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

[Xeno]

On 17/2/2023 1:35 am, Commander Kinsey wrote:

On Sun, 12 Feb 2023 14:27:41 -0000, Max Demian <max_demian@bigfoot.com
wrote:

On 12/02/2023 11:54, The Natural Philosopher wrote:
On 11/02/2023 18:30, Carlos E.R. wrote:
On 2023-02-11 13:23, Commander Kinsey wrote:
On Sat, 11 Feb 2023 11:58:23 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
On 2023-02-11 10:00, Commander Kinsey wrote:
On Sat, 11 Feb 2023 08:48:06 -0000, Colin Bignell
cpb@bignellremovethis.me.uk> wrote:
On 11/02/2023 08:16, Commander Kinsey wrote:


But reverse screws do exist.

They shouldn\'t.

Disassemble a house fan, and you will see one such reverse bolt, and
understand why they exist


Reverse screws are used in traditional taps to lift the washer assembly
off the seating to make it seem like you are unscrewing a traditional
tap when the head of the tap is not actually moving upward.

Reverse screws are used on steering links so you can adjust the
effective length by turning the link rod.

Reverse screws are used on quadcopter rotor shafts for two of the motors
that are turning  clockwise
etc etc.

In short there are dozens of places you need a reverse screw,

And sports cars with knock off hubs and wire wheels where a left hand
thread is used on one side (forget which) so it doesn\'t some undone if
the cap (or whatever) rubs against something.

Funny how most cars don\'t seem to need that.

And the pressure reducers used on LPG cylinders: propane is the opposite
way to butane so you can\'t connect the wrong one.

What\'s wrong with different sized connectors?

Thinking you\'re tightening a gas pipe and you\'re actually undoing it is
dangerous.

The people who know what they are doing don\'t seem to have an issue.
--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 17/2/2023 3:05 am, Dan Purgert wrote:

[\"Followup-To:\" header set to sci.electronics.design.]
On 2023-02-16, Commander Kinsey wrote:
On Sun, 12 Feb 2023 14:27:41 -0000, Max Demian <max_demian@bigfoot.com> wrote:
[...]
And sports cars with knock off hubs and wire wheels where a left hand
thread is used on one side (forget which) so it doesn\'t some undone if
the cap (or whatever) rubs against something.

Funny how most cars don\'t seem to need that.

Different design. The lug nuts on modern cars are part of the rotating
hub/brake assembly behind the wheel itself; and so there are no (or very
few) forces trying to unscrew the nuts from the studs.

The wheel Max describes is more like if you simply use a (stationary)
bolt as the axle for a wheel -- a lot like the training wheels on a
child\'s bike. The rotating wheel\'s friction against a (single) nut can
cause the nut to become unscrewed.


And the pressure reducers used on LPG cylinders: propane is the opposite
way to butane so you can\'t connect the wrong one.

What\'s wrong with different sized connectors?

Thinking you\'re tightening a gas pipe and you\'re actually undoing it
is dangerous.

Thinking you\'re connecting a regulator to a nonflammable gas is ALSO
dangerous (significantly moreso, in fact). Which is why the thread
forms are standardized that nonflammable gasses are right-hand, and
flammable are left-hand. Although, that might \"only\" be in industrial
applications; I know they\'re backwards for those boring little
hand-torch bottles you can buy at a hardware store (i.e. the little
oxygen bottles are left-handed, whereas the propane / MAP tanks are
right-handed).

Don\'t forget that reverse-threaded nuts used in gas (and other)
applications have a groove cut around the circumference of the points at
about the midline as an indicator. For example, this hose-barb adapter:

https://lenzinc.com/sites/default/files/WL%20A.jpg


As I said, the people who know don\'t have an issue.

Maybe it\'s a case of the people who don\'t should stay well away from
things they know naught about.


--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 16/2/2023 1:48 am, Commander Kinsey wrote:

On Sun, 12 Feb 2023 13:33:03 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:

On 2023-02-12 01:54, NY wrote:
On 11/02/2023 15:45, Commander Kinsey wrote:
e.g. UK railways signals were always horizontal for stop, but in the
days of broken cables they moved from down=go (lower quadrant) to
up=go
(upper quadrant)...as this required less weight to unbalance them to
failsafe.

Why are there four lights?  They add blue I think.

