david_watts1 Posted October 18, 2022 Share Posted October 18, 2022 Are the wheels on the pony trucks of the Pacific locos going to have flanges or will they be flangeless? I really hope they do have flanges and still negotiate rad 2 curves. Link to comment Share on other sites More sharing options...
96RAF Posted October 18, 2022 Share Posted October 18, 2022 One of the detail close up pictures of the A4 Frey posted of the Kings Cross exhibition locos clearly shows the rear truck overhanging the rails, so flangeless and fixed is my opinion. Link to comment Share on other sites More sharing options...
RDS Posted October 18, 2022 Share Posted October 18, 2022 Fascinating, I always thought of Pony Trucks as being at the front of the Loco where presumably they must always have flanges. Link to comment Share on other sites More sharing options...
Hobby11 Posted October 19, 2022 Share Posted October 19, 2022 That looks more like it's derailed! Link to comment Share on other sites More sharing options...
Silver Fox 17 Posted October 19, 2022 Share Posted October 19, 2022 RDSPony wheels are where there is only one axle, if there are two axles it is a bogie.A prairie is a 2-6-2 so has a pony truck at either end.A 4-6-2 has a bogie at the front and pony truck at the rear.A 2-6-4 has the pony truck at the front and bogie at the rear.GarryRDS Moderator Note: Thanks Garry you learn something everyday. Link to comment Share on other sites More sharing options...
Gray1707818712 Posted October 19, 2022 Share Posted October 19, 2022 Looking at the pics posted here, the pony truck wheels are definitely flangeless. Bit disappointed to see that TBH. https://uk.hornby.com/community/forum/hornby-tt1120-in-the-flesh-329827?ccm_paging_p=3&ccm_order_by=&ccm_order_by_direction= Link to comment Share on other sites More sharing options...
david_watts1 Posted October 19, 2022 Author Share Posted October 19, 2022 Yes, they do look to be flangeless, but WOW, look at that cab detail. Link to comment Share on other sites More sharing options...
Fazy Posted October 20, 2022 Share Posted October 20, 2022 the trouble with the big engines is the length of the loco vs the toy like curves.the older models used to make the pony truck swivel. However on the real things the bit you see is part of the main frames and dose not move. They are not pony trucks the big coronation’s and Royals use Bissel trucks the LNER used a different set up called Cartazzi truck.The problem with this is due to scalling down and the thickness of plastic needed to make the chassis robust enough for everyday use give rise to the problem of not enough room to fit a sliding wheel.there’s are two work rounds well keeping the ability to use smaller curves, make the thing a pony truck and give it a flange wheel (doesn’t sit well with greater detail for the model). Or design the chassis properly and remove the flange (not such a bad idea but looks wrong on smaller curves).A 3rd way would be a bigger curves on your layouts but set curves would need to be something like 8 or 9 radius, the bigger the better. Link to comment Share on other sites More sharing options...
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