MrWizard wrote:
'No Air' ?
they are Not in a Vacuum !
there is air, dense NON-moving air
no air moving underneath, means little to NO pressure differential
the air on top, coming over the raised front should provide down pressure
remembering my high school physics !
I did not fail Physics :)
Just try to understand how it works,
When high speed winds are blown over any kind of roof the pressure of wind reduces there but the air pressure under the roof is still the same which pushes the roof and results in the roof to blow off. That's why/how winds blow off roofs - also why Hurricane Straps are used/required on all the roofs in the Gulf and Florida strap them to the walls and strap the walls to the Floors and the Floors to the Footings.
Just plain and simple,
Dick, just PM me when the paper flies out, as it will fly out.
Bill
Easiest way to watch this work is with high speed air over the top of a deck of cards they will all lift and be blown away, just simple Physics.