Atomic Systems

Hi

55009 in trouble

http://www.youtube.com/watch?v=y9VENJeoUK0

D1015 in trouble

http://www.youtube.com/watch?v=r7gjYXQQN_k

Drivers these days...

Might be this monkey driving

http://www.youtube.com/watch?v=0bDuS_lI ... re=related

Cheers
Jon

Surely thats bad for the wheels to keep it sliping for that long

It does alot worse for the rails.

Why have I got a sense of deja vu about this thread ?

Whats so bad about the 3rd video?

The fact that by repeatley going to full so quickly - it can damage the engine. The fact that he was hiding the speedometer from the conductor driver - behavior like that that nearly got a preserved railway closed.

I think it's probably more the case that there's a 25 mph speed limit on preserved railways - not ideal for thrashing Wizzo's...

Ash

There seems to be a lot of backseat drivers about so here's my 2p worth.
In the case of the second video the Western was running on the rear engine only so only the rear bogie was providing traction. With the driver in the front cab it is very difficult for him to know that the loco is slipping as he wouldn't have been able to hear much rail or engine noise. Add the fact that the loco has only half its normal power available and the situation in the video could easily happen to the most experienced of drivers.

In the 3rd video you'll notice the driver doesn't go straight from off to on and actually lets the revs build up and gets the turbo spinning before going for full power. The video has been cut as well so it looks he was doing it repeatedly. There's no excuse for speeding though and the ELR has been in trouble for this in the past.

Tim

Rfairlie wrote:....In the case of the second video the Western was running on the rear engine only so only the rear bogie was providing traction. With the driver in the front cab it is very difficult for him to know that the loco is slipping as he wouldn't have been able to hear much rail or engine noise. Add the fact that the loco has only half its normal power available and the situation in the video could easily happen to the most experienced of drivers.....

So the fact he's had the power on for over 30 seconds after the initial slight forward movement and hasn't moved forward again for that length of time, in fact has rolled back slightly, doesn't give him a clue that all might not be well in the adhesion department?

Andy L

Maybe the driver in the second video was trying what he thinks is best to remove the word 'IDIOT' painted on the rail.

Added to the fact that westerns have a nice bright wheelslip light

Shed driver.... probably though that meant the computer was taking over and doing the 'work' for him.

and yes.... it was the obviously speeding in the third video that interested me...... doing it is one thing.... allowing it to be filmed is foolish... allowing it to be hosted on Youtube....... asking for trouble.

Cheers
Jon

phill70 wrote:Added to the fact that westerns have a nice bright wheelslip light

Anyone know how wheelslip is detected in a diesel hydraulic where all the axles driven by the same engine are mechanically linked and must therefore rotate at the same speed? Is it by comparing axle speeds between bogies?

I think that in diesel electrics of the same vintage the detection was achieved by comparing the current being drawn by each traction motor and if a motor was drawing less current it triggered the wheelslip warning light, on the assumption that it must be turning faster than the rest due to slip.

Andy L

Andy
I have no idea whatsoever But I can find out

However, the main cause of the wheelslip, is too much power, watch it again, he applies power, the train moves, so he then goes for too much power, then it slips.
Just bad driving.

Now people just might realise what I mean about not using too much power on starting, and that full power starts just don't happen.

Westerns, were at there best in the later days, on heavy stone trains.

phill70 wrote:I have no idea whatsoever But I can find out

Thanks Glyn, I'd be interested to know if you can as I've not seen it mentioned in any of the books I've got.

phill70 wrote:Westerns, were at there best in the later days, on heavy stone trains.

I think they were preferred for the Merehead stone traffic because they had a higher starting and continuous tractive effort than a 47 and they were less prone to slipping than a diesel electric - driven properly of course!

Andy L