Goodyear-Zeppelin ZRS-4 ‘˜Akron’, 1931: The last two American rigids were designed for the US Navy by ex-Zeppelin engineers. Despite this, they differed in important respects from German practice with deep unbraced main frames like R101. Designed for helium, their eight German Maybach engines were enclosed within the hull and drove swivelling propellers. Their operational role depended on carriage of three-or four fighter/dive bombers for which there was hangar space within the hull. AKRON and her sister ship, MACON, were both lost in flying accidents.
Zeppelin LZ129 ‘Hindenburg’, 1936: The first of the last two Zeppelins built, which were basically of similar design. HINDENBURG and her sister ship, LZ 130 GRAF ZEPPELIN II, were powered by four diesel engines. HINDENBURG was intended for the North Atlantic route on which she operated during her 14 months career, as well as making a few flights to South America. HINDENBURG was destroyed by a disastrous hydrogen fire while landing at Lakehurst in the United States on 6 May 1937. This ended Zeppelin passenger operations.