The National Geographic Magazine, Volume 90National Geographic Society, 1946 - Geography Indexes kept up to date with supplements. |
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Page 403
... plane without human control on any desired course . You need only push a few buttons to set this automatic mechanism to do what you desire . It will release the brakes , take the plane into the air , retract the wheels , put the plane ...
... plane without human control on any desired course . You need only push a few buttons to set this automatic mechanism to do what you desire . It will release the brakes , take the plane into the air , retract the wheels , put the plane ...
Page 408
... plane , pull the ripcord of your para- chute , and float gently to earth . For some mysterious reason parachutes at high altitudes open with a tremendous shock , 40 or 50 times the force of gravity . This shock is enough to knock a man ...
... plane , pull the ripcord of your para- chute , and float gently to earth . For some mysterious reason parachutes at high altitudes open with a tremendous shock , 40 or 50 times the force of gravity . This shock is enough to knock a man ...
Page 683
... plane , sparked the motor with the dry - cell batteries , and spun the propeller . As the little engine began to roar , he stepped back and played out wire from the reel . The three - foot plane took off smoothly and rose till it was ...
... plane , sparked the motor with the dry - cell batteries , and spun the propeller . As the little engine began to roar , he stepped back and played out wire from the reel . The three - foot plane took off smoothly and rose till it was ...
Contents
France | 12 |
Bat banding | 125 |
Arkansas Resources and Development Committee | 273 |
Copyright | |
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