Backwash Causes Lift?

Le Chaud Lapin writes:

What is the definition of a stall anyway?

An abrupt loss of lift.

I'm saying that, if you take a plane with certain critical angle,
throw away engine, put on an engine that can generate 10x the thrust,
the plane should still fly, even if you exceed critical angle.

No, the thrust of the engine doesn't matter, unless the engine itself is
supporting the weight of the aircraft with thrust (possible in a few fighter
aircraft). A wing above the critical angle will stall at any speed.

These books imply that the critical angle is angle at with bad things
happen above the wing, and because of that, the plane will fall.

Yes, true.

I'm saying that, you can have all the bad things happen above the wing and
still be able to keep the plane aloft due to compression that occurs
beneath the wing.

The wing is not supported by compression. It is supported by the displacement
of a mass (of air) downward. If this displacement ceases to take place, lift
disappears. A stalled wing does not divert air downward, so it doesn't
generate lift.

Mxsmanic wrote in
:

Le Chaud Lapin writes:

What is the definition of a stall anyway?

An abrupt loss of lift.

I'm saying that, if you take a plane with certain critical angle,
throw away engine, put on an engine that can generate 10x the thrust,
the plane should still fly, even if you exceed critical angle.

No, the thrust of the engine doesn't matter, unless the engine itself
is supporting the weight of the aircraft with thrust (possible in a
few fighter aircraft). A wing above the critical angle will stall at
any speed.

These books imply that the critical angle is angle at with bad things
happen above the wing, and because of that, the plane will fall.

Yes, true.

I'm saying that, you can have all the bad things happen above the
wing and still be able to keep the plane aloft due to compression
that occurs beneath the wing.

The wing is not supported by compression. It is supported by the
displacement of a mass (of air) downward. If this displacement ceases
to take place, lift

This should be entertaining.


Bertie

"Mxsmanic" wrote
Le Chaud Lapin writes:

What is the definition of a stall anyway?

An abrupt loss of lift.

Son, for someone who continually chastises the pilots here for their lack of
knowledge, you sure can come up with some doozies yourself!

BDS

On 3 Oct, 13:27, "BDS" wrote:
"Mxsmanic" wrote

Le Chaud Lapin writes:

What is the definition of a stall anyway?

An abrupt loss of lift.

Son, for someone who continually chastises the pilots here for their lack of
knowledge, you sure can come up with some doozies yourself!


Actually, it's correct, but only because he read it off wickepedia or
something.

It's not like he'd actually ever DO a stall.


Bertie

"Bertie the Bunyip" ...
On 3 Oct, 13:27, "BDS" wrote:
"Mxsmanic" wrote

Le Chaud Lapin writes:

What is the definition of a stall anyway?

An abrupt loss of lift.

Son, for someone who continually chastises the pilots here for their
lack of
knowledge, you sure can come up with some doozies yourself!


Actually, it's correct, but only because he read it off wickepedia or
something.

Here's my take on it - a stall occurs at the angle of attack where the
coefficient of lift stops increasing with angle of attack and begins to
decrease. It continues to decrease beyond this point as angle of attack is
increased further. It is not necessarily an abrupt change - most lift
versus angle of attack curves that I've seen do not have a drastic (abrupt)
drop beyond the peak.

BDS

BDS wrote:
"Bertie the Bunyip" ...
On 3 Oct, 13:27, "BDS" wrote:
"Mxsmanic" wrote

Le Chaud Lapin writes:

What is the definition of a stall anyway?

An abrupt loss of lift.

Son, for someone who continually chastises the pilots here for their
lack of
knowledge, you sure can come up with some doozies yourself!


Actually, it's correct, but only because he read it off wickepedia or
something.

Here's my take on it - a stall occurs at the angle of attack where the
coefficient of lift stops increasing with angle of attack and begins to
decrease. It continues to decrease beyond this point as angle of attack is
increased further. It is not necessarily an abrupt change - most lift
versus angle of attack curves that I've seen do not have a drastic (abrupt)
drop beyond the peak.

Yes, sorry, you´re right and that´s more accurate. i mistakenly
assumed that you were adfvocating the buffet definition.


Bertie

BDS wrote:
"Bertie the Bunyip" ...
On 3 Oct, 13:27, "BDS" wrote:
"Mxsmanic" wrote

Le Chaud Lapin writes:
What is the definition of a stall anyway?
An abrupt loss of lift.
Son, for someone who continually chastises the pilots here for their
lack of
knowledge, you sure can come up with some doozies yourself!

Actually, it's correct, but only because he read it off wickepedia or
something.

Here's my take on it - a stall occurs at the angle of attack where the
coefficient of lift stops increasing with angle of attack and begins to
decrease. It continues to decrease beyond this point as angle of attack is
increased further. It is not necessarily an abrupt change - most lift
versus angle of attack curves that I've seen do not have a drastic (abrupt)
drop beyond the peak.

BDS



This is a good explanation.

--
Dudley Henriques