FIRE AEROPLANE LIQUID TAKING SYSTEM Russian patent published in 1995 - IPC

FIELD: aeronautical engineering; devices for delivery of extinguishants to seat of fire. SUBSTANCE: system has devices for taking the liquid into tanks of flying vehicle, device for draining liquid from tanks when its level is too high; this device is made in form of drain branch pipe 4 rotatable in vertical plane which is connected with controllable drive 7; system is provided with four-arm bridge whose two arms are made of potentiometer 9 for taking signal of flow rate of fuel and two other arms are made of potentiometer 8 which is mechanically linked with drive 7 of drain branch pipe 4; when level of fuel in flying vehicle tank drops, electric bridge gets out of balance and drive mechanism 7 turns branch pipe 4 and wiper of potentiometer 8 to position corresponding to balanced state of electric bridge. EFFECT: enhanced reliability and accuracy of operation due to automation of liquid drain control. 3 dwg