop" on another french forum dedicated to US trains. I was willing to have such a transfo on my indoor railroad. This transfo is quite big : 250 x 172 x 100 I have a good friend Joël living close to my home...

www.gscalecentral.net

At first I was thinking the hardware that we can see on the prototype version of such schnabel car was an hydraulic system used to drive lifting actuators.
Until I noticed the very big reservoir size, leading me it can be braking system or something else.