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On Wed, 10 May 2023 09:56:44 +0100, Xeno <xenolith@optusnet.com.au> wrote:
On 2/3/2023 2:05 am, Commander Kinsey wrote:
On Sat, 18 Feb 2023 20:10:09 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
On 2023-02-18 14:09, The Natural Philosopher wrote:
On 18/02/2023 12:37, Max Demian wrote:
On 17/02/2023 21:04, Commander Kinsey wrote:
On Wed, 15 Feb 2023 16:57:19 -0000, Max Demian
max_demian@bigfoot.com> wrote:
On 15/02/2023 14:48, Commander Kinsey wrote:
Mind you the whole idea of metal wheels on metal tracks is crazy.
If I
drive my car with bald tyres, I\'m breaking the law.
Works though; provided there are no \"leaves on the line\".
(Something to with the friction between similar metals I think.)
There\'s fuck all friction, which is why they want the cars to wait
for the train at a level crossing, and not the other way round. And
why the new tunnel the Germans are building couldn\'t go right
underground and had to be installed on the bottom of the ocean,
because the pathetic toy trains couldn\'t handle the incline.
This is
the 21st century, we have cars. Public transport is for chavs.
If there were no friction between train wheels and track acceleration
and braking wouldn\'t happen.
The reason railway tracks are so level is so that the engines can
have
the minimum power to pull the train. Very steep inclines would
require
extra locomotives to be put on to get up the hills.
Steam locos were not rated in horsepower, but \'tractive effort\' . How
many tons of pull they could generate before the wheels slipped.
That\'s why they had a lot of driving wheels - at least four,
generally 6
 and up to 8.
I suppose this assumes that the tracks do not bend, vertically or
horizontally, or some of the wheels could loose pressure, as there are
no springs on the loco wheels (but the wagons do have them, so there
must be imperfections on the tracks).
Why were they never made of something more grippy than highly polished
steel?
That settles it - you have never studied engineering - in any form.
I studied engineering as part of my combined degree. Electrical and
building construction.
We put grippy wheels on cars, we could put them on trains too.
Dutch has the phrase \"Alle hans op dak\" which literally means \"All hens on the roof\" but is actually the English command \"All hands on deck\" transcribed more or less phonetically. There\'s a lot of borrowing.
Isn\'t there something about more friction between similar metals? Clock
mechanisms usually have steel spindles in brass bearings.
On Fri, 9 Jun 2023 08:10:54 -0700 (PDT), Anthony William Sloman
bill....@ieee.org> wrote:
Dutch has the phrase \"Alle hans op dak\" which literally means \"All hens on the roof\" but is actually the English command \"All hands on deck\" transcribed more or less phonetically. There\'s a lot of borrowing.
Bet you it\'s the other way around, for \'deck\' anyways.
On 10/06/2023 08:46, Commander Kinsey wrote:
On Wed, 10 May 2023 09:56:44 +0100, Xeno <xenolith@optusnet.com.au
wrote:
On 2/3/2023 2:05 am, Commander Kinsey wrote:
On Sat, 18 Feb 2023 20:10:09 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
On 2023-02-18 14:09, The Natural Philosopher wrote:
On 18/02/2023 12:37, Max Demian wrote:
On 17/02/2023 21:04, Commander Kinsey wrote:
On Wed, 15 Feb 2023 16:57:19 -0000, Max Demian
max_demian@bigfoot.com> wrote:
On 15/02/2023 14:48, Commander Kinsey wrote:
Mind you the whole idea of metal wheels on metal tracks is
crazy.
If I
drive my car with bald tyres, I\'m breaking the law.
Works though; provided there are no \"leaves on the line\".
(Something to with the friction between similar metals I think.)
There\'s fuck all friction, which is why they want the cars to wait
for the train at a level crossing, and not the other way round.
And
why the new tunnel the Germans are building couldn\'t go right
underground and had to be installed on the bottom of the ocean,
because the pathetic toy trains couldn\'t handle the incline.
This is
the 21st century, we have cars. Public transport is for chavs.
If there were no friction between train wheels and track
acceleration
and braking wouldn\'t happen.
The reason railway tracks are so level is so that the engines can
have
the minimum power to pull the train. Very steep inclines would
require
extra locomotives to be put on to get up the hills.
Steam locos were not rated in horsepower, but \'tractive effort\' .
How
many tons of pull they could generate before the wheels slipped.
That\'s why they had a lot of driving wheels - at least four,
generally 6
and up to 8.
I suppose this assumes that the tracks do not bend, vertically or
horizontally, or some of the wheels could loose pressure, as there
are
no springs on the loco wheels (but the wagons do have them, so there
must be imperfections on the tracks).
Why were they never made of something more grippy than highly polished
steel?
That settles it - you have never studied engineering - in any form.
I studied engineering as part of my combined degree. Electrical and
building construction.
We put grippy wheels on cars, we could put them on trains too.
Isn\'t there something about more friction between similar metals? Clock
mechanisms usually have steel spindles in brass bearings.
[...]
We put grippy wheels on cars, we could put them on trains too.
On Wed, 10 May 2023 10:10:23 +0100, Xeno <xenolith@optusnet.com.au> wrote:
[...]
Stick train wheels on your car, run it on rails, learn the difference.
Rolling resistance is what you need to note here.
We don\'t complain about rolling resistance on car tyres. The benefits outweigh the losses.
[...]
BTW, notice those Hi-Rail vehicles aren\'t dragging lots of wagons behind
them. Have a think about that but watch out for the wood smoke.
Presumably they could.
BTW, we in the land down under are one step ahead of you. Where we need
to run a road vehicle on rails, boy, do we have it covered!
https://ariesrail.com.au/gallery/
If it\'s that brilliant, why isn\'t every country doing it?
