fj12ryder wrote:
But that lift only works if there is a place for air to get under the roof and allow the relatively high pressure to raise the roof. If there's no place for the air to get under the roof membrane it isn't going anywhere. A wing won't work without the higher pressure opposite the low pressure.
Doesn't matter, since you're not talking big lift, like a plane. As long as the air passes around the sides, you'll still enough lift effect on the top to cause the membrane to lift. From most reports I've read, there is =no= air entering between the membrane and the roof panels.
Lyle