The Flying Boys in the Sky

“What was their idea of aerostation?”

“They learned from many experiments that a light globe filled with hot air will rise because its weight is less than the surrounding atmosphere, just as a cork or bit of pine comes to the surface of water. They made a globular ball, thirty-five feet in diameter, of varnished silk, and in June, 1783, in the presence of an immense crowd at Annonay built a fire under the mouth on the lower side. Soon after when the ropes were loosened, the balloon mounted upward for more than a mile, then was carried to one side by a current of air and as the vapor within cooled, came gently down to earth again.

“The incident caused a sensation and Paris subscribed money for manufacturing hydrogen, a very buoyant gas to take the place of hot air. The brothers sent up such a balloon in Paris in the latter part of August. It sailed aloft for half a mile, finally drifted out of sight and came down fifteen miles from the starting point.”

“Did it carry any passenger?” asked the Professor.

“No; the time had not come for that venture, but soon after the brothers sent up a second hot air balloon at Versailles, in the presence of the king and queen. A wicker cage was suspended below and in it were a duck, a rooster and a sheep, all of which showed less excitement than the cheering thousands. It rose about a fourth of a mile, and eight minutes after leaving the ground descended two miles away.”

“Who was the first man to go up in a balloon?” asked Abisha Wharton.

“I don’t remember his name; can you tell me, Professor?”

“Pilatre de Rozier, whose ascent was made on the 15th of October, 1783, in an oval balloon constructed by the Montgolfiers. It was not quite fifty feet in diameter and half again as high. A circular wicker basket was suspended beneath, and under the neck of the balloon in the center was an iron grate or brazier supported by chains, the whole structure weighing sixteen hundred pounds. M. de Rozier fed the flames with straw and wood and thus kept the air sufficiently heated to lift him eighty-four feet, where held by ropes, the balloon remained suspended for four and a half minutes and then gently came back to earth.

“This incident blazed the way for successful aerostation. M. de Rozier accomplished higher and more durable ascents and occasionally took a passenger with him. We must remember, however, that in all these instances, the balloon was restrained by ropes and could not wander off. The aeronauts chafed under such restriction, and on November 21, 1783, M. de Rozier and the Marquis d’Arlandes cut loose from the earth in front of a royal palace in the Bois de Boulogne, it being the first time such a thing was ever done. The ascent lasted not quite half an hour, when the aeronauts came safely down in a field five miles distant from the starting point.” 1

CHAPTER IX

THE PROFESSOR TALKS ON AVIATION (Continued.)

Professor Morgan continued: “Thus far the aeronauts had used hot air with which to make their ascents, but the fire under the balloon was always dangerous and more than one fatal accident resulted therefrom. Hydrogen gas was far better, but more costly. Public subscriptions enabled two brothers named Robert, assisted by M. Charles, to construct a spherical balloon, twenty-eight feet in diameter, the silk envelope being covered with varnish, and the upper half inclosed in a network which supported a hoop that encircled the middle of the sphere. A boat-like structure dangled a few feet below the mouth, and was attached to the hoop, while a safety valve at the apex prevented bursting through expansion of the gas as the balloon climbed the sky.

“This structure was inflated with hydrogen gas in the Garden of the Tuileries, Paris, on the first of December, 1783. M. Charles and one of the Roberts seated themselves in the car, provided with extra clothing, provisions, sand bags for ballast, a barometer and a thermometer, and gave the word to let go. The balloon soared swiftly, the aeronauts waving hands and hats in response to the cheers of the multitudes below. The ascent was a success in every respect. Having drifted thirty miles from Paris, the balloon safely descended near Nesle. There was so much gas left that the enthusiastic M. Charles decided to go up again, after parting with his companion. He climbed nine thousand feet and then by the dexterous use of his ballast came to earth again without the least jar.

“The impulse thus given to ballooning spread to other countries and it would be idle to attempt any record of their efforts. It may be said that for nearly a hundred years little or no progress was made in aerostation. Then came the second stage, the construction of dirigible or manageable balloons. All the structures which had hitherto left the earth were wholly under control of air currents, as much as a chip of wood is under the control of the stream into which it is flung. People began to experiment with a view of directing the course of the ships of the sky. While it was impossible to make headway against a gale or strong wind, it seemed that the aeronaut ought to be able to overcome a moderate breeze. The first attempt was by means of oars and a rudder, but nothing was accomplished until 1852, when Giffard used a small engine, but the difficulty of constructing a light motor of sufficient power checked all progress for awhile. It could not do so for long, however, as the inventive genius of mankind was at work and would not pause until satisfied. One of Giffard’s stupendous ideas was a balloon more than a third of a mile long with an engine weighing thirty tons, but the magnitude and expense involved were too vast to be considered.

“It would be tedious to follow the various steps in dirigible ballooning. It was not until 1882, that the Tissandier brothers, Gilbert and Albert – Frenchmen – built a dirigible cigar-shaped balloon substantially on the old lines, but it could not be made to travel more than five miles an hour in a dead calm, and was helpless in a moderate wind. None the less their attempts marked an epoch, for they introduced an electric motor. The ‘La France,’ when constructed some time later, was a hundred and sixty-five feet long, twenty-seven feet at its greatest diameter, and had a capacity of sixty-six thousand cubic feet. Many changes and improvements followed and an ascent was made in August, 1884, during which the balloon traveled two and a half miles, turned round and came back in the face of a gentle breeze to its starting point, the whole time in the air being less than half an hour. This was the first exploit of that nature.

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1

It is well to bear the following distinctions in mind: aerostation is the art of flying in a balloon; when the balloon is equipped with motor and propellers so as to be navigable, it is dirigible; an aerocar is any kind of a flying machine; an aeronaut is any one who navigates the air in a balloon; an aeroplane is a flying machine which is heavier than air; a monoplane is a one-planed and a biplane a two-planed flying machine; a triplane consists of three superposed planes; a quadruplane of four planes; airmen are either aeronauts or aviators; aviation is the art of flying in an aeroplane and an aviator is one who so flies; aeronef is an aeroplane as defined by International Congress; a hangar corresponds to a garage for an automobile; ornithopter is a heavier-than-air machine, with wings upon which it depends for support and propulsion; petrol is the European name for gasoline.