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

On Sunday, June 11, 2023 at 8:50:10 PM UTC+10, The Natural Philosopher wrote:
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:

<snip>

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.

Toyota used roller bearings in it\'s car engines, which did rotate a lot faster than regular car engines. Toyota did start off as a motor cycle manufacturer.

I got told about this in Southampton in 1974 by one of the other chemistry post-docs who was mad about cars., and drove a very fast Toyota. It might have been a 2000 GT but probably wasn\'t - post-docs didn\'t get much money

--
Bill Sloman, Sydney
 
tirsdag den 13. juni 2023 kl. 10.33.54 UTC+2 skrev Anthony William Sloman:
On Sunday, June 11, 2023 at 8:50:10 PM UTC+10, The Natural Philosopher wrote:
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:
snip
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.
Toyota used roller bearings in it\'s car engines, which did rotate a lot faster than regular car engines. Toyota did start off as a motor cycle manufacturer.

they started out making looms, they never made motorcycles

> I got told about this in Southampton in 1974 by one of the other chemistry post-docs who was mad about cars., and drove a very fast Toyota. It might have been a 2000 GT but probably wasn\'t - post-docs didn\'t get much money

unlikely, only a little more that 300 2000GT were made and they cost more than a Jaguar E-type
 
On Tuesday, June 13, 2023 at 9:36:13 PM UTC+10, Lasse Langwadt Christensen wrote:
tirsdag den 13. juni 2023 kl. 10.33.54 UTC+2 skrev Anthony William Sloman:
On Sunday, June 11, 2023 at 8:50:10 PM UTC+10, The Natural Philosopher wrote:
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:
snip
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.
Toyota used roller bearings in it\'s car engines, which did rotate a lot faster than regular car engines. Toyota did start off as a motor cycle manufacturer.
they started out making looms, they never made motorcycles
I got told about this in Southampton in 1974 by one of the other chemistry post-docs who was mad about cars., and drove a very fast Toyota. It might have been a 2000 GT but probably wasn\'t - post-docs didn\'t get much money
unlikely, only a little more that 300 2000GT were made and they cost more than a Jaguar E-type

I\'m confident about the roller-bearing car engine. less confident about the make of car. It was fifty years ago.

--
Bil Sloman, Sydney
 
On Tuesday, June 13, 2023 at 9:36:13 PM UTC+10, Lasse Langwadt Christensen wrote:
tirsdag den 13. juni 2023 kl. 10.33.54 UTC+2 skrev Anthony William Sloman:
On Sunday, June 11, 2023 at 8:50:10 PM UTC+10, The Natural Philosopher wrote:
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:
snip
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. \"

Toyota used roller bearings in it\'s car engines, which did rotate a lot faster than regular car engines. Toyota did start off as a motor cycle manufacturer.
they started out making looms, they never made motorcycles,

Oops. That suggests that I\'ve confused Honda and Toyota. Googling Honda - which did start out making motorcycles - suggests that I might have been thinking of an S600 or an S800, both which had very fast spinning engines.\'

> > I got told about this in Southampton in 1974 by one of the other chemistry post-docs who was mad about cars, and drove a very fast Japanese machine.

It was fifty years ago., and I was driving a very old Peugeot 404 at the time. Fairly quick, but cheap to insure.

--
Bill Sloman, Sydney
 
On Fri, 19 May 2023 03:51:45 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Fri, 19 May 2023 02:10:50 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:

On Sat, 22 Apr 2023 19:57:28 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On 22 Apr 2023 18:05:07 GMT, rbowman <bowman@montana.com> wrote:

On Sat, 22 Apr 2023 06:38:41 -0700, John Larkin wrote:

On Sat, 22 Apr 2023 06:16:14 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:

On Mon, 03 Apr 2023 21:15:12 +0100, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:

On 3 Apr 2023 19:29:01 GMT, rbowman <bowman@montana.com> wrote:

On Mon, 03 Apr 2023 11:14:28 -0700, John Larkin wrote:


We were in the Castro yesterday and I didn\'t see many dogs. There
are other neighborhoods where I think it is a felony to walk around
without a dog or a kid.

