I’d guess thin edge due to reduced wind resistance ?
Thule have the fat edge to the front. I fitted Vanstyle ones with the thin edge to the front then changed to fat edge at front after some research. Doesn't make any noticeable difference in my experience - no additional wind noise etc.
Fat edge first should give less wind resistance in theory. Also wont produce lift unless it's an aerofoil shape.
Glad @Skyliner33 knows what he’s taking about!
I always put the thin edge 1st as the h2o minus the Co2 plus the waffle sprocket twisting against the giggling pin saves me 0000.3 mpg.
Remember the wibble pin needs to be centered
here's a clue
That’s what I would have thought but the brackets that hold the cross bars to the rails have L and R marked on them. Unless I got my left and right mixed up during the fitting process
Mine are Thule and fat end front. Wish they did create lift as that would be handy when stuck behind an outside lane hogger.
You’d only get lift on an aerofoil shaped like the one in the picture above if the angle of attack was such that it was mounted so the front was higher than the back edge (and there would be so little that you wouldn’t pull the skin off a rice pudding) this would create more drag than lift.
To give any significant lift, the shape would have to be such that there was a longer side on the top than the bottom, thus the air passing over the top has to go faster to keep up with the air that passed over the underside (shorter side) and this faster speed creates a lower pressure (Bernoulli effect) that essentially sucks the aerofoil upwards rather than pushing it up from beneath which is how most people think a wing works.
To give any significant lift, the shape would have to be such that there was a longer side on the top than the bottom, thus the air passing over the top has to go faster to keep up with the air that passed over the underside (shorter side) and this faster speed creates a lower pressure (Bernoulli effect) that essentially sucks the aerofoil upwards rather than pushing it up from beneath which is how most people think a wing works.
Good answer, however it is the difference in air pressure between the top and bottom of the aerofoil that produces the lift. Higher air pressure under the wing produces a bigger force up than the downwards force produced by the lower air pressure above the wing. Therefore the resultant force on the wing is upwards, producing the lift. Put the wing on upside down (like F1 cars) and it works the other way.
Air pressure cant "suck" only "push".
You get more effect from the lower pressure sucking the wing upwards than the high pressure pushing it upwards.
Nature abhors a vacuum, it is easier to suck a bowling ball into the end of a vacuum cleaner hose end than it is to blow air under it to lift it up.
Nature abhors a vacuum, it is easier to suck a bowling ball into the end of a vacuum cleaner hose end than it is to blow air under it to lift it up.
Too early in the morning for all this science 
where’s me coffee
where’s me coffee
