The National Geographic Magazine, Volume 98National Geographic Society, 1951 - Geography Indexes kept up to date with supplements. |
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Page 281
... speed indicator . As our jet plane smoothly gathered momentum , the hand moved up to 510 , to 520 . In a mere training plane we were traveling nearly a hundred miles an hour faster than any American fighting aircraft flew in action in ...
... speed indicator . As our jet plane smoothly gathered momentum , the hand moved up to 510 , to 520 . In a mere training plane we were traveling nearly a hundred miles an hour faster than any American fighting aircraft flew in action in ...
Page 288
... speed in mere miles per hour , each plane now has its " Mach number . " Mach 1 indicates the speed of sound ; Mach .95 is 95 percent of it ; Mach 2 would be twice it ; and so on . Strange Effects at Speed of Sound As they approach Mach ...
... speed in mere miles per hour , each plane now has its " Mach number . " Mach 1 indicates the speed of sound ; Mach .95 is 95 percent of it ; Mach 2 would be twice it ; and so on . Strange Effects at Speed of Sound As they approach Mach ...
Page 420
... speed now made or yet to come ... from 10 to 85 R.P.M. - 7 , 10 or 12 inch ! It's all done with two simple controls a child can operate . Just dial one control for record speed ... 33 % , 45 , 78 or any other speed from 10 to 85 ...
... speed now made or yet to come ... from 10 to 85 R.P.M. - 7 , 10 or 12 inch ! It's all done with two simple controls a child can operate . Just dial one control for record speed ... 33 % , 45 , 78 or any other speed from 10 to 85 ...
Contents
Copraship Voyage to Fijis Outlying Islands By Marjory C Thomas 121 | viii |
Delmarva Gift of the Sea By Catherine Bell Palmer With 21 illustrations in color | xix |
Largescale Western Europe Map First in New National Geographic Series Text accom | xxviii |
Copyright | |
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