The lights are (and I might have got the order upside down)

red
yellow
green
yellow

Red = Stop
Green = Go
Single Yellow = next signal is red, so prepare to stop at it
Double Yellow = next but one signal is red (used where linespeed is
higher and stopping distances are greater than spacing of signal posts)

That last one is interesting. The other three match what I see here
(Spain), the last I don\'t know. Could be.

Maybe it\'s for shit drivers.

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.

Metal wheels on metal tracks equals reduced friction (rolling
resistance). You sure don\'t sound like you\'ve ever done any engineering
since most engineering niceties have you knackered!

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 18/2/2023 8:04 am, 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:
On Sun, 12 Feb 2023 13:33:03 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
On 2023-02-12 01:54, NY wrote:
On 11/02/2023 15:45, Commander Kinsey wrote:

e.g. UK railways signals were always horizontal for stop, but in the
days of broken cables they moved from down=go (lower quadrant) to
up=go
(upper quadrant)...as this required less weight to unbalance them to
failsafe.

Why are there four lights?  They add blue I think.

The lights are (and I might have got the order upside down)

red
yellow
green
yellow

Red = Stop
Green = Go
Single Yellow = next signal is red, so prepare to stop at it
Double Yellow = next but one signal is red (used where linespeed is
higher and stopping distances are greater than spacing of signal
posts)

That last one is interesting. The other three match what I see here
(Spain), the last I don\'t know. Could be.

Maybe it\'s for shit drivers.

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

You\'ve noticed! I had thought you were living in the 16th century.

> cars.  Public transport is for chavs.

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

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.

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.

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 19/2/2023 12:09 am, 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.

At a given slope even  the loco alone cant get up it which is where rack
and pinion railways come in.

Ever thought about why roads tend to go over hills and railways tend to
go straight through? It\'s all about efficiency and is one of the reasons
why motorways, freeways and the like tend to also run the most level
path practicable.


--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 19/2/2023 7:10 am, Carlos E.R. 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).

Loco wheels most certainly do have springs. Just because you can\'t see
them doesn\'nt mean they aren\'t there - somewhere. Without springs you
would be cracking wheels, axles and frames all too frequently. Also,
without springs, you wouldn\'t be able to keep the loco on the track.

For your edification;

http://dougkerr.net/Pumpkin/articles/Spring_Equalization.pdf

At a given slope even  the loco alone cant get up it which is where
rack and pinion railways come in.

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 19/2/2023 11:38 pm, The Natural Philosopher wrote:

On 18/02/2023 20:10, Carlos E.R. 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).

? I think there were springs on the driving wheels actually. Really big
locos were more the province of the USA with its enormously long
straight tracks

https://en.wikipedia.org/wiki/Steam_locomotive_components

shows that driving wheels are sprung, though possibly not independently.

The driving axles on locos tend to be *equalised*.

http://dougkerr.net/Pumpkin/articles/Spring_Equalization.pdf

In practice the railroads were built to run steam trains with up to 8
close spaced driving wheels, and if that made life difficult, tough.

The big 8 wheelers were more suited to the USA with bigger steeper
inclines but seldom tight curves.

Depends on where in the USA you were. Otherwise these wouldn\'t have been
needed.

https://en.wikipedia.org/wiki/Climax_locomotive

https://en.wikipedia.org/wiki/Shay_locomotive

Also for use in more cramped conditions twin sets of drive wheels and
cylinders could be used.

Curiously, others than yourself thought about this at the time

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 2/3/2023 2:07 am, Commander Kinsey wrote:

On Sun, 19 Feb 2023 18:37:18 -0000, rbowman <bowman@montana.com> wrote:

On Sun, 19 Feb 2023 12:38:00 +0000, The Natural Philosopher wrote:


In practice the railroads were built to run steam trains with up to 8
close spaced driving wheels, and if that made life difficult, tough.

The big 8 wheelers were more suited to the USA with bigger steeper
inclines but seldom tight curves.

https://en.wikipedia.org/wiki/Geared_steam_locomotive

https://fortmissoulamuseum.org/wp-content/uploads/2019/11/Brief-History-
of-Engine-7.pdf

The Mount Ranier museum has a working Willamette but they shut down
during
the covid panic.

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.

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Peeler]

On Wed, 10 May 2023 18:25:55 +1000, Xeno, another brainless, troll-feeding,
senile Australian idiot, blathered:

Metal wheels on metal tracks equals reduced friction (rolling
resistance). You sure don\'t sound like you\'ve ever done any engineering
since most engineering niceties have you knackered!