Around here a Subaru Forester and a Labrador with a red kerchief are
issued at birth. I like dogs but I wish their owners were bright
enough to realize you\'re supposed to take the little bags of shit
with you. The cartoon instructions at the trailheads omit that part.

We have Teslas and custom bred-to-order labridoodles. The Brat is
unusual in adopting SPCA mutts.

Everyone here that walks a dog carries poop bags and uses them.

If nobody\'s looking, I fail to see the point in picking it up.

Poop smeared everywhere appeals to you?

Probably so. It\'s a common syndrome.


Another example of why a libertarian society is a pipe dream; it requires
adults.

It varies by culture. The Russians don\'t understand register lines or
elevators. Everybody just rushes and pushes.

I like everyone else queueing nicely, it means I can get served first.

There are some Youtube videos of North Koreans reaction to the USA.
They are shocked by how nice we are, how we smile and help strangers
and hug our kids in public.

A sign of weakness.

That\'s as loathsome as it is wrong. The norks aren\'t doing very well;
the Danes are.

Being nice to someone gains you nothing, chances are they won\'t be nice back.
 
On Sun, 21 May 2023 15:25:05 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Sun, 21 May 2023 05:04:50 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:

On Tue, 25 Apr 2023 21:29:36 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Tue, 25 Apr 2023 20:30:03 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:

On Wed, 12 Apr 2023 05:34:17 +0100, John Larkin <jjlarkin@highlandtechnology.com> wrote:

On Wed, 12 Apr 2023 03:12:45 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:

What\'s with the heavy breathing at the start?

Some of us need oxygen when we ski hard at 8200 feet with a camera in
one hand and two poles in the other.

You were stood still!

You might notice that I didn\'t start filming at the top of the
mountain.

Just how long does it take to get your breath back?

Way less time than you take to brood on lame snarky replies. That
ratio is about 900:1.

Isn\'t there a newsgroup just for skill-free flamers?

If you want me to be more skilled at it you need to teach by example.
 
On Mon, 22 May 2023 12:57:50 +0100, Carlos E.R. <robin_listas@es.invalid> wrote:

On 2023-03-30 18:17, Max Demian wrote:
On 30/03/2023 14:10, Commander Kinsey wrote:
On Sat, 18 Mar 2023 13:48:56 -0000, Max Demian
max_demian@bigfoot.com> wrote:

there has to be an amplifier and isolation between the outlets

You can buy an amplifier with multiple outputs.

Someone has to make sure the amplifier can cope with short circuits in
the output.
s
in case someone shorts the output or feeds DC into the wire. (Some TVs
provide DC, 5 or 12V for a masthead amplifier. It won\'t be needed, but
the option to turn it on and off will be buried in the menus somewhere.)

NEver known if such weirdness. I just feed the amp with power where
it is instead of running it through the aerial wire.

It doesn\'t matter what you want to do. The fact is, some TVs and PVRs
have the facility and the option could be on by accident or default.

I confirm this.

It is the standard here, if you have your own antena, to feed power to
the antena amplifier via the aerial coax cable. It can be done by
inserting a special power supply in the cable when it enters the house
(a capacitor isolates the DC on the inner side), or the TV set does that.

Here, we don\'t need amps. We have decent transmitters in the first place. Or TVs designed to amplify inside them instead of farming it out to another box.

What I do not know is what would happen to other TV sets in the same cable.

You can\'t expect Mrs Miggins of flat 4 to understand such
technicalities. That\'s why it\'s easier for each user to have his/her own
aerial. Cooperation required organisation.

Yep.

She doesn\'t need to understand, her TV does.
 
