Aërial Navigation: A Popular Treatise on the Growth of Air Craft and on Aëronautical MeteorologyZahm, Albert Francis
History
Aërial Navigation: A Popular Treatise on the Growth of Air Craft and on Aëronautical Meteorology
Zahm, Albert Francis
Aeronautics; Meteorology
Some twelve or thirteen years later, in 1867, Le Bris, aided by a
public subscription at Brest, built a second albatross, with which
he made a number of small flights, sometimes riding it himself, and
sometimes replacing his weight by ballast. On one occasion the loaded
bird, held by a light line, rose 150 feet and advanced against the
wind. Suddenly the sailors holding the line observed it slacken, and
saw with amazement the long-winged creature soar forward 600 feet, as
stately and serene as its living prototype. Presently encountering a
sheltered and quiet region of air before some rising ground, it settled
softly to earth in perfect equipoise. But on a subsequent launching
from the same favorable ground, the dumb creature pitched forward and
plunged to the earth where it lay shattered and torn in a hopeless
tangle. Le Bris looked on the wreck in despair, surveying sadly the
remains of his once cherished bird; then sat upon the débris a long
time, his head between his hands, his heart broken, his mind tortured
with anguish. Impoverished, chagrined, derided, he now must abandon
the albatross business. Five years later this intrepid sailor of sea
and air was killed by some ruffians, in 1872, while a constable in his
native place, and after a period of honorable service to the state in
the Franco-Prussian War.
The story is more romantic than instructive, for want of exact data.
To give the experiments their proper value to others, fuller details
of the mechanism should be furnished, and adequate measurements of the
speed and direction of the aërial currents. At one time the sailing
was even, at another, rough, though outwardly the conditions appeared
the same. Apparently the successful flights occurred when the bird was
launched to windward from rising ground, that is, when the current had
an upward slant, to exert a propulsive effort. This species of soaring
has been observed frequently in nature, and has been imitated both with
models and with man-carrying gliders. Nevertheless Le Bris’ experiments
were very remarkable for the time, and, if adequately reported, might
have proved to be of much interest and value to aëronautical science.
Public-domain text, read in full here on John Shaqi.
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