Having another outbreak of senility, troll-feeding senile asshole? Or why
did you HAVE to revive a 3 months old, dead thread by the trolling Scottish
wanker and attention whore?

 

[Xeno]

On 3/3/2023 7:49 am, Carlos E.R. wrote:

On 2023-03-01 16:07, Commander Kinsey wrote:
On Sun, 19 Feb 2023 18:37:18 -0000, rbowman <bowman@montana.com> wrote:

On Sun, 19 Feb 2023 12:38:00 +0000, The Natural Philosopher wrote:


In practice the railroads were built to run steam trains with up to 8
close spaced driving wheels, and if that made life difficult, tough.

The big 8 wheelers were more suited to the USA with bigger steeper
inclines but seldom tight curves.

https://en.wikipedia.org/wiki/Geared_steam_locomotive

https://fortmissoulamuseum.org/wp-content/uploads/2019/11/Brief-History-
of-Engine-7.pdf

The Mount Ranier museum has a working Willamette but they shut down
during
the covid panic.

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.

It is mandatory here in hospitals.

Pretty much the same here. I was discharged from hospital 2 days ago, my
4th visit in the past 2 years and I, as a patient, was also required to
wear a mask as were *all* staff and visitors. If you refuse, you get
offered the door.

And it is to protect other patients from YOU.

Most assuredly. I wear the mask out of consideration for others.

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 17/4/2023 8:47 pm, Carlos E.R. wrote:

On 2023-03-16 04:37, Commander Kinsey wrote:
On Thu, 02 Mar 2023 20:49:37 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:

On 2023-03-01 16:07, Commander Kinsey wrote:
On Sun, 19 Feb 2023 18:37:18 -0000, rbowman <bowman@montana.com> wrote:

On Sun, 19 Feb 2023 12:38:00 +0000, The Natural Philosopher wrote:


In practice the railroads were built to run steam trains with up to 8
close spaced driving wheels, and if that made life difficult, tough.

The big 8 wheelers were more suited to the USA with bigger steeper
inclines but seldom tight curves.

https://en.wikipedia.org/wiki/Geared_steam_locomotive

https://fortmissoulamuseum.org/wp-content/uploads/2019/11/Brief-History-
of-Engine-7.pdf

The Mount Ranier museum has a working Willamette but they shut down
during
the covid panic.

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.

It is mandatory here in hospitals.

I make fun of snowflakes scared of a bad cold.

And it is to protect other patients from YOU.

Yeah, because masks are magical and only work one way.  Here\'s a tip -
put your mask on backwards, then the virus can\'t get in.


Oh, my, how dumb you are...

I\'d have said *pig ignorant* but dumb will suffice.
--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

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.
--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Xeno]

On 17/3/2023 5:21 am, Commander Kinsey wrote:

On Mon, 13 Mar 2023 05:45:10 -0000, rbowman <bowman@montana.com> wrote:

On Sun, 12 Mar 2023 22:43:31 -0400, 😎 Mighty Wannabe ✅ wrote:

rbowman wrote on 3/12/2023 10:05 PM:
On Mon, 13 Mar 2023 00:30:39 -0000, Commander Kinsey wrote:

On Thu, 02 Mar 2023 03:09:14 -0000, rbowman <bowman@montana.com
wrote:

On Wed, 01 Mar 2023 15:05:31 -0000, Commander Kinsey wrote:


Why were they never made of something more grippy than highly
polished steel?
https://en.wikipedia.org/wiki/Mount_Washington_Cog_Railway
Should be used on all tracks, then perhaps trains could stop in the
distance my car is required to by law.
Do the math. A fully laden coal car weighs about 140 tons. I\'ve never
been bored enough to count cars when I stopped at a crossing but there
are a lot of them. Let\'s say 30 for the sake of argument, 4200 tons
plus the weight of the engines. Let\'s say 4 at 200 tons each. So,
roughly 5000 tons traveling at 50 mph. That\'s quite a bit of kinetic
energy to dump in 300\'.
I can hear snapping axles and see flying wheels.


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.

The reference was to the Mt. Washington Cog Railway. The wheels are for
guidance but the motive power is a rack and pinion.

https://en.wikipedia.org/wiki/Rack_railway

At least on Mt Washington it\'s only the engine and a small passenger car
operating at less than 10 mph. They\'re not feasible for general use.

Surely cogs can go over 10mph.  Your car gearbox is full of them turning
at very high speed.

