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Re: Why do circuit breakers go up for on and down for off?

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On Fri, 12 May 2023 14:49:57 +0100, Jasen Betts <usenet@revmaps.no-ip.org> wrote:

> On 2023-05-10, SteveW <steve@walker-family.me.uk> wrote:
>> On 10/05/2023 22:04, Carlos E.R. wrote:
>>> On 2023-05-10 22:31, Bob F wrote:
>>>> On 3/12/2023 7:43 PM, 😎 Mighty Wannabe ✅ wrote:
>>>>> The wheels and the rails are steel. A train can never have enough
>>>>> friction to stop at a short distance. The brakes can lock all the
>>>>> wheels but the train will still move forward due to inertia.
>>>>
>>>> All that need is train wheels made of rubber as hard as steel.
>>>
>>> If you do that, then those wheels will be very low friction and braking
>>> will be as bad as with steel wheels.
>>>
>>> You need something that is soft to increase the contact surface and
>>> grip. You have to choose, one thing or the other. Can't have both.
>>
>> Well you could have a train having steel wheels, but with rubber tyred
>> wheels that could be dropped onto the track during heavy acceleration,
>> heavy braking and for steep hills. But generally, steel wheels work well
>> enough.
>
> If they need extra traction they drop sand on the tracks.

Maybe they should do that when they want to do an emergency stop.  Have some sand dispensers in front of every wheel.

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Re: Why do circuit breakers go up for on and down for off? "Commander Kinsey" <CK1@nospam.com> - 2023-06-21 04:00 +0100

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