The Air and Its Mysteries |
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Page 237
... airship . From 1851 onwards various experimenters had toyed with the idea of a navigable balloon , but it was the advent of the internal combustion engine that made the airship a practical proposition , and 1898 saw the experiments of ...
... airship . From 1851 onwards various experimenters had toyed with the idea of a navigable balloon , but it was the advent of the internal combustion engine that made the airship a practical proposition , and 1898 saw the experiments of ...
Page 241
... airships , the buoy- ancy of which is greatly influenced by the temperature of the air . For a successful landing , the navigator of an airship must know what temperature he is descending into , and when riding at the mast he must ...
... airships , the buoy- ancy of which is greatly influenced by the temperature of the air . For a successful landing , the navigator of an airship must know what temperature he is descending into , and when riding at the mast he must ...
Page 244
... airship did not Safe flying height 2,400 feet 2,000 feet 1,500 feet Ground winds affected up to this level 500 ft . Fig . 21. Loss of R 101 answer , but plunged forward helplessly to her doom ( Fig . 21 ) . Gliders , on the other hand ...
... airship did not Safe flying height 2,400 feet 2,000 feet 1,500 feet Ground winds affected up to this level 500 ft . Fig . 21. Loss of R 101 answer , but plunged forward helplessly to her doom ( Fig . 21 ) . Gliders , on the other hand ...
Contents
THE DROPS THAT WATER THE EARTH | 82 |
THE THUNDERSTORM | 109 |
WEATHER | 139 |
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able actual amount appear atmosphere aurora balloon become called carried caused changes climate clouds cold colour comes connected cosmic rays currents depression develop direction discharge earth effect electric especially experience fact fall feet fire flash flying force give given ground halo heat height hour inches instance interesting kind known land layer less light lines lower means measured miles moon mountain move nature nearly night observations occur owing oxygen passing Plate position present pressure probably produced rain rays reached reason received record reflected regions reports result rise seems seen ship shown side snow sometimes sound South space speed storm summer surface temperature things thunder tion tropical upper usually visible warm waves weather wind wings winter