A sealed environment where clearances are controlled, lubrication is
assured and contaminants excluded, not a problem. Now, think how that
differs from the cogs in a rack railway system. And that\'s just for
starters.

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Peeler]

On Wed, 10 May 2023 18:48:49 +1000, Xeno, another brainless, troll-feeding,
senile Australian idiot, blathered:

Why is it I can envisage you doing just that?

Why is it that I can envisage you getting institutionalized very soon, Beno?
<BG>

 

[Peeler]

On Wed, 10 May 2023 18:56:44 +1000, Xeno, another brainless, troll-feeding,
senile Australian idiot, blathered:


> That settles it - you have never studied engineering - in any form.

What is settled now is that you ARE a miserable troll-feeding senile
ASSHOLE!

 

[Xeno]

On 17/3/2023 5:21 am, Commander Kinsey wrote:

On Mon, 13 Mar 2023 02:43:31 -0000, 😎 Mighty Wannabe ✅ <.> wrote:

rbowman wrote on 3/12/2023 10:05 PM:
On Mon, 13 Mar 2023 00:30:39 -0000, Commander Kinsey wrote:

On Thu, 02 Mar 2023 03:09:14 -0000, rbowman <bowman@montana.com> wrote:

On Wed, 01 Mar 2023 15:05:31 -0000, Commander Kinsey wrote:


Why were they never made of something more grippy than highly
polished
steel?
https://en.wikipedia.org/wiki/Mount_Washington_Cog_Railway
Should be used on all tracks, then perhaps trains could stop in the
distance my car is required to by law.
Do the math. A fully laden coal car weighs about 140 tons. I\'ve never
been
bored enough to count cars when I stopped at a crossing but there are a
lot of them. Let\'s say 30 for the sake of argument, 4200 tons plus the
weight of the engines. Let\'s say 4 at 200 tons each. So, roughly 5000
tons
traveling at 50 mph. That\'s quite a bit of kinetic energy to dump in
300\'.
I can hear snapping axles and see flying wheels.

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.

Then the wheels should be rubber like every other vehicle.  Try driving
your car without tyres.

Stick train wheels on your car, run it on rails, learn the difference.
Rolling resistance is what you need to note here.

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/

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.

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Peeler]

On Wed, 10 May 2023 19:03:55 +1000, Xeno, another brainless, troll-feeding,
senile Australian idiot, blathered:

> A sealed environment

Soon YOU will be in a \"sealed\" environment: in a padded cell! <BG>

 

[Xeno]

On 17/3/2023 5:20 am, Commander Kinsey wrote:

On Mon, 13 Mar 2023 02:05:11 -0000, rbowman <bowman@montana.com> wrote:

On Mon, 13 Mar 2023 00:30:39 -0000, Commander Kinsey wrote:

On Thu, 02 Mar 2023 03:09:14 -0000, rbowman <bowman@montana.com> wrote:

On Wed, 01 Mar 2023 15:05:31 -0000, Commander Kinsey wrote:


Why were they never made of something more grippy than highly polished
steel?

https://en.wikipedia.org/wiki/Mount_Washington_Cog_Railway

Should be used on all tracks, then perhaps trains could stop in the
distance my car is required to by law.

Do the math.

If I did the maths I\'d get a more complete answer.

Nah, there\'d be the smell of woodsmoke and the fire brigade would be called.

A fully laden coal car weighs about 140 tons. I\'ve never been
bored enough to count cars when I stopped at a crossing but there are a
lot of them. Let\'s say 30 for the sake of argument, 4200 tons plus the
weight of the engines. Let\'s say 4 at 200 tons each. So, roughly 5000
tons
traveling at 50 mph. That\'s quite a bit of kinetic energy to dump in
300\'.
I can hear snapping axles and see flying wheels.

But there are many wheels.

A fully laden truck/lorry/whatever you call them over there can\'t stop
as quick as a car, but it can stop in a safe distance.  A train cannot,
it\'s not fit for purpose.  If something unexpected happens, it just
ploughs through it.  Trains are outdated technology and it\'s high time
we got rid of them.  Maybe a maglev can stop quicker?

Ever heard of *friction*? Possibly a new concept for you?

--
Xeno


Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

 

[Peeler]

On Wed, 10 May 2023 19:10:23 +1000, Xeno, another brainless, troll-feeding,
senile Australian idiot, blathered:


> Stick train wheels on your car, run it on rails, learn the difference.

Good advice, senile shithead! LMAO