A new compass indicates when the airplane is upside down
Item
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Title (Dublin Core)
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A new compass indicates when the airplane is upside down
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Article Title and/or Image Caption (Dublin Core)
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It Tells the Aviator if He's Upside Down
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extracted text (Extract Text)
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when an aviator gets into a fog,
his position is perilous. Since
he can’t see the ground he doesn’t
know whether he is on an even keel or
not. He has even been known to fly
upside down for a short time and not
know it. >
Dr. James Pentz, of New York, has
invented a compass that not only tells
the aviator his north and south, but
also tells him whether he is upside
down. The compass-card rests freely
on a surface of kerosene inclosed in a
glass globe. Liquid will not stand on
its head for any length of time, but will
settle down in the position gravity
meant it to.
In his first attempt Dr. Pentz at-
tached the compass-card to the globe,
which deprived it of the necessary free-
dom. He complained of this to his
sympathetic wife, who pulled a hair-
pin from her hair, drove it into a
cork, and floated it, thus helping to
solve the problem.
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Language (Dublin Core)
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eng
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Date Issued (Dublin Core)
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1919-05
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pages (Bibliographic Ontology)
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67
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Rights (Dublin Core)
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Public domain (Google digitized)
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Archived by (Dublin Core)
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Davide Donà
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Marco Bortolami (editor)
Popular Science Monthly, v. 94, n. 5, 1919
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