| 31. | Goodyear Airship Operations has officially planned to start production of Zeppelin NT semi-rigid airships beginning in 2013.
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| 32. | Within two years of each other contributed to the cancellation of the Navy s rigid airship program.
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| 33. | In 1921, the rigid airship " R38 " was sold by Britain to the United States Navy.
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| 34. | Rigid airships are often commonly called Zeppelins.
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| 35. | He created the first flyable rigid airship.
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| 36. | The enormous, rigid airship had become a familiar but still fascinating sight along the New Jersey coast.
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| 37. | It was founded on 16 November 1909 and operated Zeppelin rigid airships manufactured by the Luftschiffbau Zeppelin Corporation.
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| 38. | In the'30s, however, all that changed when Germany built the largest rigid airship ever constructed, the 804-foot Hindenburg.
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| 39. | Their semi-rigid airships were considered useful for military purposes and several were ordered by the French War Ministry.
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| 40. | :: : Tagishsimon is correct about the separate bags of gas with dirigibles / zeppelins ( rigid airships ).
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