Mxsmanic , IFR sensations, and some other stuff

Stealth Pilot writes:

downwash occurs after the wing has passed.

Downwash is the result of the wing's passing. The wing accelerates air above
it downwards. That downward movement continues after the wing has passed, and
it is called downwash. It is the acceleration that produces the downwash that
is responsible for lift.

On Thu, 22 May 2008 20:13:44 +0200, Mxsmanic
wrote:

Stealth Pilot writes:

downwash occurs after the wing has passed.

Downwash is the result of the wing's passing. The wing accelerates air above
it downwards. That downward movement continues after the wing has passed, and
it is called downwash. It is the acceleration that produces the downwash that
is responsible for lift.

no.
what pushes the aeroplane up into the air is the pressure differences
at the surface of the wing.

the whole purpose of the rest of it is to create those pressure
differences *at the surface*.

a wingtip vortex is an example of pressure differences not at the
surface and those just cause drag.

keep at it son. one day it is sure to sink in.
Stealth Pilot

On May 23, 7:27 am, Stealth Pilot
wrote:
It's easy to write the equations, it's classic physics stuff. Start
from basic principles.

You need not involve chaos theory, although some posters seem to try.

"Tina" wrote in message
...
On May 23, 7:27 am, Stealth Pilot
wrote:
It's easy to write the equations, it's classic physics stuff. Start
from basic principles.

You need not involve chaos theory, although some posters seem to try.

By this thread I no longer consider it a theory.

Mxsmanic wrote:
Stealth Pilot writes:

aeroplanes fly because of lift generated by pressure differences on
the wing surfaces.

Airplanes fly because the wings divert the air through which they pass
downwards, creating a downwash and exerting a force in doing so that engenders
an opposite force that is lift.

... these pressure differences are caused by the shape
of the aerofoil of the wing ...

The air is diverted because the wing has a positve angle of attack. It can be
perfectly flat and it will still generate lift.


If that were the case a 747 would have to be producing over 250,000
pounds of force straight down. Why then am I not crushed when a 747
flies over me?

In rec.aviation.student Gig 601Xl Builder wrote:
Mxsmanic wrote:
Stealth Pilot writes:

aeroplanes fly because of lift generated by pressure differences on
the wing surfaces.

Airplanes fly because the wings divert the air through which they pass
downwards, creating a downwash and exerting a force in doing so that engenders
an opposite force that is lift.

... these pressure differences are caused by the shape
of the aerofoil of the wing ...

The air is diverted because the wing has a positve angle of attack. It can be
perfectly flat and it will still generate lift.

If that were the case a 747 would have to be producing over 250,000
pounds of force straight down. Why then am I not crushed when a 747
flies over me?

At sea level the atmosphere pushes down with about 14.7 pounds of force
for every square inch of exposed surface. On the average man, this works
out to about 43,000 pounds, all the time. Why aren't your crushed by this?

--
Mike Ash
Radio Free Earth
Broadcasting from our climate-controlled studios deep inside the Moon

Michael Ash wrote:


At sea level the atmosphere pushes down with about 14.7 pounds of force
for every square inch of exposed surface. On the average man, this works
out to about 43,000 pounds, all the time. Why aren't your crushed by this?


I don't know about you but Celine Dion gave me an invisible force-field.

--
Message posted via AviationKB.com
http://www.aviationkb.com/Uwe/Forums...ation/200805/1

On Thu, 22 May 2008 10:52:15 -0500, Michael Ash wrote:

In rec.aviation.student Gig 601Xl Builder wrote:
Mxsmanic wrote:
Stealth Pilot writes:

aeroplanes fly because of lift generated by pressure differences on
the wing surfaces.

Airplanes fly because the wings divert the air through which they pass
downwards, creating a downwash and exerting a force in doing so that engenders
an opposite force that is lift.

... these pressure differences are caused by the shape
of the aerofoil of the wing ...

The air is diverted because the wing has a positve angle of attack. It can be
perfectly flat and it will still generate lift.

If that were the case a 747 would have to be producing over 250,000
pounds of force straight down. Why then am I not crushed when a 747
flies over me?

At sea level the atmosphere pushes down with about 14.7 pounds of force
for every square inch of exposed surface. On the average man, this works
out to about 43,000 pounds, all the time. Why aren't your crushed by this?

Because I eat beans?

In rec.aviation.student Gezellig wrote:
On Thu, 22 May 2008 10:52:15 -0500, Michael Ash wrote:

In rec.aviation.student Gig 601Xl Builder wrote:
Mxsmanic wrote:
Stealth Pilot writes:

aeroplanes fly because of lift generated by pressure differences on
the wing surfaces.

Airplanes fly because the wings divert the air through which they pass
downwards, creating a downwash and exerting a force in doing so that engenders
an opposite force that is lift.

... these pressure differences are caused by the shape
of the aerofoil of the wing ...

The air is diverted because the wing has a positve angle of attack. It can be
perfectly flat and it will still generate lift.

If that were the case a 747 would have to be producing over 250,000
pounds of force straight down. Why then am I not crushed when a 747
flies over me?

At sea level the atmosphere pushes down with about 14.7 pounds of force
for every square inch of exposed surface. On the average man, this works
out to about 43,000 pounds, all the time. Why aren't your crushed by this?

Because I eat beans?

Score yet another point for the musical fruit.

--
Mike Ash
Radio Free Earth
Broadcasting from our climate-controlled studios deep inside the Moon

Michael Ash wrote:

At sea level the atmosphere pushes down with about 14.7 pounds of force
for every square inch of exposed surface. On the average man, this works
out to about 43,000 pounds, all the time. Why aren't your crushed by this?

I'm too emotionally stable to be crushed by such a trivial thing.

Besides, I push back with equal force.