Safe Speed Forums

The campaign for genuine road safety
It is currently Thu Jun 04, 2026 15:36

All times are UTC [ DST ]




Post new topic Reply to topic  [ 73 posts ]  Go to page Previous  1, 2, 3, 4
Author Message
 Post subject:
PostPosted: Mon Sep 05, 2005 20:15 
Offline
Gold Member
Gold Member
User avatar

Joined: Wed Aug 10, 2005 00:04
Posts: 2311
Lum wrote:
I do thank you very much.

ok, almost nobody bothers.


Capri2.8i wrote:
Apparently the heat generated is not allowed to escape with the pad being in contact with the disc and all the heat sinks in, presumably resulting in warping. Not 100% convinced, it is perhaps just 'in theory'?

I think the pads can actually weld themselves to the discs if the discs are hot enough BUT if you're generating that sort of heat in your brakes on a road that has traffic lights then you're probably pushing just that little bit too hard.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Mon Sep 05, 2005 20:23 
Offline
Life Member
Life Member
User avatar

Joined: Wed Apr 13, 2005 14:00
Posts: 1271
Location: Near Telford, UK / Barcelona, Spain
Capri2.8i wrote:
Apparently the heat generated is not allowed to escape with the pad being in contact with the disc and all the heat sinks in, presumably resulting in warping. Not 100% convinced, it is perhaps just 'in theory'?

johnsher wrote:
I think the pads can actually weld themselves to the discs if the discs are hot enough BUT if you're generating that sort of heat in your brakes on a road that has traffic lights then you're probably pushing just that little bit too hard.

The other thing you can do is heat-sink from the disc into the pad / caliper and overheat your brake fluid, giving a soft or non-existant pedal.. NB same caveat about "pushing a bit too hard".

_________________
"Politicians are the same the world over... We build bridges where there aren't any rivers." - Nikita Kruschev


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 13:16 
Offline
Member
Member

Joined: Fri Apr 22, 2005 10:30
Posts: 2053
Location: South Wales (Roving all UK)
Don't shoot the messenger!


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 13:46 
Offline
Life Member
Life Member

Joined: Fri Mar 12, 2004 10:47
Posts: 920
Location: South Bucks
civil engineer wrote:
my pet hate is the c class merc with the stupid foot operated handbrake. Confuses the hell out of me every time, just can't come to terms with it!


Most Mercs have a foot operated parking brake. Makes perfect sense to me. Think of the space it frees up for a start.

In practice, there is absolutely no chance of engaging it accidentally because it is far to the left (in a RHD) and much higher than the other pedals.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 16:50 
Offline
User
User avatar

Joined: Thu Apr 28, 2005 00:01
Posts: 2258
Location: South Wales
johnsher wrote:
I think the pads can actually weld themselves to the discs if the discs are hot enough BUT if you're generating that sort of heat in your brakes on a road that has traffic lights then you're probably pushing just that little bit too hard.


Ever driven on the East Lancashire Road? It's a very long very straight NSL dual carriageway A-road, it has traffic lights from time to time and a pathetically short amber time for such a road. If those lights go amber you have to know your exact stopping distance, because if you carry on you'll just make it before it goes red and if you do a full on emergency stop, you'll just make the stop line (then get rear ended most likely). It's a stupid road IMO.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 18:05 
Offline
Gold Member
Gold Member
User avatar

Joined: Wed Aug 10, 2005 00:04
Posts: 2311
one emergency stop isn't going to heat your brakes up enough to cause any damage from leaving them applied at the lights. To get them that hot you need to do (the equivalent of) a few hard laps around a race track.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 18:58 
Offline
User
User avatar

Joined: Thu Apr 28, 2005 00:01
Posts: 2258
Location: South Wales
There are lots of such junctions all in a row for a good 10 or so miles of the east lancs.

Admittedly I've never had brake fade on there (only place I have had it is on the run from the Wirral to Flint, there's a bit near a funky suspension bridge that is constant NSL-dual then roundabout, and this was years ago in a crappy Escort. I drive more sensibly and have better brakes these days :)


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 19:54 
Offline
Gold Member
Gold Member
User avatar

Joined: Wed Aug 10, 2005 00:04
Posts: 2311
Lum wrote:
There are lots of such junctions all in a row for a good 10 or so miles of the east lancs.

well if you're managing an emergency stop at every one of them I'd recommend driving at a different speed - or bigger brakes :D


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 22:13 
Offline
Gold Member
Gold Member

Joined: Thu May 19, 2005 22:21
Posts: 925
I was just thinking of the East Lancs actually! I hate that road! Lum is quite correct, it can be a daunting expierence doing 70mph and then having the lights turn amber. If you hesitate for a second you risk overshooting and a rear-ender if you attempt a stop or getting flashed if you continue. If that traffic is bad it's quite feasable that you have to make several quite abbrupt stops from high speeds.

