Liquid metal imbalance of the surface tension induces a pressure difference between the rear and the head, which produces a thrust to drive the droplet toward the head; at the same time, the hydrogen produced in the electrochemical reaction process also further raises the thrust. The discovery of this phenomenon laid the technical foundation for the development of intelligent motors, vascular robots, fluid pumping systems, flexible actuators and even more complex liquid metal robots. Liquid metal Liquid metal consists of alloys with very low melting points which form a eutectic that is liquid at room temperature. The standard metal used to be
Military and Technical Training Center of the Air Force and De Havilland Chipmunk aircraft. In 1992, the Ota Air Base is deactivated as air base, merging with the Training Center no. 2 and becoming the Military and Technical Training Center of the Air Force. Military and Technical Training Center of the Air Force The Military and Technical Training Center of the Air Force () or CFMTFA is the unit responsible for the military, humanistic, technical and scientific training of the personnel of the Portuguese Air Force. It is located in Ota (Alenquer Municipality), occupying the facilities of the former Ota Air Base (officially, the Air Base No 2). Around