Difference between Class 142 and 143 trains

[Mikey C]

The 143/144 were built using components from the Alexander P-type bus body.
https://www.flickr.com/photos/8050359@N07/5691430306

That thing makes the Pacers look quite attractive

 

[anamyd]

Which is why I mentioned structural soundness in my initial post in the subject. Bu definition this would rule out the worst of them i.e. the 108s, those with asbestos, the 104s which were rather rusty.

what about the structural soundness of Pacers...? nothing ever seems to be said about trains structurally deteriorating, apart from body corrosion. the only exception I can think of is when 142-073's chassis cracked and ATW withdrew it and then TfW repaired (welded...?) it and recomissioned it.

 

[dubscottie]

what about the structural soundness of Pacers...? nothing ever seems to be said about trains structurally deteriorating, apart from body corrosion. the only exception I can think of is when 142-073's chassis cracked and ATW withdrew it and then TfW repaired (welded...?) it and recomissioned it.

The early 158s have issues also. The truth is that the structural life of aluminium for rail passenger vehicles is an unknown. The class 158 will be the real test as they were the first.

 

[anamyd]

The early 158s have issues also. The truth is that the structural life of aluminium for rail passenger vehicles is an unknown. The class 158 will be the real test as they were the first.

apparently aluminium doesn't rust but does corrode. Vivarail are reusing 40 year old aluminium bodies on the D-Trains.

 

[61653 HTAFC]

what about the structural soundness of Pacers...? nothing ever seems to be said about trains structurally deteriorating, apart from body corrosion. the only exception I can think of is when 142-073's chassis cracked and ATW withdrew it and then TfW repaired (welded...?) it and recomissioned it.

That was an issue in the aftermath of the Winsford collision where the bodyshells of the rearmost unit separated from their chassis. IIRC a modification was made which lowered the chances of this happening.

 

[anamyd]

That was an issue in the aftermath of the Winsford collision where the bodyshells of the rearmost unit separated from their chassis. IIRC a modification was made which lowered the chances of this happening.

weren't (aren't) the bodies just tie-wrapped (or whatever it's called) to the chassies...? i was referring more to rot than seperation!

 

[themiller]

That page for the 142s also says that the body structure was "Aluminium Alloy (bus body sections) on steel frame". I was under the impression that the panels on the Leyland National were galvanised steel, and that the 142 more or less used standard parts with some extra components to provide the extra width.

I think that this photo shows a complete lack of aluminium because of the rust showing therefore all is steel.

 

[507 001]

The early 158s have issues also. The truth is that the structural life of aluminium for rail passenger vehicles is an unknown. The class 158 will be the real test as they were the first.

The PEP family all had aluminium bodies long before the 158.

 

[Mikey C]

The PEP family all had aluminium bodies long before the 158.

Plus London Underground stock before then. The A stock operating out to Amersham operated mainly in the open as well

 

[507 001]

Plus London Underground stock before then. The A stock operating out to Amersham operated mainly in the open as well

Indeed! Forgot about that.

 

[Sprinter107]

The 143/144 were built using components from the Alexander P-type bus body.
https://www.flickr.com/photos/8050359@N07/5691430306

Yes. That's the one. I couldn't think of the type at the time. I knew the 143 and 144 were also based on a bus type being built at the time.

 

[ajrm]

The 143/144 were built using components from the Alexander P-type bus body.
https://www.flickr.com/photos/8050359@N07/5691430306

Which components, out of interest?

 

[dubscottie]

The PEP family all had aluminium bodies long before the 158.

Sorry I was referring to aluminium extrusion construction. The PEP family used alloy body panels on a steel frame as far as I know.

Which components, out of interest?

I am not 100% sure but I would think some structural items, body panels, windows, doors, seats etc.

 

[Mitchell Hurd]

The Class 143 is also very slightly heavier then a 142 - I believe the 143's tend to smoke a bit more too than a healthy 142. Anyone who saw the 12:20 Lancaster train at Leeds, 3-coach 144, will no what I mean.