[ARC5] Locomotives

[Geoff]

And there is always the sand bucket available when needed.


----- Original Message ----- 
From: "Neil" <neilb at ihug.co.nz>
To: "arc5" <arc5 at mailman.qth.net>
Sent: Thursday, December 20, 2012 4:19 AM
Subject: Re: [ARC5] Locomotives


> When a steam locomotive is stationary, the crank pins on the driving 
> wheels
> may be at rest in the same horizontal plane as the wheel bearings, with 
> the
> driving gear either fully retracted or fully extended. This means there 
> will be
> no motive force applied to the wheels at start-off, just when it is most 
> needed.
>
> For this reason, the crank pins on the left side of the locomotive are 
> offset 90
> degrees from those on the right, so at start-off only one side actually 
> gets the
> train moving until the wheels have rotated a few degrees.
>
> 73 de Neil ZL1ANM
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