Flavio Formosa schrieb:
My LS8 has 'root rib vents': can I put a wing on the
ground after filling tanks without having water drip
from the vent tubes?

No. The vent tube will fill with water and (some of) that will run out
when you level the wings again. It will run in to the fuselage and out
the bottom of it if the wing gap is nicely sealed. Not a real problem
but I'd avoid it anyway.

Manual states this is prohibited on LS8s fitted with
'winglet vents',

Because all the water would run in to the wing if the winglet gap is
well sealed. At least the metal parts near the end of the wing would be
in water. Not good.

regards
Marcel