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Author Topic: Mineral hardness scale for amended journeys  (Read 820 times)
grahame
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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.

Quote
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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Oxonhutch
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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.
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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
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