4700mm

My example of 66001 arrived yesterday and whilst it looks and runs fantastic I have had a couple of issues. The first is a high pitch whine when moving and wagons coupled to it will derail on 2nd and 3rd radius curves, this seems to be caused by the coupling having restricted movement so its pulling the wagon off to the outside of the curve and off the track.

The peco structures are based on Mk3 equipment although I can't say which version which gives a nominal contact wire height of 4.7m or 4.72m above the rail level. Designers are allowed to bring the contact wire down to 4.165m to clear tunnels, bridges, signals etc.

On 20/01/2024 at 17:00, Ravel said:

Thought it was best to ask here,

 

I am planning to build a model based loosely on somewhere between Crewe and Cheadle Hulme, there are a number of "gantry" style portals dotted about, are these drawn to specific site requirements or is there a generic design that is just adapted?

 

I don't seem to be able to find many dimensions, other than height, for 2 track "half gantry's". I've measured a couple on Google Maps and they appear to be roughly between 9.7m to 11m in width across two tracks.  Cess to Cess measurements appears to be anywhere between 9m to 11m, so I guess they can't be much bigger than that?

Structures are designed to the requirements of the site. Designers use a general arrangement drawing and select the parts needed for their requirements, the height of the portal and the length of the portal boom will vary from structure to structure.

On 15/10/2023 at 21:20, Edwin_m said:

Most European systems follow the German BOStrab to some degree although it's not mandatory to do so.  This doesn't appear to specify voltage but by implication does allow on-street voltages of up to 1500Vdc.  

 

The UK guidance references EN51063, which I can't access but may say something on maximum voltage.  

 

Thanks for clarification on Jerusalem.  I was actually involved in an unsuccessful bid for the extension a few years ago and was trying to remember the voltage.  

 

I think that should be EN 50163 which gives the highest nominal DC voltage as 3kV with a note that says "Future d.c. traction systems for tramways and local railways should conform with system nominal voltage of 750V 1500V or 3000V.". I cannot see anything specific for street running.

I'm only an OLE person so not competant to comment on most of the dimensions but I noticed you're missing the dimension of the running edge to the platform offset which group standard GIRT7020 gives as 730-745mm for most locations. Scaling that down should be fine for P4 but would need to be increased for curves.