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From: Ron Dargenio on 15 Nov 2009 20:32
On Oct 2, 1:04�am, Adam <adam.vazq...(a)gmail.com> wrote:
> > I wonder if they even tried to turn off the ignition at all. That is
> > all that is needed to stop a runaway car.
>
> Your age is showing. Some of the cars with those RFID chips inside the
> keys you cant do that. At least with those cars with the Press to
> Start button can kill the motor, but you have to read the manual
> first. Some you have to hold the start button , some you have to press
> twice. confusing aint it?
>
> Turning off the ignition by turning the ignition key �is not
> necessarily the best way to stop a runaway. Most people twist the key
> striaght to locking the steering column, making a bad situation worse.
>
> The driver of that MVA was not the owner of the car, making the
> situation worse, driving a unfamiliar car. Best practice with such an
> auto is to throw it into neutral and let the rev limiter engage when
> the engine red-lines.


It may be possible to make a throttle stick, but here are the laws of
physics:
No car can overpower its brakes. From any speed. If your foot is on
the brake pedal the car will come to a stop. From 10, 20, 80, 120 MPH.
I have personally done this on a closed track. When people say the car
continues to accelerate despite "pressing with all their might" on the
brakes, their foot wasn't on the brake pedal.

Simple. End of story.
From: Michael Golden on 15 Nov 2009 22:43
Ron Dargenio wrote:

> > Most people twist the key striaght to locking the steering column,
> > making a bad situation worse.
>
>
> It may be possible to make a throttle stick, but here are the laws of
> physics:
> No car can overpower its brakes. From any speed. If your foot is on
> the brake pedal the car will come to a stop. From 10, 20, 80, 120 MPH.
> I have personally done this on a closed track. When people say the car
> continues to accelerate despite "pressing with all their might" on the
> brakes, their foot wasn't on the brake pedal.
>
> Simple. End of story.

The cars I've driven, you have to REMOVE the key to get the steering
column to lock.
From: Reed on 16 Nov 2009 00:18
Ron Dargenio wrote:
> On Oct 2, 1:04�am, Adam <adam.vazq...(a)gmail.com> wrote:
>>> I wonder if they even tried to turn off the ignition at all. That is
>>> all that is needed to stop a runaway car.
>> Your age is showing. Some of the cars with those RFID chips inside the
>> keys you cant do that. At least with those cars with the Press to
>> Start button can kill the motor, but you have to read the manual
>> first. Some you have to hold the start button , some you have to press
>> twice. confusing aint it?
>>
>> Turning off the ignition by turning the ignition key �is not
>> necessarily the best way to stop a runaway. Most people twist the key
>> striaght to locking the steering column, making a bad situation worse.
>>
>> The driver of that MVA was not the owner of the car, making the
>> situation worse, driving a unfamiliar car. Best practice with such an
>> auto is to throw it into neutral and let the rev limiter engage when
>> the engine red-lines.
>
>
> It may be possible to make a throttle stick, but here are the laws of
> physics:
> No car can overpower its brakes. From any speed. If your foot is on
> the brake pedal the car will come to a stop. From 10, 20, 80, 120 MPH.
> I have personally done this on a closed track. When people say the car
> continues to accelerate despite "pressing with all their might" on the
> brakes, their foot wasn't on the brake pedal.
>
> Simple. End of story.

If the engine is held, or stuck, at full throttle (say 120 mph), can
the car be stopped by the brakes ?? I have not tried it myself, but I
doubt any stock brakes could overcome full throttle.
From: Mark on 16 Nov 2009 12:22

>
> It may be possible to make a throttle stick, but here are the laws of
> physics:
> No car can overpower its brakes. From any speed. If your foot is on
> the brake pedal the car will come to a stop. From 10, 20, 80, 120 MPH.
> I have personally done this on a closed track. When people say the car
> continues to accelerate despite "pressing with all their might" on the
> brakes, their foot wasn't on the brake pedal.
>
> Simple. End of story.- Hide quoted text -
>
> - Show quoted text -

you are wrong, it is not that simple,

at full throttle, there is little vacumm for the brake power booster,
once the storage vacumm is used up you loose the power boost to your
brakes,,

do you think you can over come a full throttle engine with power
brakes that have lost their power boost...

Mark
From: Ray O on 16 Nov 2009 15:37

"Mark" <makolber(a)yahoo.com> wrote in message
news:948703ee-d557-4114-b893-b7bc96001a2b(a)w19g2000yqk.googlegroups.com...
>
>>
>> It may be possible to make a throttle stick, but here are the laws of
>> physics:
>> No car can overpower its brakes. From any speed. If your foot is on
>> the brake pedal the car will come to a stop. From 10, 20, 80, 120 MPH.
>> I have personally done this on a closed track. When people say the car
>> continues to accelerate despite "pressing with all their might" on the
>> brakes, their foot wasn't on the brake pedal.
>>
>> Simple. End of story.- Hide quoted text -
>>
>> - Show quoted text -
>
> you are wrong, it is not that simple,
>
> at full throttle, there is little vacumm for the brake power booster,
> once the storage vacumm is used up you loose the power boost to your
> brakes,,
>
> do you think you can over come a full throttle engine with power
> brakes that have lost their power boost...
>
> Mark

Even with no power assist, pedal effort does not increase with vehicle or
engine speed. Before power assisted brakes were introduced, people
routinely stopped vehicles by stepping hard on the brake pedal. While it
does take more pedal effort to brake a vehicle that was designed to have
power assist and that lost the assist, the amount of effort is more or less
the same whether the car is traveling at 30 or 60 MPH and with the engine at
idle or at redline. Stopping distances will increase with higher speeds and
higher engine RPM, just like it does when the power assist is working.
--

Ray O
(correct punctuation to reply)


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