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Amphibious dirigible airships

  • US 3,945,589 A
  • Filed: 08/21/1974
  • Issued: 03/23/1976
  • Est. Priority Date: 08/21/1974
  • Status: Expired due to Term
First Claim
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1. A semi-rigid dirigible airship comprising an envelope for containing lifting gas (lighter-than-air), said envelope having a bow which is curved in vertical section for reduction of drag, having a metal bow plate on the bow, the stern of the airship being curved in vertical section for strength but on a shorter radius than that of the bow, a metal stern plate on said stern, an elevator pivotally connected to said stern metal plate, the axis of pivotal connection being substantially horizontal, a plurality of metal ribs attached to the bow plate and connected to the stern plate and extending fore and aft both on the top and on the bottom of the airship and secured to the envelope all along their lengths on top and bottom, said airship having a vertical rudder for steering starboard and port, propulsion means for said airship, at least one ballonet in said envelope to take in and exhaust air to keep the pressure up and not too great, a pair of separate cars one on either side of the airship underneath, cords inside said envelope extending from and attached to the upper part of the airship and attached to the cars for the support thereof, the cars being floatable for landing the airship on water, at least one car having a water ballast compartment, a scoop at the forward end of such car to take in water to the ballast compartment, and a valve to discharge the water.

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