Lighter-than-air aircraft

BPERFORMING OPERATIONS TRANSPORTING B64Aviation B64BLIGHTER-THAN AIR AIRCRAFT

B64B1/00Lighter-than-air aircraft

B64B1/005Arrangements for landing or taking-off B64B1/02Non-rigid airships B64B1/04the profile being maintained by ties or cords connecting opposite surfaces B64B1/06Rigid airships Semi-rigid airships B64B1/08Framework construction B64B1/10Tail unit construction B64B1/12Movable control surfaces B64B1/14Outer covering B64B1/16rigid B64B1/18Attachment to structure B64B1/20provided with wings or stabilising surfaces B64B1/22Arrangement of cabins or gondolas B64B1/24Arrangement of propulsion plant B64B1/26housed in ducts B64B1/28housed in nacelles B64B1/30Arrangement of propellers B64B1/32surrounding hull B64B1/34of lifting propellers B64B1/36Arrangement of jet reaction apparatus for propulsion or directional control B64B1/38Controlling position of centre of gravity B64B1/40Balloons B64B1/42Construction or attachment of stabilising surfaces B64B1/44adapted to maintain predetermined altitude B64B1/46associated with apparatus to cause bursting B64B1/48to enable load to be dropped by parachute B64B1/50Captive balloons B64B1/52attaching trailing entanglements B64B1/54connecting two or more balloons in superimposed relationship B64B1/56stabilised by rotary motion B64B1/58Arrangements or construction of gas-bags Filling arrangements B64B1/60Gas-bags surrounded by separate containers of inert gas B64B1/62Controlling gas pressure, heating, cooling, or discharging gas B64B1/64Gas valve operating mechanisms B64B1/66Mooring attachments B64B1/68Water flotation gear B64B1/70Ballasting arrangements