Class66s

It does seem some use, although what these services convey I don't know. Seems to run about once a week that way, including today. https://www.realtimetrains.co.uk/service/gb-nr:B24089/2022-06-07/detailed

Hi 5944, Thank you for the useful picture showing the bogie pivot, does anyone know if the wheel set was near new (800mm) in this picture, so I can use it in combination with others as a reference?

Hi all, thank you for your responses, whilst looking for more information I found a couple of papers about on research gate, but I've had trouble with their website, and am not sure if it worked when I requested the full text for them: https://www.researchgate.net/publication/298444070_SF7000_-_Innovative_Bogie_concept_in_answer_to_Whole_Life_Cost_models If it turns out the full scale unit transfers the forces through the air cushion, I had thought of a potential way of going without a centre pin, by cutting slots in the top of the model cushion, to allow it to rotate on these. There would then be some sort of pin to lock the bogie into the slot, perhaps a small screw into the bottom of the carriage body on each side. When we know more and I've finished my coursework I'll try and do a more comprehensive drawing, but attached is the basic concept, I have no idea how well it would work! Though whilst looking through google images, I found this side on view, which shows a rectangular sort of slot, which would make sense to be for a bogie pin. Mark

Thanks, those pictures are really useful for bogie details and thank you seraphim for your explanation of the pivot question, now all I have to do is figure out how to use a CAD package. Unless anybody knows anymore of the dimensions, wikipedia seems to note the wheel diameter is between 820 and 760 mm, so I suppose I'll work from those as a reference. Thanks for your quick responses. Mark

Hi all, Over the past few weeks I've been thinking about building a class 700 in 4mm, and whilst looking around for prototype drawings, I've been looking at pictures of the bogies. I can see both forms of suspension, the air cushion and the hydraulic(?) attached to the side, however I can't see where a pivot would be installed, which has me questioning most EMU and DMU bogies - I'm assuming they all have something which allows them to pivot, am I missing something? In this picture I can see a pattern inbetween the suspension, is this a mounting point? I did find what is supposedly a top view of it here, which I cannot see anything that resembles somewhere to mount a pivot, but unfortunately I cannot access the article to find their source for this picture. Do the air suspension cushions the bogie to pivot, or is there something I'm not seeing? I have seen the impressive thread of the 3D printed version, but it didn't really answer my question about the real thing, and the thread appears to have gone cold. I've spent a few hours googling around on the subject, but there doesn't appear to be alot of information. If anyone could enlighten me, I'd be grateful. Thanks Mark

Sorry if this is in the wrong place or has been posted about before (did some googling before but didn't find anything), but a question I have wondered recently is when a manufacturer wishes to make a model, especially of a modern day piece pf stock from? For example, Revolution Trains is releasing a model of TPE mark 5a coaches, when designing this, where do they get dimensions from. Do they contact the manufacturer of the real-world prototype, or do they go out and approach the operator to get measurements? Thank you, Mark