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Author Topic: Mineral hardness scale for amended journeys  (Read 1008 times)
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« on: July 07, 2018, 08:48:46 am »

There are ten minerals in Mohs scale: talc, gypsum, calcite, fluorite, apatite, feldspar, quartz, topaz, corundum and diamond.

Would it be useful for us to described how damaging the effect of a change from plan for trains is using the Mohs scale - for example, this morning here is an example of Talc - a train on which a reduction from 3 cars to 2 isn't going to be any sort of problem, and it still makes all of its calls at the planned time.

08:22 Westbury to Swindon due 09:07
Facilities on the 08:22 Westbury to Swindon due 09:07.
This is due to more trains than usual needing repairs at the same time.
Will be formed of 2 coaches instead of 3.

An example of Diamond - should be very rare - is a meltdown such that passengers cannot make their journey to arrive within 3 hours of when they had planned, alternative replacement transport not provided.

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« Reply #1 on: July 07, 2018, 09:47:27 am »

Ah Mohs' Hardness Scale - that take me back several decades. I once successfully scratched a quartz pebble with a diamond I found on a pre-Namibian beach. Last night's signal failures and subsequent cancellations at Reading were about calcite in effect though I was was fearing an apatite attack. For finer granularity, your fingernail is 2.5 and your compass point is about 6.5.
Red Squirrel
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« Reply #2 on: July 07, 2018, 10:08:48 am »

I thought Moe's Hardness Scale was:

Duff Beer; Henry K. Duff's Private Reserve; Tuborg (The Beer Of Danish Kings); and Red Tick Beer, a beer flavoured with dogs.
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« Reply #3 on: July 07, 2018, 10:56:35 pm »

I thought Moe's Hardness Scale was:

Duff Beer; Henry K. Duff's Private Reserve; Tuborg (The Beer Of Danish Kings); and Red Tick Beer, a beer flavoured with dogs.

Being totally unscientific my first thought was also connected with that yellow family  Cool

Personal opinion only.  Writings not representative of any union, collective, management or employer. (Think that absolves me...........)
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