JIMNLIN wrote:
:Bwanderingbob wrote:
Billowing roof , what I did on two trailers , took brass carpet tacks , nailed it down allover , then put appropriate sealer , roof treat on em .Ain't leaked yet , been seven years .
wanderingbob wrote:
Billowing roof , what I did on two trailers , took brass carpet tacks , nailed it down allover , then put appropriate sealer , roof treat on em .Ain't leaked yet , been seven years .
ScottG wrote:fj12ryder wrote:ScottG wrote:We've had this discussion before, you can't have lift without air underneath the roof trying to equalize the pressure. If the roof is billowing there is a area somewhere letting air get under the roof.
You don't have to have loose edges - just a loose center area.
As you drive, the air moving over the top of the roof is moving faster than the air under it. The faster moving air has a lower pressure than the air underneath.
The result is "lift" and exactly how an airplance flies.
Of course any way you look at it, it is bad news. Sooner or later something will pull loose in a big way.
Air is underneath - it the atmosphere and it's everywhere on earth. The difference is it's not under pressure under there until you remove the pressure from the outside.
Just like our bodies will rupture in outerspace, that air is higher pressure than the outside.
We once had a car that had a vinyl roof. It would do the same thing. Dealer tried sealing it all around but since there was no leak, it never helped. Only removing it and re-gluing the entire "field" would hold it down.
Here is a simple explanation of how lift works: (technically refered to as the Bernoulli Effect).
Lift
Howie3 wrote:ScottG wrote:
You don't have to have loose edges - just a loose center area.
As you drive, the air moving over the top of the roof is moving faster than the air under it. The faster moving air has a lower pressure than the air underneath.
The result is "lift" and exactly how an airplance flies.
I wish I could get my trailer to do that. Would be nice to fly over the traffic instead of being in gridlock. ;)
ScottG wrote:
You don't have to have loose edges - just a loose center area.
As you drive, the air moving over the top of the roof is moving faster than the air under it. The faster moving air has a lower pressure than the air underneath.
The result is "lift" and exactly how an airplance flies.
