Bisto

Thanks to all for your very helpful replies. I decided to offset the pivot point by 2mm and it seems to have worked.

Yes, I'm sorry I didn't make that clear.

Thanks! I had my doubts, which is why I asked. I think two fixed axles in the middle with a pivoting pony truck at each end would definitely work, but would two fixed axles at one end and a pivoting bogie at the other end also work? - essentially the same arrangement as a 4-4-0 locomotive.

I'm re-wheeling a Hornby Dublo breakdown crane and I want to do it by using two 4 wheel bogies inside the frames. I have a problem with one of the bogies in that the crane cab pivot is very close to the centre point between the axles where the bogie pivot would normally be. Is there any reason why I should not position the bogie pivot a few mm off-centre? Or would a configuration of 2 fixed axles and one pivoting bogie work better?

I think I've worked out how to do a crossover between first and second radius using the older type of curved turnout (ST242 and ST243). The sketch shows the ST numbers of the track components needed. Unfortunately I don't have all the pieces so I haven't been able to actually assemble it.

Both sizes were in the shops around that time - I bought some of each. I suppose the retailers were using up their stocks of the older type.

Perhaps they were only on sale for a short time. Shown is the 2nd radius Setrack turnout with the much smaller first radius one for comparison. The inside curve is perfectly congruent with a first radius Setrack curve.

I've found several Peco Setrack code 100 1st radius curved turnouts amongst track I last used about 20 years ago. I don't have the packaging or any printed product information and I can't find anything about them online except that Peco dropped them from the range at some point because they were unsuitable for new locomotives being produced by Bachmann and Hornby. I'm thinking about possibly using a couple of them to make a shunting puzzle. They could, I suppose, also be used to take a branch or siding off the outside of a 1st radius curve. But I would like to know how they fitted in to the Setrack geometry and in particular how to use them to transition from first to second radius and what other track pieces would be needed for this. I appreciate that this probably doesn't work very well, but I'm only using short locomotives and short wheelbase rolling stock. I can't even find the ST-xxx numbers so any information at all about this product would be greatly appreciated.