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Old June 23rd 04, 07:23 PM
Robert Briggs
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Ed Rasimus wrote:
Robert Briggs wrote:
Ed Rasimus wrote:

Higher speeds mean the store can generate lift (just like any curved
surface.)


IIRC, "curved" is unnecessary here. After all, they do say that, given
enough thrust, a brick will fly, do they not?


Actually, no. Lift is balanced by weight, while thrust opposes drag.


This assumes more than I wrote.

Can you say "Harrier", for example?

Okay, I didn't have that aeroplane in mind, but I *was* careful not to
specify any particular angle of attack - after all, an "inverted" pass
at an air display is not *exactly* inverted, with the aerofoil acting
against you (in the case of "ordinary" aeroplanes, at any rate).

The brick (AKA F-4) would not really "fly", but simply be propelled in
the desired direction. It is the tendency for airflow to accelerate
over a curved surface creating a low pressure area that causes "lift".
The dropped store had better be curved if you want to get lift, since
it isn't supplied with thrust.


I was also careful to omit any assertion about the aerodynamic stability
of the brick.