| LS73 LOCOMOTIVE BOGIE PIVOT PLATE
At Comet Models we are active modellers ourselves, and we come up against the same problems as you when we make our own models. One problem that has caused us grief for a while is the tendency for the trailing wheels on the front bogie of a 4-6-0 or 4-6-2 loco to foul the brakes on the leading driving wheels when the locomotive travels on curved track, even if that curve is quite a generous radius. This is a common situation with LMS and BR locos, and these photos show how little space there is between the bogie wheel and the leading brake shoe. This side on photograph of our Britannia chassis shows how close the rear bogie wheel is to the front brake |
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And in this photo we can see the same situation in our Royal Scot kit |
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One solution to this problem has always been to remove the leading brakes, and that technique has been used on this model of Turbomotive |
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Having given the matter some thought, we came up with the idea of a new product, Code LS73, to try and solve the problem. We have produced a small brass etch to which the front bogie is attached, and instead of the more usual swing arm arrangement the bogie travels sideways in a curved slot. But, (and this is the clever bit!) the slot is concave towards the front of the loco. That means that when the bogie goes off-centre, i.e. when the loco is travelling around a curve, the bogie is moved further forward, away from the leading brakes and thus reducing the chance of the wheels fouling the brakes. A further benefit of the arrangement is that the springy brass etch can be configured, perhaps with the addition of a suitable spring, to bear down lightly on the top of the bogie to aid its roadholding. Here you can see the shape of the Bogie pivot plate, LS73. Each pack contains 2 plates, sufficient for 2 locos. The included washer is soldered over the slot in the arm of the pivot plate so that the bogie is in the correct position in relation to the loco frames, and then the plate is bolted in place on the chassis. You can read the full instructions for the use of this product if you look at the pdf file alongside the entry for LS73 in the Locomotive Components section of the Catalogue on this website. |
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