Jawfin Posted January 21, 2013 Share Posted January 21, 2013 Thanks. Say if they were on BR or something, would there be any other way to classify the wheel arrangement? Link to post Share on other sites More sharing options...
Horsetan Posted January 21, 2013 Share Posted January 21, 2013 Interesting one. I think they might still be classified "C", as the wheels are not coupled together in the traditional way. Link to post Share on other sites More sharing options...
Jawfin Posted January 22, 2013 Share Posted January 22, 2013 Yeah, stupid idea to do that. This leaves them unbalanced, which caused a bad accident involving 421, so CIÉ limited them to 25mph. Was there any advantage for a wheel arrangement like this? Link to post Share on other sites More sharing options...
Horsetan Posted January 23, 2013 Share Posted January 23, 2013 Yeah, stupid idea to do that. This leaves them unbalanced, which caused a bad accident involving 421, so CIÉ limited them to 25mph. Was there any advantage for a wheel arrangement like this? Nothing intrinsically wrong with the "C" arrangement - diesels have been running on a pair of "C"s for decades! If the Es/421s have a drivetrain anything like a "C" bogie, then I would have thought that there would be three traction motors, on driving each axle. The question is where the unbalancing (if any) occurred. Link to post Share on other sites More sharing options...
Jawfin Posted January 24, 2013 Share Posted January 24, 2013 Nothing intrinsically wrong with the "C" arrangement - diesels have been running on a pair of "C"s for decades! If the Es/421s have a drivetrain anything like a "C" bogie, then I would have thought that there would be three traction motors, on driving each axle. The question is where the unbalancing (if any) occurred. Whatunderstand is that the unbalancment was caused by the C arrangement (which wasn't spread evenly), which in turned caused the locos to ride badly above a certain speed (they had a top speed of 60 mph), which in turn derailed the loco and/or the train. I suppose that curves and points wouldn't help either Link to post Share on other sites More sharing options...
doctor quinn Posted February 20, 2013 Share Posted February 20, 2013 If the Es/421s have a drivetrain anything like a "C" bogie, then I would have thought that there would be three traction motors, on driving each axle. The question is where the unbalancing (if any) occurred. I took a look at Wikipedia, they had hydraulic transmission, presumably the torque converter was between the 2rd & 3rd axles hence the unequal wheelbase. Though as German, Italian and other builders have used a similar arrangement successfully, it doesn't explain the derailment issue. They do look cool though, I just spotted a 00 body on Shapeways site. All the best Nick Link to post Share on other sites More sharing options...
Jawfin Posted March 4, 2013 Share Posted March 4, 2013 Very interesting...Just looked at the shapeways website, and they have a lot of IR stuffLots of stuff!I wonder how you would modify a chassis for an authentic E class Link to post Share on other sites More sharing options...
ben racey Posted March 6, 2013 Share Posted March 6, 2013 HI guys, Hollywood Foundry will certainly be able to help you out with a suitable chassis. Please find attached a few photos of my model of the E class. It's the shapeways body, with overlays for the rivet detail, fitted with a bullant chassis to the correct wheelbase, including the odd asymetric effect - it's 21mm gauge too! Not that I've any track to run it on at present.... Quite pleased with it, bar the cab windows, which could have come out better, but there you go.... Regards Richard. Link to post Share on other sites More sharing options...
Jawfin Posted March 16, 2013 Share Posted March 16, 2013 Thanks Richard, never thought I'd see something like that! BTW, here is a pic of poor 421 after the accident: http://www.flickr.com/photos/nlireland/8533867828/in/faves-flyingsnail/ Link to post Share on other sites More sharing options...
Horsetan Posted March 16, 2013 Share Posted March 16, 2013 Ah....now I see the full broadside view for the first time, I understand why it might look a little unbalanced..... Link to post Share on other sites More sharing options...
Jawfin Posted March 17, 2013 Share Posted March 17, 2013 t was found that it was hurtling down that line at over 50mph, and they were prone to leaning (if that's the correct term) on rails, even at relatively low speeds. Link to post Share on other sites More sharing options...
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