AIRCRAFT CRYOGENIC PROPELLANT FILLING SYSTEM Russian patent published in 1995 - IPC

FIELD: aeronautical engineering. SUBSTANCE: filling system consists the following items of ground filling equipment 21: propellant servicing truck 1 at whose outlet filling line 3 is mounted terminating in end-piece 4 for coupling with on-board filling point 5 of aircraft 22 connected with propellant tank 6 by means of filling pipe line 7. Tank 6 is provided with propellant vapor venting pipe line 11. Filling line 3 and venting pipe line 11 are connected coaxially with aircraft filling pipe line 7 by means of inner passage 13 of filling point. End-piece 4 of filling line 3 is provided with vapor discharge and recovery line 14 fitted with shut-off cock 15 which is coaxially connected with filling line 3 by means of external passage 16 of end-piece 4. Seal 17 fitted between end-piece 4 and point 5 (on their external passages 16) is used for isolating the vapor being vented from outside medium; additional seals 18 fitted on inner passages are used for separating the propellant from its vapor; passages 13 and 16 are provided with shut-off valves 19 and 20. EFFECT: high safety and reduction of time required for filling. 1 dwg