On 17/06/2023 23:03, Commander Kinsey wrote:
On Mon, 22 May 2023 12:57:50 +0100, Carlos E.R.
robin_listas@es.invalid> wrote:

It is the standard here, if you have your own antena, to feed power to
the antena amplifier via the aerial coax cable. It can be done by
inserting a special power supply in the cable when it enters the house
(a capacitor isolates the DC on the inner side), or the TV set does that.

Here, we don\'t need amps.  We have decent transmitters in the first
place.  Or TVs designed to amplify inside them instead of farming it out
to another box.

You probably would need an amp if the signal is split between nine TVs.
And you still have to stop idiots from shorting out their aerial
sockets, accidentally or deliberately.

--
Max Demian
 
On 18/06/2023 11:52, Max Demian wrote:
On 17/06/2023 23:03, Commander Kinsey wrote:
On Mon, 22 May 2023 12:57:50 +0100, Carlos E.R.
robin_listas@es.invalid> wrote:

It is the standard here, if you have your own antena, to feed power to
the antena amplifier via the aerial coax cable. It can be done by
inserting a special power supply in the cable when it enters the house
(a capacitor isolates the DC on the inner side), or the TV set does
that.

Here, we don\'t need amps.  We have decent transmitters in the first
place.  Or TVs designed to amplify inside them instead of farming it
out to another box.

You probably would need an amp if the signal is split between nine TVs.
And you still have to stop idiots from shorting out their aerial
sockets, accidentally or deliberately.
Yep. less amplification, than buffering for distribution purposes.
I have 9 wall sockets in the house.
Labgear unit sorts it all out

https://labgear.co.uk/product-categories/signal-amplifiers/tv-radio-boosters-distribution-amps/2-input-8-full-output-distribution-amplifier/

--
\"What do you think about Gay Marriage?\"
\"I don\'t.\"
\"Don\'t what?\"
\"Think about Gay Marriage.\"
 
On Sun, 18 Jun 2023 11:52:56 +0100, Max Dumbian, the REAL dumb, notorious,
troll-feeding senile idiot, blathered again:


You probably would need an amp if the signal is split between nine TVs.
And you still have to stop idiots from shorting out their aerial
sockets, accidentally or deliberately.

You troll-feeding sick senile SHITHEAD still need to stop sucking the
unwashed Scottish wanker\'s cock on every occasion, you totally fucked up
demented senile cretin!

--
Max Dumb having another senile moment:
\"It\'s the consistency of the shit that counts. Sometimes I don\'t need to
wipe, but I have to do so to tell. Also humans have buttocks to get
smeared due to our bipedalism.\"
MID: <6vydnWiYDoV1VUrDnZ2dnUU78QednZ2d@brightview.co.uk>

And yet another senile moment:
\"A fawn bowl will show piss a lot less than a white one.\"
MID: <tv1of3$1v4qg$1@dont-email.me>
 
On Mon, 22 May 2023 13:04:01 +0100, Carlos E.R. <robin_listas@es.invalid> wrote:

On 2023-05-19 03:02, Commander Kinsey wrote:
On Sun, 23 Apr 2023 02:30:32 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Thu, 06 Apr 2023 12:17:02 -0400, Joe Gwinn <joegwinn@comcast.net> wrote:
On Wed, 05 Apr 2023 21:15:32 -0700, John Larkin <jlarkin@highlandSNIPMEtechnology.com> wrote:
On Wed, 29 Mar 2023 13:49:33 -0400, Joe Gwinn <joegwinn@comcast.net> wrote:
On Wed, 29 Mar 2023 10:13:39 -0700, John Larkin <jlarkin@highlandSNIPMEtechnology.com> wrote:

If you drive a car on private property, you don\'t have to wear a seat
belt, or obey a speed limit, or have a drivers\' license.

Cars could be programmed to not go over 35 MPH if the driver isn\'t
using his seat belt. Car makers should do that to avoid liability for
injury and death.

The equivalent was tried in the 1970s, with seat belts. There were
lots of malfunctions and stranded motorists.

Technology has advanced in the last 50 years.

