Part 6 (1/2)
A little lower than this deck there projected on each side a broad, oblong, slightly curved sheet of metal, very thin, but strengthened by means of wire braces, till it was as rigid as a plate of solid steel, although it only weighed a few ounces. These air-planes worked on an axis amids.h.i.+ps, and could be inclined either way through an angle of thirty degrees. At the pointed stern there revolved a powerful four-bladed propeller, and from each quarter, inclined slightly outwards from the middle line of the vessel, projected a somewhat smaller screw working underneath the after end of the air-planes.
The hull contained four small double-cylinder engines, one of which actuated the stern-propeller, and the other three the fan-wheels and side-propellers. There were, of course, no furnaces, boilers, or condensers. Two slender pipes ran into each cylinder from suitably placed gas reservoirs, or power-cylinders, as the engineer called them, and that was all.
Arnold deftly and rapidly put the parts together, continuing his running description as he did so, and in a few minutes the beautiful miracle of ingenuity stood complete before the wondering eyes of the Circle, and a murmur of admiration ran from lip to lip, bringing a flush of pleasure to the cheek of its creator.
”There,” said he, as he put the finis.h.i.+ng touches to the apparatus, ”you see that she is a combination of two principles--those of the Aeronef and the Aeroplane. The first reached its highest development in Jules Verne's imaginary ”Clipper of the Clouds,” and the second in Hiram Maxim's Aeroplane. Of course, Jules Verne's Aeronef was merely an idea, and one that could never be realised while Robur's mysterious source of electrical energy remained unknown--as it still does.
”Maxim's Aeroplane is, as you all know, also an unrealised ideal so far as any practical use is concerned. He has succeeded in making it fly, but only under the most favourable conditions, and practically without cargo. Its two fatal defects have been shown by experience to be the comparatively overwhelming weight of the engine and the fuel that he has to carry to develop sufficient power to rise from the ground and progress against the wind, and the inability of the machine to ascend perpendicularly to any required height.
”Without the power to do this no air-s.h.i.+p can be of any use save under very limited conditions. You cannot carry a railway about with you, or a station to get a start from every time you want to rise, and you cannot always choose a nice level plain in which to come down. Even if you could the Aeroplane would not rise again without its rails and carriage. For purposes of warfare, then, it may be dismissed as totally useless.
”In this machine, as you see, I have combined the two principles.
These helices on the masts will lift the dead weight of the s.h.i.+p perpendicularly without the slightest help from the side-planes, which are used to regulate the vessel's flight when afloat. I will set the engines that work them in motion independently of the others which move the propellers, and then you will see what I mean.”
As he spoke, he set one part of the mechanism working. Those watching saw the three helices begin to spin round, the centre one revolving in an opposite direction to the other two, with a soft whirring sound that gradually rose to a high-pitched note.
When they attained their full speed they looked like solid wheels, and then the air-s.h.i.+p rose, at first slowly, and then more and more swiftly, straight up from the table, until it strained hard at the piece of cord which prevented it from reaching the roof.
A universal chorus of ”bravas” greeted it as it rose, and every eye became fixed on it as it hung motionless in the air, sustained by its whirling helices. After letting it remain aloft for a few minutes Arnold pulled it down again, saying as he did so--
”That, I think, proves that the machine can rise from any position where the upward road is open, and without the slightest a.s.sistance of any apparatus. Now it shall take a voyage round the room.
”You see it is steered by this rudder-fan under the stern propeller.
In the real s.h.i.+p it will be worked by a wheel, like the rudder of a sea-going vessel; but in the model it is done by this lever, so that I can control it by a couple of strings from the ground.”
He went round to the other side of the table while he was speaking, and adjusted the steering gear, stopping the engines meanwhile. Then he put the model down on the floor, set all four engines to work, and stood behind with the guiding-strings in his hands. The spectators heard a louder and somewhat shriller whirring noise than before, and the beautiful fabric, with its s.h.i.+ning, silvery hull and side-planes, rose slantingly from the ground and darted forward down the room, keeping Arnold at a quick run with the rudder-strings tightly strained.
Like an obedient steed, it instantly obeyed the slightest pull upon either of them, and twice made the circuit of the room before its creator pulled it down and stopped the machinery.
The experiment was a perfect and undeniable success in every respect, and not one of those who saw it had the slightest doubt as to Arnold's air-s.h.i.+p having at last solved the problem of aerial navigation, and made the Brotherhood lords of a realm as wide as the atmospheric ocean that encircles the globe.
As soon as the model was once more resting on the table, the President came forward and, grasping the engineer by both hands, said in a voice from which he made but little effort to banish the emotion that he felt--
”Bravo, brother! Henceforth you shall be known to the Brotherhood as the Master of the Air, for truly you have been the first among the sons of men to fairly conquer it. Come, let us go back and talk, for there is much to be said about this, and we cannot begin too soon to make arrangements for building the first of our aerial fleet. You can leave your model where it is in perfect safety, for no one ever enters this room save ourselves.”
So saying the President led the way to the Council-chamber, and there, after the _Ariel_--as it had already been decided to name the first air-s.h.i.+p--had been christened in antic.i.p.ation in twenty-year old champagne, the Circle settled down at once to business, and for a good three hours discussed the engineer's estimate and plans for building the first vessel of the aerial fleet.
At length all the practical details were settled, and the President rose in token of the end of the conference. As he did so he said somewhat abruptly to Arnold--
”So far so good. Now there is nothing more to be done but to lay those plans before the Chief and get his authority for withdrawing out of the treasury sufficient money to commence operations. I presume you could reproduce them from memory if necessary--at any rate, in sufficient outline to make them perfectly intelligible?”
”Certainly,” was the reply. ”I could reproduce them in _fac simile_ without the slightest difficulty. Why do you ask?”
”Because the Chief is in Russia, and you must go to him and place them before him from memory. They are far too precious to be trusted to any keeping, however trustworthy. There are such things as railway accidents, and other forms of sudden death, to say nothing of the Russian customs, false arrests, personal searches, and imprisonments on mere suspicion.
”We can risk none of these, and so there is nothing for it but your going to Petersburg and verbally explaining them to the Chief. You can be ready in three days, I suppose?”