The invention relates to a fuel tank (19) and a differential frame (3) in a fuselage airframe (1) of a helicopter, the fuel tank (19) being installed between the fuselage lower cover shell (4) and the floor panel (5). The differential frame (3) separates the fuel tank (19) into two individual compartments, the differential frame (3) having a web (15) below the floor panel with a variable-height (23) with a minimum height at the symmetry axis (18) of the fuselage cross-section and a maximum height at lateral frame roots regions (27). A transversal beam (7) is attached at each of its both ends to the differential frame (3) bridging the entire variable-height (23) of the differential frame (3) and the fuel tank (19) with two front and rear fuel bladders (20, 21) covering both individual tank compartments with a middle bladder (22) installed between the transversal beam (7) and the variable-height web (15) of the differential frame (3).
Fuselage Airframe and Tank
Rumpflugzeugzelle und Tank
Cellule de fuselage et réservoir
2018-01-03
Patent
Electronic Resource
English
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