Jelly trains

[Dave4468]

Here is an odd one. As a test for a scenario I've been playing with the Thomson 171 and coupling it to itself and to the the RSC 377s. When the 171 starts as a pair (4+2) it behaves as it should but as soon as it couples to something else the laws of physics collapse. It both examples I've has the 4+2 run into an occupied platform and couple to either another 171 or a 377. As soon as they couple the "original" trains starts stretching.

The leading unit continues to behave as normal but from then the coupler between the first and second unit is stretched out as are all couplers beyond. Under acceleration the gaps get bigger and under braking they actually come together and merge but TS doesn't detect a collision.

Is it a known issue and is there a fix?

[deltic009]

I found a similar problem when I made a Quick Drive of two Network Rail test trains joined at the centre DBSO to DBSO, couldn't find a solution though.

[749006]

I might be wrong but can you couple a DMU to an EMU?

[k3v1n989a813]

I might be wrong but can you couple a DMU to an EMU?

I think so, the 171 has the same coupling system as the 377.

[deltic009]

I might be wrong but can you couple a DMU to an EMU?

I think so, the 171 has the same coupling system as the 377.

Physically coupling and coupling in a way that both units take power, operate brakes etc etc are two very different things.