The first trip went to Paris where the extra fuel tanks were removed.
The extra fuel tanks increased the flight endurance to up to 50 hours.
The 504C was fitted with an extra fuel tank, in place of the observer.
This increase is possible through the removal of two seats for an extra fuel tank.
She stepped in and put on the extra tank.
The aircraft was also fitted with extra fuel tanks, taking 13 hours for the trip.
They were fitted with extra fuel tanks and cameras to carry out their work.
This 307 had its extra fuel tanks taken off.
The aircraft had been fitted with an extra fuel tank for the flight.
We will have to carry extra tanks of air, and travel many miles through vacuum.