D125 - what is it??

Douglas Black · Posted: Sun Jul 08, 2007 8:10 am Post subject:

andersley wrote:

What is it made of?

Some kind of heavy durty carbon-fibre, based on a couple of chips in it............

Darryl · Posted: Sun Jul 08, 2007 8:26 am Post subject:

I can't imagine what specifically it is, but is the D125 a reference to a signal? Signals all seem to have a letter-number combination so maybe this is something to do with signal number D125, wherever that happens to be?

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andersley · Posted: Sun Jul 08, 2007 1:02 pm Post subject:

With the textures surface, it has to be something you step on?

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Alan Curtis

Douglas Black · Posted: Sun Jul 08, 2007 1:23 pm Post subject:

I have been told by a railway employee that it may have something to do with APT runs on the WCML.....

??

Darryl · Posted: Sun Jul 08, 2007 1:25 pm Post subject:

Douglas Black wrote:

I have been told by a railway employee that it may have something to do with APT runs on the WCML.....

??

Is that all you know, or a crypic clue to leave us guessing for a few more days?!

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Douglas Black · Posted: Sun Jul 08, 2007 1:26 pm Post subject:

Darryl wrote:

Douglas Black wrote:

I have been told by a railway employee that it may have something to do with APT runs on the WCML.....

??

Is that all you know, or a crypic clue to leave us guessing for a few more days?!

To be honest, that`s all I know...... Confused

Darryl · Posted: Sun Jul 08, 2007 1:29 pm Post subject:

Is it from an APT? Maybe one of the floor panels or undercarriage panels from somewhere along the unit?

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Douglas Black · Posted: Sun Jul 08, 2007 1:35 pm Post subject:

Darryl wrote:

Is it from an APT? Maybe one of the floor panels or undercarriage panels from somewhere along the unit?

No, it`s somekind of lineside item/sign/marker.......

Question

Intermodalman · Posted: Sun Jul 08, 2007 3:25 pm Post subject:

Is it referring to 125 Miles from London. and it is a Marker on the down side?

Douglas Black · Posted: Sun Jul 08, 2007 4:09 pm Post subject:

Intermodalman wrote:

Is it referring to 125 Miles from London. and it is a Marker on the down side?

Sorry, I have no idea. I had hoped I may get more info from here.........

Intermodalman · Posted: Sun Jul 08, 2007 4:13 pm Post subject:

Thats the best guess i have..

aptp · Sleeper Joined: 12 Sep 2007 Posts: 3

that THING is a transponder that told the APT what the enhanced line speed was at that point, the D is for a diverging junction and the 125 is the speed in MPH

See my site for more detail -

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Best wishes

Rob

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Douglas Black · Posted: Thu Sep 13, 2007 11:27 am Post subject: Re: C-APT Transponder

aptp wrote:

that THING is a transponder that told the APT what the enhanced line speed was at that point, the D is for a diverging junction and the 125 is the speed in MPH

See my site for more detail -

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Best wishes

Rob

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What happened to this transponders? Have any of them found their way into museums??

andersley · Posted: Thu Sep 13, 2007 11:28 am Post subject:

Wonderful! I thought we would never know! Welcome aboard aptp. Cool

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Alan Curtis

aptp · Sleeper Joined: 12 Sep 2007 Posts: 3

TRA at Crewe have several - I mounted one on the track infront of the APT-P

Rob

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