grovenor-2685 wrote:It really is not necessary to quote the Chairman's entire message to add a hear hear or another couple of lines
Sorry Keith! Post duely edited!
Martin,martin goodall wrote:In answer to ‘Flymo’, I confirm that all of my wheels are replacement EM wheelsets, in practice from Kean-Maygib (the steel ones – excellent) or from Alan Gibson (8-spoke and split-spoke).
Flange depth (0.25mm deeper) is not the only difference; the flange width at the flange root is also wider (by 0.1mm i.e. 0.5mm for EM compared with 0.4mm for P4), which is well within the flangeway clearance of track built to P4 standards. (I will return to that point below – there is a reason for that.)
These are ‘fine-scale’ flanges. I understand that the ‘finescale’ 00 wheels supplied by Alan Gibson are exactly the same – the only difference is the back-to-back setting. There is certainly no question of getting coarser-scale flanges to go through P4 crossings. In the early days, EM gauge was just 00 gauge with the rails and wheels pulled out to the wider gauge, but those days are long gone.
martin goodall wrote:Flange depth (0.25mm deeper) is not the only difference; the flange width at the flange root is also wider (by 0.1mm i.e. 0.5mm for EM compared with 0.4mm for P4), which is well within the flangeway clearance of track built to P4 standards.
Bilton Junction wrote: The possibility of square ended self-quartering S4 axles was dangled before us a while ago by Alan Gibson Workshop but I have not seen any news of further development.
rjh wrote: published dimensioned drawing(s) of the aforementioned EM/00F wheel profiles used by Messrs. Kean-Maygib and Gibson
Bilton Junction wrote:I don't know, but the idea sounds tempting. Not strictly a question about wagons, so perhaps not an appropriate question in this section.
Four wheeled wagons and coach bogies don't seem to be the problem.
Is it possible to use EM driving wheels on a pacific and get them through S4 track? I ask because I wonder if it is possible to pack out Romfords EM axles to S4 back to back?
DaveyTee wrote:A little off topic ("Wagon" suspension), but I assume that while rolling stock with EM profile wheels runs on P4 track, the same cannot be said of locos?
Exactoscale wheels do have a dead-scale tyre width, and quite frankly it is too narrow for practical model railway use – hence the problems encountered by DRAG (and also by others who have tried using them). The 2mm tyre width normally specified for P4 carriage and wagon wheels is over-scale, but is a sensible compromise.
Brian Harrap wrote:Heck, it's taken me nearly as long to read about what wheels and things I should have been useing all these years than it actually took me to build the layout. Regards Brian.
jim s-w wrote:Hi All
I still cant help thinking after all of this discussion that the EM wheel thing is a solution to a problem we don't have. All this talk of "it will work fine if you get your track laying bang on" is a bit of a red herring as after all, if your track is spot on then P4 rigid will work without any problems. Its actually pretty surprising just how bad P4 track has to be for simply re-wheeled RTR to not work! Our test track is truly shocking but RTR stuff runs round it all night!
martin goodall wrote:
Hauling RTR stock with P4 wheels (with no springing or compensation) round a main line may be fine, but propelling the stock through pointwork may be slightly more problematic.
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