Patent ID: 7802753
Filing Date: 2010-09-28
Classification: B64D,B65D,G01F

Abstract:
1. An aircraft comprising a fuel tank, wherein inside the fuel tank there is provided at least one fuel measurement sensor, the fuel measurement sensor being connected to a control circuit via an electric signal carrying conductor, the aircraft including an inner conductive box in which the control circuit is housed, the inner conductive box being mounted inside an outer conductive box, there being conductive material sandwiched between the inner conductive and outer conductive boxes providing a conductive connection therebetween, the conductive connection therebetween having an impedance of greater than 5 KOhm and less than 1 MOhm, the inner conductive box and outer conductive box being located external to the fuel tank, at least one of the fuel measurement sensor and conductor are grounded to the inner conductive box, the aircraft having a common ground circuit, the outer conductive box being connected to the common ground circuit to facilitate the safe discharge of electricity from within the fuel tank via the inner conductive box, the aircraft being so arranged that during flight there is no short-circuit between the inner conductive box and the common ground circuit.