Sure, get a \"grippy\" material that can hold >100 tons (>200,000 pounds)
in a single car with 4 (or even 6) axles, and maybe you have an idea.
[\"Followup-To:\" header set to sci.electronics.design.]
On 2023-06-10, Commander Kinsey wrote:
On Wed, 10 May 2023 10:10:23 +0100, Xeno <xenolith@optusnet.com.au> wrote:
[...]
Stick train wheels on your car, run it on rails, learn the difference.
Rolling resistance is what you need to note here.
We don\'t complain about rolling resistance on car tyres. The benefits outweigh the losses.
Road vehicles also don\'t weigh in at 100 tons, or try dragging 100x cars
(at 100 tons each) behind a couple of tractors.
Most are...
https://aspenequipment.com/hi-rail-truck/
https://hirail-wise.com/productcategories/hirail/
On Sat, 10 Jun 2023 20:23:24 +1000, Max Demian <max_demian@bigfoot.com
wrote:
On 10/06/2023 08:46, Commander Kinsey wrote:
 We put grippy wheels on cars, we could put them on trains too.
Have a look at the grippy wheels on big trucks. Just not feasilbe on
trains.
Isn\'t there something about more friction between similar metals?
Clock mechanisms usually have steel spindles in brass bearings.
Clocks are very different to trains. Rain wheels have immense loads on
them.
And the other point is, the load on the bearing is deeply significant,On 10/06/2023 17:59, Rod Speed wrote:
On Sat, 10 Jun 2023 20:23:24 +1000, Max Demian
max_demian@bigfoot.com> wrote:
On 10/06/2023 08:46, Commander Kinsey wrote:
 We put grippy wheels on cars, we could put them on trains too.
Have a look at the grippy wheels on big trucks. Just not feasilbe on
trains.
Isn\'t there something about more friction between similar metals?
Clock mechanisms usually have steel spindles in brass bearings.
Clocks are very different to trains. Rain wheels have immense loads on
them.
The point is you want *minimum* friction in a clock (or any journal)
bearing.
And the other point is, the load on the bearing is deeply significant,
which is why (almost*) no piston engine uses roller or ball bearings
routinely on a crankshaft.
*I think I recall one example on a small motorcycle engine, but I could
be wrong.
On 11/06/2023 11:40, Max Demian wrote:
On 10/06/2023 17:59, Rod Speed wrote:
On Sat, 10 Jun 2023 20:23:24 +1000, Max Demian
max_d...@bigfoot.com> wrote:
On 10/06/2023 08:46, Commander Kinsey wrote:
We put grippy wheels on cars, we could put them on trains too.
Have a look at the grippy wheels on big trucks. Just not feasilbe on
trains.
Isn\'t there something about more friction between similar metals?
Clock mechanisms usually have steel spindles in brass bearings.
Clocks are very different to trains. Rain wheels have immense loads on
them.
The point is you want *minimum* friction in a clock (or any journal)
bearing.
And the other point is, the load on the bearing is deeply significant,
which is why (almost*) no piston engine uses roller or ball bearings
routinely on a crankshaft.
*I think I recall one example on a small motorcycle engine, but I could
be wrong.
On 18/2/2023 11:37 pm, Max Demian wrote:
On 17/02/2023 21:04, Commander Kinsey wrote:
On Wed, 15 Feb 2023 16:57:19 -0000, Max Demian
max_demian@bigfoot.com> wrote:
On 15/02/2023 14:48, Commander Kinsey wrote:
Mind you the whole idea of metal wheels on metal tracks is crazy. If I
drive my car with bald tyres, I\'m breaking the law.
Works though; provided there are no \"leaves on the line\".
(Something to with the friction between similar metals I think.)
There\'s fuck all friction, which is why they want the cars to wait for
the train at a level crossing, and not the other way round. And why
the new tunnel the Germans are building couldn\'t go right underground
and had to be installed on the bottom of the ocean, because the
pathetic toy trains couldn\'t handle the incline. This is the 21st
century, we have cars. Public transport is for chavs.
If there were no friction between train wheels and track acceleration
and braking wouldn\'t happen.
The small contact area and the great mass of a train is what does the
trick.
On 5/11/2023 4:40 AM, Max Demian wrote:
On 10/05/2023 09:48, Xeno wrote:
On 2/3/2023 2:07 am, Commander Kinsey wrote:
ROFL, there\'s still people wearing masks here. I went to hospital
with a suspected broken thumb and everyone had a mask on. They
glared at me sternly when I refused.
Why is it I can envisage you doing just that? If people want me to
wear a mask, I oblige and I keep one in my pocket just for that
purpose. It\'s called manners. You may not have heard of such a concept
where you come from.
\"Manners\" in this context is just a way to bully people. Some \"manners\"
may be devised just for this purpose.
It is a public health issue. Manners just means cooperating with the
health authorities to protect everyone, especially people with extreme
risks from covid, who are much more likely to be found in medical
facilities.
Anyone refusing to cooperate with such rules is just a self centered,
know it all fool and an asshole.
On 11/05/2023 12:40, Max Demian wrote:
On 10/05/2023 09:48, Xeno wrote:
On 2/3/2023 2:07 am, Commander Kinsey wrote:
ROFL, there\'s still people wearing masks here. I went to hospital
with a suspected broken thumb and everyone had a mask on. They
glared at me sternly when I refused.
Why is it I can envisage you doing just that? If people want me to
wear a mask, I oblige and I keep one in my pocket just for that
purpose. It\'s called manners. You may not have heard of such a concept
where you come from.
\"Manners\" in this context is just a way to bully people. Some \"manners\"
may be devised just for this purpose.
There are things making a fuss about, and there are face masks. I am not
convinced they have or had any efficacy whatsoever.
But I carried a few around to slap on for appearances sake