RP29

If the drivers are push fit on axles, I would normally tap an axle end in situ with a drift to open out b-t-b. But be cautious on this model, bearing in mind the compensation.

 

Probably better to discover how the keeper plate is removed, and drop the wheelsets out. Then support each one in a slot in a steel plate over the vice jaws, administer a gentle tap on the axle end, and re-measure. This procedure is pretty reliable in ensuring no disturbance to either quartering or true running, although one has to be careful that the back of the wheel is flat: no protrusion of a projecting crankpin on the wheel rear lying on the plate for example.

Thanks for that. Not sure if I want to try it for the first time on a £200 model!

Robert,

 

Back to Back varies between 14.10mm and 14.20mm for the drivers. The Pony trucks are 14.20mm and 14.30mm on mine.  As I am not an OO modeller what would you expect?

 

Tony

That's going to be very tight. Anybody have advice on how to open driving-wheel B2Bs? Anybody tried one on 00SF track yet?

Robert

Lots of interesting stuff about appearance, but has anybody measured B2B on the Garratt models? Some Heljan models apparently have small B2B and it might be useful for those of us how make 00SF track to know what it is.

Robert

Does anybody have any idea of how we might learn what back-to-back setting Heljan will use for the Hattons/Heljan Garratt? On page 9 (posts 209, et seq.) of the Eastwood Town thread (blog?) on RMweb there is a discussion of B2B wrt 00-SF trackwork. There it is stated that Heljan use a B2B of 14.2 mm and that this is uncomfortably small. The thought of a Garratt is very attractive, but the thought of trying to increase the B2B on so many axles isn't.

Robert