However, I accept that for your brakes to get that hot you need to be trying, and their are few situations where it would legitamatly occur. Their could be the odd exception however.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Sep 06, 2005 22:54 
Offline
User
User avatar

Joined: Thu Apr 28, 2005 00:01
Posts: 2258
Location: South Wales
johnsher wrote:
Lum wrote:
There are lots of such junctions all in a row for a good 10 or so miles of the east lancs.

well if you're managing an emergency stop at every one of them I'd recommend driving at a different speed - or bigger brakes :D


Or just get used to the timings on each set of lights :)


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Wed Sep 07, 2005 00:33 
Offline
Gold Member
Gold Member

Joined: Mon Mar 15, 2004 15:43
Posts: 2416
And back to getting brake and throttle mixed up in a self shifter... http://news.bbc.co.uk/1/hi/england/4219222.stm
Quote:
Driver fined over toddler's death

A driver who ran over and killed a three-year-old boy in a car park at Gatwick Airport was found guilty of careless driving by Sussex magistrates.

Albert Marchment, 62, panicked and hit the accelerator instead of the brake when Rhys Hood from Trecastle, Powys, stepped into his path.

He said he was not used to driving his wife's automatic car in May 2004.

Marchment, of South Ockenden, Essex, was fined £700, ordered to pay £365 in costs and given a year's driving ban.

He always denied the charges against him.

But District Judge Paul Tain said he was "unequivocally certain" that Marchment's driving had fallen below the required standard when his foot slipped onto the wrong pedal.

He also said that the position he adopted and the speed of his driving - 8 or 9mph in 5mph zone - were also contributing factors to his verdict.

The judge said the sentence handed down "bore no relation" to the loss suffered by Rhys' family.

The court heard that Marchment, a self-employed van driver, could stand to lose his family home if his main means of employment was removed.

Members of Rhys' family were at Mid Sussex Magistrates' Court in Haywards Heath to hear how Marchment's car collided with the youngster at the airport's North Terminal on 22 May.

Rhys had travelled with his father from their family home in Wales to see his grandparents off on holiday.

But the trial heard the excited youngster stepped out from behind a row of parked cars into the path of the Ford Mondeo, which Marchment admitted he only drove "once in a blue moon".

Rhys was dragged along before falling to the ground and being run over.

He suffered multiple injuries from which he died later the same day in hospital.

Outside the court, Rhys' grandfather David Hood, from Herefordshire, thanked friends and well-wishers who "had made the last 15 months bearable after Rhys' death".

Sgt Paul Williams, of Sussex Police, said the case was a reminder that people should be extra vigilant when travelling in unfamiliar locations and when driving unfamiliar vehicles.

"The events surrounding this incident are nothing less than tragic and our thoughts go out to the families of all those involved who have no doubt been devastated by its consequences," he added.

_________________
Make everything as simple as possible, but not simpler - Einstein


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Wed Sep 07, 2005 01:21 
Offline
Life Member
Life Member
User avatar

Joined: Sat Jul 24, 2004 13:36
Posts: 1339
Quote:
He also said that the position he adopted and the speed of his driving - 8 or 9mph in 5mph zone - were also contributing factors to his verdict.


What a fatuous remark on so many levels.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Sun Sep 11, 2005 11:56 
Offline
New User
New User

Joined: Sat Sep 10, 2005 16:04
Posts: 2
My girlfriend's family were involved in this type of incident. They were loading their car in a multi-storey, and had just left the vicinity of the boot, when a lady driver in a huge 4x4 hit the gas instead of the brake and managed to mount one of the extra high kerbs they have in car parks, and crush the back of the car. Her 10 year old sister had her ankle injured but seconds earlier and this could have been very serious. I work at a private school and 4x4s are out of control. There is one Humvee owner (I'm not joking) who picks their children up regularly, driving through the grounds to do so. A similar mistake in one of these could probably take out about 30 nippers! I don't support regulation against them, some people genuinely gain great pleasure out of these cars, but the reasons for most peoples ownership seem fairly trivial and you often see drivers who clearly have no conception of the size of the vehicle they are in.


Top
 Profile Send private message  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 73 posts ]  Go to page Previous  1, 2, 3, 4

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You can post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
[ Time : 0.011s | 9 Queries | GZIP : Off ]