Noun
drop tank (plural drop tanks)
(aviation) An expendable external fuel tank on an aircraft.
Along with a change order specifying some P-38Es be produced without guns but with photo reconnaissance cameras, to be designated the F-4-1-LO, Lockheed began working out the problems of drop tank design and incorporation. Source: Internet
In November 1941, Kelsey gave the unofficial nod to Johnson and the P-38 team to engineer a drop tank system to extend range for the fighter, and they completed the initial research and development without a contract. Source: Internet
A feature was the improved range with convert wing tank and convert drop tank. Source: Internet
Some Model 21 and 52 aircraft were converted to "bakusen" (fighter-bombers) by mounting a bomb rack and 250 kg bomb in place of the centerline drop tank. Source: Internet
The F.4 could be fitted with a drop tank under each wing, and experiments were carried out with carriage of underwing stores and also in lengthened fuselage models. Source: Internet
Ju 87R A standard 300 litre drop tank from a Bf 109 - similar in appearance to those used by the Ju 87R. Source: Internet