--- In [email protected], "richgajnak" <rustytraque@...> wrote:
>
> There's several ways a manufacturer can deal with drivers.
>
> 1: Correct driver size and space out axles to compensate for flanges. This
> is the least desirable, it may require "stretching" the locomotive to look
> right.
>
> 2: Correct axle spacing, correct driver size, blind center drivers.
>
> 3: Correct Axle spacing, undersize drivers, enough to compensate for all
> wheels flanged.
>
> But, all is not lost. There is some built in leeway. There is some space
> between the flanges on the prototype. Prototype wheels not flange-to-flange
> with no space inbetween.
>
> On the N&W Y6b 2-8-8-2 for example, the driver size was 58". The axles were
> spaced 63" apart. That's a whole 5"(a little less than 3/32" in S)to play
> with.
>
> Rich G(ajnak)
>
Correct, Rick in all cases.
When I started on the CNR Hudson project using 79" OMI drivers, I spaced the
axels prototypically because the CNR used 80" drivers. This was still too
close and I could not use the test shot. I measured everything and on paper it
seemed okay. I added 2 scale inches to the axel spacing and everything is
great! Sometimes the boiler has to be extended and sometimes not.
I am not a B&O modeller but I thought the E27 had blind centre drivers.
cheers,
Andy Malette
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