But actual reliability has not improved at all, partly because it\'s
all software these days, but also because most cars are sold a bit too
soon in their development process, letting customer do the early field
testing.

Cars are vastly more reliable than they were 50 years ago. I don\'t
suppose you remember filing and gapping points, replacing fouled spark
plugs,

I\'ve used cars as old as 1988, and every time I\'ve tried replacing spark
plugs it didn\'t help. I guess that is recent enough so they don\'t foul
up (even with carburettors).

replacing oil and filter every few thousand miles,

I never replace either of those. I\'ve run cars for 100K miles without
doing so.

I wondered who was the owner of this car. Now I know: it is you!

https://youtu.be/GjwNoLyr3SM?t=11

That wouldn\'t flow properly, and the warning light would come on.
 
On Mon, 22 May 2023 14:38:26 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Fri, 19 May 2023 02:02:53 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:

On Sun, 23 Apr 2023 02:30:32 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Thu, 06 Apr 2023 12:17:02 -0400, Joe Gwinn <joegwinn@comcast.net
wrote:

On Wed, 05 Apr 2023 21:15:32 -0700, John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote:

On Wed, 29 Mar 2023 13:49:33 -0400, Joe Gwinn <joegwinn@comcast.net
wrote:

On Wed, 29 Mar 2023 10:13:39 -0700, John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote:

If you drive a car on private property, you don\'t have to wear a seat
belt, or obey a speed limit, or have a drivers\' license.

Cars could be programmed to not go over 35 MPH if the driver isn\'t
using his seat belt. Car makers should do that to avoid liability for
injury and death.

The equivalent was tried in the 1970s, with seat belts. There were
lots of malfunctions and stranded motorists.

Technology has advanced in the last 50 years.

But actual reliability has not improved at all, partly because it\'s
all software these days, but also because most cars are sold a bit too
soon in their development process, letting customer do the early field
testing.

Cars are vastly more reliable than they were 50 years ago. I don\'t
suppose you remember filing and gapping points, replacing fouled spark
plugs,

I\'ve used cars as old as 1988, and every time I\'ve tried replacing spark plugs it didn\'t help. I guess that is recent enough so they don\'t foul up (even with carburettors).

Leaded gas fouled plugs,

Oh, I thought lead was good apart from the alledged cancer.

> and electronic ignitions make lots of millijoules.

Wouldn\'t that make it worse?

replacing oil and filter every few thousand miles,

I never replace either of those. I\'ve run cars for 100K miles without doing so.

My dealer does it in my annual service. It does start to look dirty by
then.

I don\'t service a car.

fixing flats,

What? Tyres still break, that hasn\'t changed.

I\'ve worn out tires on my 2008 Audi but never had a flat.

You must not drive in places people drop nails. Builders are very clumsy.

I did have
to replace the silly electronic pressure sensors; the batteries
eventually die.

Or just use your eyeballs.

topping off the battery,

I\'m not old enough for that, but my current car runs the battery flat in 4 hours. French electrics, probably the alarm, which is impossible to access.

things breaking.

They still do, but I used to scrap a car at 11 years, my current car is 21 years old and I\'m not considering scrapping for quite a few years yet, even though it\'s French.

I take my car in once a year for service.

I see no reason to fix what isn\'t broken.

They check everything so prevent problems on the road. It\'s worth
fixing things on a predictable time frame.

I prefer not to spend money before I have to, and I may never have to.

> I\'ve never had a breakdown.

How old/mileage a car do you drive?

It has never failed to go
and never had a flat tire. The headlights are original, 2008.

My 2002 headlights are pitiful, very smogged up inside, for some reason it still passes the MOT. I had a previous car fail on that. They\'re less than half as bright as they should be. I\'ve taken to using full beam but adjusting it down a bit. Not sure why that works, since they\'re the same wattage.

I\'d have expected my gas discharge lights

Are those the ones which are way brighter than normal bulbs, and get away with it because the input power is the same? Thanks for dazzling me, you\'re asking for a collision.

with electronic drives to
break by now, but they haven\'t. The covers haven\'t fogged up, which I
see a lot on some cars.

