Gigantic bubble in rubber roof
.....not mine, but saw a pickup towing a really nice new looking silver, gray and black 5ver down the interstate. I noticed a bubble in the front 5' or so of his roof. It had to be 2' tall and floppin...
Forum Discussion
You don't need a hole to make it bubble like that.
The air moving over the top is moving much faster than the tiny amount of air trapped under the membrane. This faster moving air has a lower pressure, and in turn, that minor amount of air under the membrane is now at higher pressure relative to the air above it. The pressure makes it balloon because there's no place for the air to go (no hole).
FWIW, this is how an airplane wing works - by making the air going over the top of it move faster than the air under it - creating "lift".
The air moving over the top is moving much faster than the tiny amount of air trapped under the membrane. This faster moving air has a lower pressure, and in turn, that minor amount of air under the membrane is now at higher pressure relative to the air above it. The pressure makes it balloon because there's no place for the air to go (no hole).
FWIW, this is how an airplane wing works - by making the air going over the top of it move faster than the air under it - creating "lift".
