Brute Units?

[silverfoxcc]

Watching Terminus on Talking Pictures the other day.
As an aside there is a cracking 1935 film about a GWR driver called the Last Journey in a couple of days well worth watching.
Anyway the Brute

It was pulling a stack of trailers oyut of on of the platforms onto the copuncourse and had to do a left turn, All of the trolleys followed the 'tracks' of the unit.Now if i were to do that with a model, the trolleys would start to take the 'route of least resistance' ... ie start to straighten out.

So the question is How do they keep in line behind the power unit?

hope all that is clear

 

[Deepgreen]

Watching Terminus on Talking Pictures the other day.
As an aside there is a cracking 1935 film about a GWR driver called the Last Journey in a couple of days well worth watching.
Anyway the Brute

It was pulling a stack of trailers oyut of on of the platforms onto the copuncourse and had to do a left turn, All of the trolleys followed the 'tracks' of the unit.Now if i were to do that with a model, the trolleys would start to take the 'route of least resistance' ... ie start to straighten out.

So the question is How do they keep in line behind the power unit?

hope all that is clear

Effectively they are on castors (360 degree movement) and so each unit will follow the path of the one coupled ahead of it, to a small degree of variation.

 

[Parham Wood]

They also had a slightly curved front which I think also helped. I was always impressed at Birmingham New Street at night where very long trains of these used to make very tight turns on the platform to go down the subway at quite a speed too!

 

[RailAleFan]

https://en.wikipedia.org/wiki/Trackless_train

 

[silverfoxcc]

Thanks

Appreciated the input

 

[daikilo]

Effectively they are on castors (360 degree movement) and so each unit will follow the path of the one coupled ahead of it, to a small degree of variation.

I believe the castoring wheels were at the "front" end only, and had an almost inexistant tow-bar (just a triangle with a pin through a hole on an angle bracket on the rear frame of the BRUTE ahead of it).

 

[themiller]

Because the rear coupling moved outward as the front turned. The coupling point was fixed to the BRUTE but, because of the geometry, it kept the following trolley moving as before until it reached the same position as the leading one had been in before turning. Not the best explanation I've ever given but it's the same principle as the overswing of the rear of any vehicle which has its rear wheels in front of the extreme rear.