What does low vapor pressure in jet fuel help to achieve?

Low vapor pressure in jet fuel is crucial for preventing fuel loss from vaporizing at high altitudes. At high altitudes, the atmospheric pressure decreases significantly, which can lead to the vaporization of fuels with high vapor pressures. If the fuel were to vaporize in the fuel tanks, it could create bubbles, leading to potential disruptions in fuel flow and possibly compromising engine performance.

Maintaining low vapor pressure ensures that the fuel remains in a liquid state under varying atmospheric conditions, thus maintaining consistent fuel delivery to the engines regardless of altitude. This property is particularly important for safety and efficiency in flight operations.

While other factors like fuel efficiency, the refueling process, and overall weight are relevant in aviation, they do not directly relate to the critical function that low vapor pressure serves in preventing vaporization of fuel at high altitudes.