Several of the small lights, incandescents, have failed, but I
replaced all of them at once so they should be good for several years.

You replaced bulbs which weren\'t broken? ROFL!

> Most are LEDs now.

My car is too old for that.
 
On Sunday, June 18, 2023 at 8:02:14 AM UTC+10, Commander Kinsey wrote:
On Sun, 21 May 2023 15:25:05 +0100, John Larkin <jla...@highlandsnipmetechnology.com> wrote:
On Sun, 21 May 2023 05:04:50 +0100, \"Commander Kinsey\" <C...@nospam.com> wrote:
On Tue, 25 Apr 2023 21:29:36 +0100, John Larkin <jla...@highlandsnipmetechnology.com> wrote:
On Tue, 25 Apr 2023 20:30:03 +0100, \"Commander Kinsey\" <C...@nospam.com> wrote:
On Wed, 12 Apr 2023 05:34:17 +0100, John Larkin <jjla...@highlandtechnology.com> wrote:
On Wed, 12 Apr 2023 03:12:45 +0100, \"Commander Kinsey\" <C...@nospam.com> wrote:

<snip>

Way less time than you take to brood on lame snarky replies. That ratio is about 900:1.

Isn\'t there a newsgroup just for skill-free flamers?

If you want me to be more skilled at it you need to teach by example.

That\'s Commander Kinsey assuming that he can learn. Over the past year or so he has made it blindly obvious that he can\'t .

He\'s sea- green ineducable, and seems to take pride in being particularly obtuse, You can take a Scottish wanker to water, but you can\'t make him think - much better hold him under until he stops being a pest.

--
Bill Sloman, Sydney
 
On Wed, 10 May 2023 23:07:24 +0100, 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:
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.

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.

Clearly not. https://youtu.be/p5d3NGraRqA

Talking of big trains.... https://youtu.be/fqOLoFkV5js
 
On Wed, 10 May 2023 22:04:54 +0100, Carlos E.R. <robin_listas@es.invalid> wrote:

On 2023-05-10 22:31, Bob F wrote:
On 3/12/2023 7:43 PM, 😎 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.

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.

Friction isn\'t just related to surface area, but also material.
 
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.
 
On 2023-06-21, Commander Kinsey <CK1@nospam.com> wrote:
On Wed, 10 May 2023 22:04:54 +0100, Carlos E.R. <robin_listas@es.invalid> wrote:

On 2023-05-10 22:31, Bob F wrote:
On 3/12/2023 7:43 PM, 😎 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.

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.

Friction isn\'t just related to surface area, but also material.

Friction just isn\'t related to surface area, but instead material.

--
Jasen.
🇺🇦 Слава Україні
 
On Wed, 21 Jun 2023 06:57:13 -0000 (UTC), Jasen Betts, the absolutely brain
dead, troll-feeding senile asshole, blathered again:


Friction isn\'t just related to surface area, but also material.

Friction just isn\'t related to surface area, but instead material.

Trolling isn\'t just related to the troll, but also to the idiotic
troll-feeding senile ASSHOLES that keep playing the troll\'s game, you
troll-feeding senile shithead.
 
On Wed, 21 Jun 2023 06:57:13 +0000, Jasen Betts wrote:

On 2023-06-21, Commander Kinsey <CK1@nospam.com> wrote:
On Wed, 10 May 2023 22:04:54 +0100, Carlos E.R.
robin_listas@es.invalid> wrote:

On 2023-05-10 22:31, Bob F wrote:
On 3/12/2023 7:43 PM, 😎 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.

Momentum not 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.

Friction isn\'t just related to surface area, but also material.

Friction just isn\'t related to surface area, but instead material.
 
On 21/06/2023 10:14, jon wrote:

Momentum not Inertia.

Same thing



--
In theory, there is no difference between theory and practice.
In practice, there is.
-- Yogi Berra
 

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