Earl's Build

[Gina]

We're on the side of a hill and quite often get blasted by the wind. I'm going to have to do something too.

[fwm891]

I'm no aerodynamics expert, but doesn't the lift of an aircraft wing depend on air going over *and* under the wing with the air above the wing having a slightly longer path and therefore lower pressure?

Your right but look at the end profile of the roof - it (airflow) has a longer path across the top surface than if it follows the underside (even a thin roof covering has some thickness), airflow under the roof is more likely to become turbulent because the underside is hollow further reducing its speed and increasing lift...

Francis (I'm prepared to be shot down on this one)

[yesyes]

I see. My point was that I think there is probably not enough (if any) air flow underneath the roof when it's closed. But of course I would still clamp it down somehow if I built an obs. ;-)

Now, the roof in the open position is a whole different story.

[Psychobilly]

Of course you never see a roof being ripped of a house or other building......

Billy on the San Fran

.....

[russ]

That's looking really good Earl. I can only dream of such things.

[franco]

really enjoyed reading this thread