Atomic Systems

Is working wheel slip consistent for anyone? There are situations where I would think wheel would be very likely, yet I can seem to nail the throttle to 100% and get no wheel slip regardless even if I have 300 cars tacked on the locomotive. Then out of no where it seems that I will get wheel slip in a unlikely scenario, like a class 37 and a normal rake of mk2s.

styckx wrote:Is working wheel slip consistent for anyone?....

Not for me. For example I set up a train on the TestTrak consisting of a Class 66 and about 1000 tons on the drawbar and accelerated. Wheel slip occurred but with care I was able to get the train above a speed at which full power could be applied without slip. I then stopped the train and on re-starting found I could apply full power from a stand without any slip at all. The weather was set to clear so rain shouldn't have affected adhesion and as far as I know there's no way of setting track properties to have adhesion vary with location. The results could be repeated at will.

Comparisons using different locos are not reliable because the parameters that control adhesion might, rightly or wrongly, be set up differently.

Andy L

While messing around with a 9F and 1000 tons on the Transpennine route I noticed that on curves of any curviture, the loco slipt like mad, but on straights it was all fine, it is very annoying :bad-words:
Regards
Edward

Well to be fair to the loco, friction & drag does increase on a curve - and if it is a long wheelbase coupled loco, some of the wheels will have to slip on one side or the other to get round the corner as the distance travelled is different for each side

Perhaps gradient is a factor. Any train is less likely to slip going downhill. The weight of a locomotive is most evenly distributed when on the flat - otherwise more weight can be on one bogie, and the other one will lose adhesion.

It also depends on train types. It does not sound like the original comparison was between the same two trains unfortunately.

However, my experiences would suggest that wheelslip is relatively consistent within Railworks models.

AN

I know it's not eactly on topic, but I'm currently looking into making locos wheelslip, like the Black 5, 8F, 7F, Tornado, locos that dont wheelslip really. As soon as I work it out, i'll have to let you all know. I've been badgering away quietly, but I am not getting hugely far at the moment..

Doesn't the JT class 60 model this? I can get wheel slip every time I max the throttle from standstill.

firetrap1 wrote:Doesn't the JT class 60 model this? I can get wheel slip every time I max the throttle from standstill.

The IHH 56 does also, and from the couple of drives I've given it the RSC 31 seems to as well

Will wrote:I know it's not eactly on topic, but I'm currently looking into making locos wheelslip, like the Black 5, 8F, 7F, Tornado, locos that dont wheelslip really. As soon as I work it out, i'll have to let you all know. I've been badgering away quietly, but I am not getting hugely far at the moment..

The sounds as per the 9F? or just the visual effect of the correct wheels? if the latter it's the blueprint bogie, you have to set the front bogie to unpowered. Pretty annoying RSC didn't update the locos as it doesn't take long to do, and the slipping has been around for a long time now.

Curves do seem to have the greatest effect in my experience with regards to slipping, much more than setting weather to snow but even still there's times when it doesn't slip when it really should!

just thought id say as a rule locos with a 4-6-0 wheel arrangement don't tend to slip easily due to the weight of the boiler and firebox being over the 6 driving wheels but a loco which has a 4-6-2 wheel arrangement can slip quite easily if your not careful this is because the rear bogie tends to lift the driving wheels ever so slightly. Loco's with an 0-6-0 wheel arrangement are hard to slip due to all the weight being on the driving wheels (although i can personally say iv made a pannier spin its wheels although we did have 10 mk1's on the back and it was raining ).

making a modern (ish) loco spin its wheels can easily be done by going to full power from a standing start when pulling a train (i did it with a very suborn class 66 a few weeks ago even they it wouldn't move for love nor money i had to fail it in the end )

plewsy2105

plewsy2105 wrote:just thought id say as a rule locos with a 4-6-0 wheel arrangement don't tend to slip easily due to the weight of the boiler and firebox being over the 6 driving wheels but a loco which has a 4-6-2 wheel arrangement can slip quite easily if your not careful this is because the rear bogie tends to lift the driving wheels ever so slightly. Loco's with an 0-6-0 wheel arrangement are hard to slip due to all the weight being on the driving wheels (although i can personally say iv made a pannier spin its wheels although we did have 10 mk1's on the back and it was raining ).

making a modern (ish) loco spin its wheels can easily be done by going to full power from a standing start when pulling a train (i did it with a very suborn class 66 a few weeks ago even they it wouldn't move for love nor money i had to fail it in the end )

plewsy2105

Exception to every rule and all that... weren't Bulleid's Q1s fairly notorious for slipping?

Exception to every rule and all that... weren't Bulleid's Q1s fairly notorious for slipping?

possibly not sure though

plewsy2105

Interesting. Imma have to try some different things out and see if I can find common ground with wheel slip working.

Now, when can we do full on rail burn outs?

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

I can remember that incident well,was about half way down the train,we were all shouting "shut off,shut off,shut off!!" then realised he wouldnt hear us!

its an intresting video to be sure. Wonder how much damage it did to the rails?