To the best of my knowledge, no tankers are lying offshore waiting to discharge, nor is there a shortage of ullage.
This is why auction houses and retailers of mature wines pay close attention to the ullage levels in determining the resale value of the wine.
Excessive ullage in a tank may contribute to the free surface effect.
Under this same traditional style of winemaking, a large ullage or air space would emerge in the barrel and oxidation took place.
This causes the ullage fuel air ratio to increase rapidly and the ullage fuel air ratio to exceed the lower flammability limit.
As a wine ages in the bottle, the amount of ullage will continue to increase unless a wine is opened, topped up and recorked.
During the bottling process, most wineries strive to have an initial ullage level of between 0.2-0.4 inches (5-10mm).
The fourth stage then coasted until one hour and fifty seconds after launch, when it fired its ullage motors in preparation for ignition.
