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Re: Locomotives for Fife circle services?

On 14 May, 14:55, David Hansen <SENDdavidNOhS...@spidacom.co.uk>
wrote:

> I wonder what the balance is between this and sending signals down
> existing cables, which was used to control diesel locomotives in the
> past including those passing through Fife, though from a DVT as
> opposed to a leading locomotive? If one end of the equipment could
> be fitted in a Class 47 it can't have been that big even using late
> 1970s engineering.

They did have an empty boiler compartment at their disposal.

> It wouldn't take a lot to put a pressure sensor
> in the control air pipe of a leading locomotive and convert that to
> a signal to be sent to the other end, whether by cable or radio.

The Regulating Air Pipe isn't actually crucial to Blue Star working.
It's purpose is to equalise the pressure on the two locos (each locos
governor still passes air).  If you have two well-maintained locos, so
the pressure can be relied upon to be similar within fairly reasonable
limits, the jumper cable alone will suffice.

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