The Dominion of the Air: The Story of Aerial NavigationBacon, John M. (John Mackenzie)
History
The Dominion of the Air: The Story of Aerial Navigation
Bacon, John M. (John Mackenzie)
Aeronautics -- History; Balloons
The leakage might be expected chiefly to occur at the valve in the
head of the balloon, it being extremely difficult to render any form of
mechanical valve gas tight, however carefully its joints be stopped with
luting. On this account, therefore, it was determined that the balloon
should be fitted with what is known as a solid or rending valve,
consisting simply of balloon fabric tied hard and fast over the entire
upper outlet, after the fashion of a jam pot cover. The outlet itself
was a gaping hole of over 2 feet across; but by the time its covering
had been carefully varnished over all leakage was sufficiently
prevented, the one drawback to this method being the fact that the
liberation of gas now admitted of no regulation. Pulling the valve line
would simply mean opening the entire wide aperture, which could in no
way be closed again.
The management of such a valve consists in allowing the balloon to
sink spontaneously earthwards, and when it has settled near the ground,
having chosen a desirable landing place, to tear open the so-called
valve once and for all.
This expedient, dictated by necessity, seeming sufficient for the
purpose at hand, preparations were proceeded with, and, under the
management of Mr. Stanley Spencer, who agreed to act as aeronaut, a
large balloon, with solid valve, was brought down to Newbury gas works
on November 14th, and, being inflated during the afternoon, was full and
made snug by sundown. But as the meteor radiant would not be well above
the horizon till after midnight, the aeronautical party retired for
refreshment, and subsequently for rest, when, as the night wore on, it
became evident that, though the sky remained clear, there would be no
meteor display that night. The next day was overcast, and by nightfall
hopelessly so, the clouds ever thickening, with absence of wind or any
indication which might give promise of a change. Thus by midnight it
became impossible to tell whether any display were in progress or not.
Under these circumstances, it might have been difficult to decide when
to make the start with the best show of reason. Clearly too early a
start could not subsequently be rectified; the balloon, once off, could
not come back again; while, once liberated, it would be highly unwise
for it to remain aloft and hidden by clouds for more than some two
hours, lest it should be carried out to sea.
Happily the right decision under these circumstances was perfectly
clear. Other things being equal, the best time would be about 4 a.m., by
which period the moon, then near the full, would be getting low, and the
two hours of darkness left would afford the best seeing. Leaving, then,
an efficient outlook on the balloon ground, the party enjoyed for some
hours the entertainment offered them by the Newbury Guildhall Club, and
at 4 a.m. taking their seats in the car, sailed up into the calm chilly
air of the November night.
Public-domain text, read in full here on John Shaqi.
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