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| SECTION B– PERFORMING OPERATIONS; TRANSPORTING |
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| B 64 | AIRCRAFT; AVIATION; COSMONAUTICS |
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| B 64 B | LIGHTER-THAN-AIR AIRCRAFT (ground installations for aircraft in general B 64 F) |
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1/ | 00 | Lighter-than-air aircraft |
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1/ | 02 | . | Non-rigid airships (B 64 B 1/58 takes precedence; balloons B 64 B 1/40) |
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1/ | 04 | . | . | the profile being maintained by ties or cords connecting opposite surfaces |
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1/ | 06 | . | Rigid airships; Semi-rigid airships (B 64 B 1/58 takes precedence) |
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1/ | 08 | . | . | Framework construction |
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1/ | 10 | . | . | Tail unit construction (B 64 B 1/12 takes precedence) |
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1/ | 12 | . | . | Movable control surfaces |
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1/ | 14 | . | . | Outer covering |
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1/ | 16 | . | . | . | rigid |
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1/ | 18 | . | . | . | Attachment to structure |
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1/ | 20 | . | . | provided with wings or stabilising surfaces |
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1/ | 22 | . | . | Arrangement of cabines or gondolas |
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1/ | 24 | . | . | Arrangement of propulsion plant (B 64 B 1/34 takes precedence) |
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1/ | 26 | . | . | . | housed in ducts |
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1/ | 28 | . | . | . | housed in nacelles |
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1/ | 30 | . | . | . | Arrangement of propellers |
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1/ | 32 | . | . | . | . | surrounding hull |
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1/ | 34 | . | . | . | . | of lifting propellers |
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1/ | 36 | . | . | Arrangement of jet reaction apparatus for propulsion or directional control |
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1/ | 38 | . | . | Controlling position of centre of gravity |
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1/ | 40 | . | Balloons (B 64 B 1/58 takes precedence; toy balloons A 63 H 27/10) |
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1/ | 42 | . | . | Construction or attachment of stabilising surfaces |
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1/ | 44 | . | . | adapted to maintain predetermined altitude |
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1/ | 46 | . | . | associated with apparatus to cause bursting |
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1/ | 48 | . | . | . | to enable load to be dropped by parachute |
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1/ | 50 | . | . | Captive balloons |
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1/ | 52 | . | . | . | attaching trailing entanglements |
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1/ | 54 | . | . | . | connecting two or more balloons in superimposed relationship |
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1/ | 56 | . | . | . | stabilised by rotary motion |
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1/ | 58 | . | Arrangements or construction of gas-bags; Filling arrangements (connection of valves to inflatable elastic bodies B 60 C 29/00) |
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1/ | 60 | . | . | Gas-bags surrounded by separate containers of inert gas |
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1/ | 62 | . | . | Controlling gas pressure, heating, cooling, or discharging gas |
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1/ | 64 | . | . | Gas-valve operating mechanisms |
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1/ | 66 | . | Mooring attachments (mooring masts B 64 F 1/14) |
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1/ | 68 | . | Water flotation gear |
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1/ | 70 | . | Ballasting arrangements |
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