Gas Bag.A gas container in a rigid airship. Rigid airships are provided with a large number of gas bags (usually about 16) which hold the supporting gas and are anchored within the rigid framework.
317, shows the triangular keel member with the cat-walk by which the crew can travel from one end of the ship to the other and gain access to the different gas bags.
This mixture would prove to be deadly to the airships: the explosive bullets could pierce the Zeppelin's tough outer skin and cause leaks on the inner gas bags.
Huge powered aerostats, characterized by a rigid outer framework and separate aerodynamic skin surrounding the gas bags, were produced, the Zeppelins being the largest and most famous.
 See also: Aircraft, Speed, Airship, Plane, Lift
  
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