New Hornby Princess Royal

Members Forum RTR Conversions Locos New Hornby Princess Royal

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    • #240717
      Alan Kitching

        Has anybody tried to convert one of the latest Hornby Princess Royals to EM?

        I bought one recently expecting it to be essentially similar to other larger Hornby models of recent years with 3mm driving axles and 2mm axles for the rest which would enable the use of standard commercial replacement wheels from Markits or Ultrascale (not made by Gibson). However this loco actually has 2mm driving axles and 1.75mm for the rest and all the visible wheels have blind axle holes with moulded hubs. I have tried using the Hornby drivers regauaged which requires new axles. The wheels are only marginally thicker than Gibson for example but there is negative clearance with the splashers, valve gear and brakes etc.- again tighter than other locos I have converted recently.

        Thoughts most welcome.


      • #241061
        Philip Hall

          If you require 2mm driving axles Ultrascale will often supply that size axle if you order a set of wheels. Suggest you give them a call to ask if they can help. It’s usually a matter of making a new plug for the axle in the mould but I think they would only want to do that if they have a firm order. It might also be possible – again you’ll have to ask specially – for the wheel to be moulded with a larger boss on the back, which might remove the need for packing washers and also provide a longer axle hole and therefore grip and stability – it’s a very big wheel and a very small axle.

          The other wheels: Just a matter of opening out the holes in the front bogie and the tender, or widening the slots in the tender chassis if it the usual Hornby method, although on the tender I would think pulling the wheels out in the axles would be OK. The rear truck on the engine: I would just run it with the flangeless Hornby wheels as supplied, maybe just relieve the bearing a touch so the wheel slightly touches the track. The extra width of a Hornby wheel should nit be obvious and will help as the engine goes around curves.

          Philip Hall

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