can 365s be converted to work at 110 mph?

[A-driver]

They absolutely will look at some things and say just that. Thats the point in risk assessment. If everything is worst case then no risk assessment is needed as everything would be treated with the same level of risk. Judging severity against probability is a key part of risk assessment and is used to derive an issues 'score'.

Worst case scenario of a pacer on a mainline is a serious accident involving it being hit whilst stationary and full. However pacers are not, as a result, banned from mainlines. Why? Because the risk assessment has shown that whilst the consequences are very bad, the probability of it occuring is sufficiently low.

That is rubbish-any train hit in the mainline at sufficient speed will react in the same way. Yes of course the worst case scenario will often be a collision and they don't ban them or else they wouldn't be fit purpose. But measures are certainly taken to reduce the chances of a collision and that is why the risk us fairly low-TPWS/AWS/DSD/fail safe brakes are all measures taken to guard against this worst case scenario of a collision.

 

[Goatboy]

My point is that the existence of a risk assessment means 'worst case scenario' is not the basis for all decisions. How can it be? You wouldnt need a risk assessment if it was, as every risk would be red and no assessment would be neccesary.

 

[A-driver]

My point is that the existence of a risk assessment means 'worst case scenario' is not the basis for all decisions. How can it be? You wouldnt need a risk assessment if it was, as every risk would be red and no assessment would be neccesary.

I understand where you are coming from, I think we have been miss interpreting each others terminology but I do understand what you are saying.

 

[MOONY]

What does "balancing speed" mean please?

 

[millemille]

What does "balancing speed" mean please?

The speed at which, on half sized wheels with no passengers on board and on level track with the power supply at the lowest normal operating voltage, the tractive effort is balanced by the rolling resistance and air resistance and the train can go no faster.

 

[DXMachina]

^ Thanks for the explanation

Half-sized wheels - is this to be read as 'halfway between max and min allowable circumference'? I assume there's a range of permitted sizes based on wear..

 

[millemille]

^ Thanks for the explanation

Half-sized wheels - is this to be read as 'halfway between max and min allowable circumference'? I assume there's a range of permitted sizes based on wear..

Yes, wear and tyre turning for profile recovery and damage removal.

365's wheel size range from a maximum of 844mm dia new to 776 scrap.

 

[MOONY]

Many thanks people.