Fuels. Aero-engine fuels are either refined from crude petroleum or obtained from coal, the latter source being that on which Germany has had largely to depend.
The great majority of aero-engines run on what is so commonly termed "high grade aviation spirit," but a few compression-ignition engines running on heavier fuels are in service, notably in Germany.
Fuel-contents Gauge. A gauge for indicating the contents of a fuel tank ie full or empty etc.
Fuel-flow Meter. An instrument for indicating the rate of flow of fuel.
Fuel-jettison Gear. Gear to enable part of an aeroplane's fuel load to be discharged in case of emergency. This is particularly important with modern aeroplanes because of the high wing-loadings at take-off in general use - loadings too great for safe landing if one should become necessary soon after take-off.
Fuel Tank. A tank containing the fuel supply for an aero-engine.
المصدر:GLOSSARY OF FLYING
A DICTIONARY OF AERONAUTICAL TERMS
http://www.aeroplanemonthly.com/glossary/glossary_F.htm