Ambient pressure-responsive variable volume fuel tank

摘要

An apparatus is provided for a fuel tank system for an air vehicle. The system comprises a container (100) having an interior adapted to hold fuel, the container comprising a first opening (112) placing the interior in fluid communication with the ambient atmosphere, and a volumetrically-adjustable sizing device (130) adapted to change volume in response to changes in surrounding air pressure, the sizing element (130) disposed within the container and adapted to contain a fluid.