|  | B |
SECTION B — PERFORMING OPERATIONS

TRANSPORTING

|  | B64 |
AIRCRAFT; AVIATION; COSMONAUTICS

|  | B64B |
LIGHTER-THAN-AIR AIRCRAFT

|  | B64B 1/00 |
Lighter-than-air aircraft

|  | B64B 1/02 |
· | Non-rigid airships (Fulltext... Hierarchy... Expanded...B64B 1/58 takes precedence; balloons Fulltext... Hierarchy... Expanded...B64B 1/40)

|  | B64B 1/04 |
· · | the profile being maintained by ties or cords connecting opposite surfaces

|  | B64B 1/06 |
· | Rigid airships; Semi-rigid airships (Fulltext... Hierarchy... Expanded...B64B 1/58 takes precedence)

|  | B64B 1/08 |
· · | Framework construction

|  | B64B 1/10 |
· · | Tail unit construction (Fulltext... Hierarchy... Expanded...B64B 1/12 takes precedence)

|  | B64B 1/12 |
· · | Movable control surfaces

|  | B64B 1/14 |
· · | Outer covering

|  | B64B 1/16 |
· · · | rigid

|  | B64B 1/18 |
· · · | Attachment to structure

|  | B64B 1/20 |
· · | provided with wings or stabilising surfaces

|  | B64B 1/22 |
· · | Arrangement of cabins or gondolas

|  | B64B 1/24 |
· · | Arrangement of propulsion plant (Fulltext... Hierarchy... Expanded...B64B 1/34 takes precedence)

|  | B64B 1/26 |
· · · | housed in ducts

|  | B64B 1/28 |
· · · | housed in nacelles

|  | B64B 1/30 |
· · · | Arrangement of propellers

|  | B64B 1/32 |
· · · · | surrounding hull

|  | B64B 1/34 |
· · · · | of lifting propellers

|  | B64B 1/36 |
· · | Arrangement of jet reaction apparatus for propulsion or directional control

|  | B64B 1/38 |
· · | Controlling position of centre of gravity

|  | B64B 1/40 |
· | Balloons (Fulltext... Hierarchy... Expanded...B64B 1/58 takes precedence; toy balloons Fulltext... Hierarchy... Expanded...A63H 27/10)

|  | B64B 1/42 |
· · | Construction or attachment of stabilising surfaces

|  | B64B 1/44 |
· · | adapted to maintain predetermined altitude

|  | B64B 1/46 |
· · | associated with apparatus to cause bursting

|  | B64B 1/48 |
· · · | to enable load to be dropped by parachute

|  | B64B 1/50 |
· · | Captive balloons

|  | B64B 1/52 |
· · · | attaching trailing entanglements

|  | B64B 1/54 |
· · · | connecting two or more balloons in superimposed relationship

|  | B64B 1/56 |
· · · | stabilised by rotary motion

|  | B64B 1/58 |
· | Arrangements or construction of gas-bags; Filling arrangements

|  | B64B 1/60 |
· · | Gas-bags surrounded by separate containers of inert gas

|  | B64B 1/62 |
· · | Controlling gas pressure, heating, cooling, or discharging gas

|  | B64B 1/64 |
· · | Gas-valve operating mechanisms

|  | B64B 1/66 |
· | Mooring attachments (mooring masts Fulltext... Hierarchy... Expanded...B64F)

|  | B64B 1/68 |
· | Water flotation gear

|  | B64B 1/70 |
· | Ballasting arrangements