"Ellen MacArthur" wrote in message
reenews.net...

"Scotty" wrote
| compression & combustion


In other words, fire...... Most people think gasoline and diesel fuel
*explodes* on top of the piston
inside the cylinder inside the motor but it *burns*.

An explosion is nothing more than an extremely rapid burn.

Max

"Maxprop" wrote
| An explosion is nothing more than an extremely rapid burn.

Not quite right (I think). Here's how I understand it. A burn starts at one end
of the cylinder near the spark plug and goes down towards the top of the piston.
It expands evenly and pushes the piston down. An explosion starts somewhere in
the middle of the fuel/air and pushes outwards really fast in all directions. It
wastes energy and is too fast so it knocks against the piston and sometimes can
even blow off a head gasket. An explosion isn't really a burn.

Cheers,
Ellen

"Maxprop" wrote
| An explosion is nothing more than an extremely rapid burn.

Ellen MacArthur wrote:
Not quite right (I think).

Yes, it is right.

Here's how I understand it. A burn starts at one end
of the cylinder near the spark plug and goes down towards the top of the piston.
It expands evenly and pushes the piston down. An explosion starts somewhere in
the middle of the fuel/air and pushes outwards really fast in all directions.

Why would an explosion start in a different place? It
originates at the spark plug, doesn't it?

It
wastes energy and is too fast so it knocks against the piston and sometimes can
even blow off a head gasket.

Yes, that's also right.

An explosion isn't really a burn.


Yes it is. Both in the context of internal combustion, and
other circumstances. Dynamite, for example, is a highly
combustible substance that burns very very rapidly.

DSK

"DSK" wrote in message
...
"Maxprop" wrote | An explosion is nothing more than an extremely rapid
burn.

Ellen MacArthur wrote:
Not quite right (I think).

Yes, it is right.

Here's how I understand it. A burn starts at one end
of the cylinder near the spark plug and goes down towards the top of the
piston. It expands evenly and pushes the piston down. An explosion starts
somewhere in the middle of the fuel/air and pushes outwards really fast
in all directions.

Why would an explosion start in a different place? It originates at the
spark plug, doesn't it?

It wastes energy and is too fast so it knocks against the piston and
sometimes can even blow off a head gasket.

Yes, that's also right.

An explosion isn't really a burn.


Yes it is. Both in the context of internal combustion, and other
circumstances. Dynamite, for example, is a highly combustible substance
that burns very very rapidly.

We used to use an explosive called HDP (2 and 3 pound charges) to control
avalanches (set them off, in actuality) at Breckenridge in the 70s when I
was a pro ski patrolman there. The company that made the charges referred
to HDPs 'burn rate' of 24,000 feet per second. Even primacord has a 'burn
rate' of about 20k feet per second.

This is the first post of Ellen's that seems to dispel the notion that "she"
is actually Neal in verbal drag. Neal would know better.

Max

Maxprop wrote:
This is the first post of Ellen's that seems to dispel the notion that "she"
is actually Neal in verbal drag. Neal would know better.


Why do you say that? Neal was/is pretty dumb.

FWIW I agree that "Ellen" doesn't seem to be Neal. I wonder
if "she" is one of JAXAshby's old flames.

DSK

"DSK" wrote in message
.. .
Maxprop wrote:
This is the first post of Ellen's that seems to dispel the notion that
"she" is actually Neal in verbal drag. Neal would know better.


Why do you say that? Neal was/is pretty dumb.

FWIW I agree that "Ellen" doesn't seem to be Neal. I wonder if "she" is
one of JAXAshby's old flames.

It has been a while since Jax departed. I suppose "she" could be Jax
him/herself, but who knows in this deceptive forum.

Max

Maxprop wrote:
"DSK" wrote in message
.. .

Maxprop wrote:

This is the first post of Ellen's that seems to dispel the notion that
"she" is actually Neal in verbal drag. Neal would know better.


Why do you say that? Neal was/is pretty dumb.

FWIW I agree that "Ellen" doesn't seem to be Neal. I wonder if "she" is
one of JAXAshby's old flames.


It has been a while since Jax departed. I suppose "she" could be Jax
him/herself, but who knows in this deceptive forum.

Max


It's Neal....

"Ellen MacArthur" wrote in
message
reenews.ne
t...

"Maxprop" wrote
| An explosion is nothing more than an extremely rapid
burn.

Not quite right (I think). Here's how I understand it.
A burn starts at one end
of the cylinder near the spark plug and goes down towards
the top of the piston.


In a diesel?

Scotty wrote:

"Ellen MacArthur" wrote in
message
reenews.ne
t...

"Maxprop" wrote
| An explosion is nothing more than an extremely rapid
burn.

Not quite right (I think). Here's how I understand it.
A burn starts at one end
of the cylinder near the spark plug and goes down towards
the top of the piston.

In a diesel?

Yes

Cheers
Marty

"Martin Baxter" wrote
| In a diesel?
|
| Yes

Even I know diesels don't have spark plugs. But diesels squash the air so hard
it gets hot. It gets so hot the diesel fuel that's squirted in from the injector catches
on fire and burns. It doesn't really explode. It just burns faster than gasoline. It only
burns along the sides towards the middle because there's no air in the middle of the
fuel. That's why diesels make that rattling noise.

Cheers,
Ellen