Engineering Train used on London Underground infrastructure
About this creation
As a Technical Officer for London Underground I have had to work with engineering trains quite often.
They are very unique looking and Ive always fancied making a Lego one.
London Underground engineering trains are very different to main line locos as they have to be quite small to enable it to operate in tunnels.
This particular type runs on normal traction current during traffic hours and switches to battery power in engineering hours and possessions.
In making a Lego one I had certain obstacles to overcome.
The standard PF train motor was too large to use which is also the case for the 9V and 12V type.
I opted to use one PF M motor but, because of limited space, the battery box and PF sensor had to be housed separately in another loco. So I have the motor loco L25 and battery loco L10.
With this arrangement the PF M motor struggled. The battery loco weighed quite a lot and combined with the wagon there was just too much weight for 1 PF M motor to pull. I could have geared it down for more traction but this would have affected the speed quite significantly.
I decided to squeeze a second PF M motor in L25 and it works very well. Plenty of traction and no loss in speed.
Here we have the bogies on loco L25. All wheels on this loco drive.
Here is loco L10, which houses the battery box and PF sensor.
The roof is easily removed to allow access to the battery box.
Because of the size of the battery box, it is mounted quite low and is held in the loco by a cradle. This all protrudes through the bottom of the loco chassis but has plenty of clearance from the top of the rails.
London Underground general purpose wagon. It's basically a flat bed wagon that can be altered for different uses.
Here we have 2 busy track workers.
With the lovely sunshine I don't think the work light is really needed.
Of course these guys would usually be working at night.
Another problem was routing the cables through the wagon.
If this was a box/container wagon then things would be relatively straight forward.
I managed to overcome this problem by putting a blue diesel generator on the wagon to hide the connectors and ballast to hide most of the cabling.
This is one of the bogies on the wagon.
Another problem I had was end throw of the loco and the wagon. When on a curve the coupling would either disengage or cause the wagon to twist and derail. To overcome this the coupling on the wagon is double hinged.
You may have noticed that the loco has 2 ways of coupling.
There is a hook in between the buffers and a much lower coupling (which I've utilised to connect the train together).
In real life the hook type coupling is used to hitch up to wagons and the low coupling is used to hitch up to a tube train (usually to tow a broken down one).
Fantastic!! it looks very realistic, yet classic too! It's functional too, so it's a win-win situation! p.s. Are you from Britain? If so, could you join this group? - http://www.mocpages.com/group.php/22889
Quoting David Roberts
Sorry, couldn't resist this. You say that it runs on battery power during possessions. Do you use an exorcist to get rid of the demonic influence? :)
Ha ha! I think with the current strike most of the public would say the demonic influence is Bob Crow. I should explain that a possession is a section of railway that is taken out of service usually for engineering works. These happen usually on weekends for track relaying or other major engineering works. 3 words that sends a chill down any travellers spine...Rail Replacement Service!
This is really fantastic, I've always wanted to see you build some of the special stuff from the underground, I always wonder about whats going on to keep the trains moving. Its also really nice to see mini figure scale stuff thats properly wired up like this, for me its always impossible to do it because i've used up all the space. Oh and those Side windscreens, amazing idea! captures the look of a tube screen perfectly.
It looks really good. 7 wide! I guess it“s been a great challenge to make room for motors, battery and drive shafts, but you've done a fine job. I like the use of windscreenelements in the cab. I found pictures of such a train on google, and as I see it, it looks like the real thing, except for one thing, the roof curves on the real one.
Really a quite cool train, looks very accurate. Very nice work on transferring the power throughout the train and keeping the various parts of it relatively small. Great work on the details too, the front end is well done and that work light is a neat idea. While the build does stand perfectly well on it's own, i too would have liked to see a reference photo :-)
it s cool to see you make trains, since you really work with them, brilliant problem solving, it looks fab! maybe adding a pic of the real one for comparison would be nice, for those of us who have no idea of what they look like.