drop tank

(redirected from Droptank)
Also found in: Dictionary.

drop tank

[′dräp ‚taŋk]
(aerospace engineering)
A fuel tank on an airplane that may be jettisoned.

drop tank

drop tank
The auxiliary fuel tank(s) carried externally either under the wing (normally referred to as wing drop tank) or fuselage (called belly drop tank and which can be jettisoned, if so desired. Fuel is consumed from drop tanks first and from the aircraft internal tanks later, so that the drop tanks can be jettisoned, if so required.