Aircraft cargo platform assemblies and aircraft modular auxiliary fuselage fuel tank systems employing the same
Cargo load platform assemblies are especially adapted to provide support for a variety of cargo, such as auxiliary aircraft fuel tanks. According to certain embodiments herein, a load platform is provided which is adapted to being positioned onto a cargo deck of a cargo aircraft. At least one anti-rattle device is operatively associated with the load platform for positionally fixing the load platform to a tie-down ring of the cargo deck of a cargo aircraft. The cargo load platform may support a rigid fuel tank thereon so that auxiliary fuel tankage systems can be provided as may be needed.
1. A modular auxiliary fuel tankage system comprising:
(A) an aircraft cargo platform assembly comprising a load platform adapted to being positioned onto a cargo deck of a cargo aircraft;
(B) a rigid rectangular fuel tank having mutually perpendicular side and bottom panels defining lower front, lateral and aft edges of the fuel tank; and
(C) a plurality of tank connection assemblies removably connecting the fuel tank to the load platform at the lower front, lateral and aft edges, respectively, of the fuel tank, wherein
each of the tank connection assemblies comprises:
a lower fitting that is removably fixed to the aircraft cargo platform assembly, the lower fitting having at least one upwardly extending boss defining a lower fitting opening therethrough;
an upper fitting having (a) a downwardly extending fitting boss defining an upper fitting opening therethrough which is aligned with the lower fitting opening of the lower fitting, and (b) an angle support plate rigidly connected to portions of the mutually perpendicular side and bottom panels of the fuel tank; and
a bolt assembly positioned in the aligned lower and upper fitting openings to removably pivotally couple the lower and upper fittings to one another so as to connect the fuel tank to the load platform, and wherein
the aircraft cargo platform assembly comprises:
a plurality of anti-rattle devices operatively associated with the load platform along forward, aft and lateral sides thereof for positionally fixing the load platform to corresponding respective tie-down rings of the cargo deck, wherein each of the anti-rattle devices comprises:
(i) an upper connector having one end pivotally attached to the load platform and a threaded shaft extending axially therefrom;
(ii) a lower clevis connector having a threaded shaft extending therefrom in coaxial alignment with the threaded shaft of the upper connector;
(iii) a turnbuckle connector connecting the coaxially aligned threaded shafts of the upper connector and lower clevis connector; and
(iv) a primary quick-disconnect pin removably inserted in the lower clevis connector so as to be engaged with the tie-down ring of the cargo deck when the anti-rattle device is pivotally moved into an operative position.
2. The modular auxiliary fuel tankage system according to claim 1 , wherein
the clevis connector comprises an outwardly extending boss defining a boss aperture, and wherein
the turnbuckle connector comprises a flange defining a series of circumferentially spaced-apart flange apertures capable of being brought into alignment with the boss aperture upon turning movement of the turnbuckle connector; and wherein
the anti-rattle device further comprises a secondary quick-disconnect pin capable of being inserted in a respective one of the flange apertures and the boss aperture when aligned to prevent turning movement of the turnbuckle connector.
3. The modular auxiliary fuel tankage system according to claim 2 , further comprising a support fitting rigidly coupled to the cargo platform, and wherein the upper connector is pivotally connected to the support fitting to allow pivotal movements of the anti-rattle device between stowed and operative positions.
4. The modular auxiliary fuel tankage system according to claim 3 , wherein
the support fitting comprises a pair of spaced apart apertured connection lobes, and wherein
the upper connector comprises an eyelet connector at one end thereof which is positioned between and pivotally connected to the connection lobes.
5. The modular auxiliary fuel tankage system according to claim 4 , further comprising a bolt and nut assembly pivotally connecting the eyelet connector and the connection lobes.
6. The modular auxiliary fuel tankage system according to claim 1 , wherein the aircraft cargo platform assembly comprises multiple pairs of the anti-rattle devices.
7. The modular auxiliary fuel tankage system according to claim 6 , wherein the multiple pairs of the anti-rattle devices are positioned on at least lateral and rear sides of the load platform.
8. The modular auxiliary fuel tankage system according to claim 3 , wherein the upper connector comprises an upper clevis connector which is pivotally connected to the support fitting.
9. The modular auxiliary fuel tankage system according to claim 8 , wherein the support fitting includes an inverted U-shaped support fitting.
10. The modular auxiliary fuel tankage system according to claim 9 , wherein the inverted U-shaped support fitting comprises an apertured boss extending inwardly therefrom which is sized and configured to be received in the lower clevis connector, wherein insertion of the primary quick-disconnect pin through the clevis connector and the apertured boss retains the anti-rattle device in the stowed position thereof.
11. A cargo aircraft comprising:
a fuselage defining a cargo space;
a cargo deck having tie-down rings in the cargo space; and
at least one modular auxiliary fuel tankage system according to claim 1 .
12. The cargo aircraft according to claim 11 , wherein one of the upper and lower fittings comprises a pair of separated first fitting bosses, and another of the upper and lower fittings comprises a second fitting boss received between and pivotally connected to the first fitting bosses by the bolt assembly.
13. The cargo aircraft according to claim 11 , wherein
the clevis connector comprises an outwardly extending boss defining a boss aperture, and wherein
the turnbuckle connector comprises a flange defining a series of circumferentially spaced-apart flange apertures capable of being brought into alignment with the boss aperture upon turning movement of the turnbuckle connector; and wherein
the anti-rattle device further comprises a secondary quick-disconnect pin capable of being inserted in a respective one of the flange apertures and the boss aperture when aligned to prevent turning movement of the turnbuckle connector.
14. The cargo aircraft according to claim 13 , further comprising a support fitting rigidly coupled to the cargo platform, and wherein the upper connector is pivotally connected to the support fitting to allow pivotal movements of the anti-rattle device between stowed and operative positions.
15. The cargo aircraft according to claim 14 , wherein
the support fitting comprises a pair of spaced apart apertured connection lobes, and wherein
the upper connector comprises an eyelet connector at one end thereof which is positioned between and pivotally connected to the connection lobes.
16. The cargo aircraft according to claim 15 , further comprising a bolt and nut assembly pivotally connecting the eyelet connector and the connection lobes.
17. The cargo aircraft according to claim 14 , wherein the upper connector comprises an upper clevis connector which is pivotally connected to the support fitting.
18. The cargo aircraft according to claim 17 , wherein the support fitting includes an inverted U-shaped support fitting.
19. The cargo aircraft according to claim 18 , wherein the inverted U-shaped support fitting comprises an apertured boss extending inwardly therefrom which is sized and configured to be received in the lower clevis connector, wherein insertion of the primary quick-disconnect pin through the clevis connector and the apertured boss retains the anti-rattle device in the stowed position thereof.
20. The modular auxiliary fuel tankage system according to claim 1 , wherein one of the upper and lower fittings comprises a pair of separated first fitting bosses, and another of the upper and lower fittings comprises a second fitting boss received between and pivotally connected to the first fitting bosses by the bolt assembly.