The whole thing about it only being a 4-wheeler in disguise has already
been brought up but no-one has mentioned whether or not the locos are at
their traction limits or not.  Was the #24 slipping to a stop?  If not it
may be due to the slightly larger drive wheels which will contribute less
torque to the rail for the same piston bore X stroke.  Also, the greater
weight of the loco may be causing it troubles on that extreme grade.  It's
the same as pulling a heavier train with roller-bearing wheelsets.  ;]

Just some thoughts.

Trot, the theoretical, fox...

On Tue, 4 Jun 2002, Gary wrote:

> Regarding SR&RL #24 pulling far less than Fowler....  using Roundhouse info
> from http://roundhouse-eng.com/
>
> Fowler weight according to Roundhouse:  weight 3.25 Kg - loco  or 1.0833 Kg
> per axle
>
> SR&RL #24  weight:  weight 4.25 Kg - loco  or weight per axle of 1.4167 Kg
>
> Both models have three axles or six drive wheels.
>
> Therefore normal logic would indicate the SR&RL #24 should pull steeper
> grades than the Fowler since axle loading is higher for #24.
>
> Of course the newer Forney weighs in at 3.3Kg with two axles or 1.65 Kg per
> axle!
>
> So, the question is, "If Fowler pulls much better than the SR&RL #24, why?"
>
> Gary Lane
> Eugene, Oregon, USA, earth


 /\_/\        TrotFox        \ Always remember,
( o o )  AKA Landon Solomon   \ "There is a
 >\./< [EMAIL PROTECTED] \ third alternative."
 

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