Airgun

“ This time the artillery preparation won’t be insufficient.
We have guns, little and big, of every kind, of every caliber, from the little howitzers set low on their plates with their large muzzles like those we used to see on the terrace of the Invalides up to the great naval guns, long, lean and sharp, like a cigar, monumental guns of unheard-of size mounted on gigantic platforms, with covered turrets, new and odd foreign cannon, long as a train and mounted on rails.
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And there are projectiles such as the wildest imagination could not dream of. ”

“ As soon as the blade of the propeller passes the barrel the system liberates the firing mechanism of the gun until another blade passes, or is about to pass, when the bullets that would pierce it are held up, just for that fraction of a second, again. So it goes on, like clockwork. You have noticed that on the new planes all the pilot has to do when he wants to fire his machine-gun is to press a small lever which is set, on most planes, in the handle of the directing lever. ”

“ In the case of the gun the gas is formed almost instantly and in such quantity that it has to drive the bullet out of the barrel to make room for itself. In the cartridge that our army uses, only about a tenth45 of an ounce of smokeless powder is used, but this builds up so heavy a pressure of gas that the bullet is sent speeding out of the gun at a rate of half a mile a second. It travels so fast that it will plow through four feet of solid wood before coming to a stop. ”

“ When the pilot of an Aviatik launched himself to the rescue, all the ammunition of my carabine was exhausted. I had one cartridge left in my automatic revolver, and not a single bomb with which to return the compliments of the German's mitraille. My petrol-tank had been perforated. My single bullet missed him. The duel was too unequal, so I withdrew from the field, leaving him to cavalier the Flying Pig. We may meet again upon terms more equal, when French military aviators fight with machine-guns. And now to business. ”

“ The gun is a remarkable object among the rest of our artillery. Its barrel, immensely long but very slender, has a well-bred, aristocratic look compared with the thick noses of our field-guns. It drives its forty-five pound shell about seven miles, and shoots, I am told, with perfect accuracy. It is an enlarged edition of the beautiful little twelve-pounders which we have hitherto been using, and which exceed the range of our fifteen-pounder field-guns by about a half. Why should naval guns be so vastly superior to land ones? ”

“ It is the rapid and devious variation which so baffles the gunner, who unless he be highly skilled and patient, is apt to commence to fire wildly after striving for a few moments, and in vain, to pick up the range; he trusts to luck or depends upon blind-shooting, which invariably results in a waste of ammunition.
A gun, to be of tangible destructive efficiency when directed against aircraft, especially those depending upon the gas-bag for equilibrium, must be of special design. ”

“ A cloud of smoke hung over me for a second, and, throwing my empty gun on one side, I put my hand behind me for a spare rifle. I felt the welcome barrel pushed into my hand at the same moment that I saw the infuriated head of the elephant with ears cocked charging through the smoke! It was the work of an instant. I had just time to cock the two-ounce rifle and take a steady aim. The next moment we were in a cloud of smoke, but as I fired, I felt certain of her. The smoke cleared from the thick bushes, and she lay dead at SIX FEET from the spot where I stood. ”

“ A species of gun charged with air instead of powder.
The air-gun, although long known, has never been much used, as its slight report is the only advantage it can possess over fire-arms, while its danger and inefficiency are admitted. Fatal accidents have occurred in charging it, and every attempt to remedy the danger has been unsuccessful. In the old principle, the globe or ball which forms the receiver has frequently blown up while the air was being pumped in, and loss of life or severe injury resulted. ”

“ By chance I glanced into the bottom of the cockpit and on the floor my eyes caught sight of a Very pistol which had been left in the plane by the observer on the previous mission whose duty it had been to find the front line of our advanced troops.
A Very pistol is a gun resembling an ordinary pistol, except that it has a wide barrel. It is used to eject brilliant fire rockets as a signal from the 157airplane to the infantry. ”

“ So far, we have talked only of the big guns, but in a modern battle the field-gun plays a very important part. This fires a shell that weighs between fourteen and eighteen pounds and is about three inches in diameter. The shell and the powder that fires it are contained in a cartridge that is just like the cartridge of a shoulder rifle. These field-pieces are built to be fired rapidly. The French 75-millimeter gun, which is considered one of the best, will fire at the rate of twenty shots per minute, and its effective range is considerably over three miles. ”

“ For this purpose the artillery has at its disposal two types of projectile, common (or rather, high explosive) shell and shrapnel, and two fuzes, “time” and “percussion” (see Ammunition) . The actual process of coming into action may be described in a few words. The gun is, at or near its position in action, “unlimbered” and the gun limber and team sent back under cover. Ammunition for the gun is first taken from the wagon that accompanies it, as it is very desirable to keep the limbers full as long as possible, in case of emergencies such as that of a temporary separation from the wagon. ”

“ They continued their "giddy-go-round," and a dozen of the Huns at top speed, with engines full out and machine-guns rattling and ripping out a storm of tracer bullets in streaking pencil-lines of flame and blue smoke, came hurtling down like live thunderbolts. The sight alone might well have been a terrifying one to the Fo-Fum men, and the sharp, whip-like smacks and cracks about them of the explosive bullets which began to find their mark on fabric or frame would also have been upsetting to any but the steadiest nerves. ”

“ Meantime one man has been training the gun sideways and another has been raising or lowering it, independently of the man who has been setting the deflection and fixing the range. When the cross-wires in the gun pointer's telescope are right on the bullseye and it is time to fire he pulls a trigger and the electrical apparatus sends a lightning impulse into the powder, there is a roar, a thin cloud of smoke from the primer, a flash and you look for the splash to see if it is a hit. ”

“ In weapons which do not call for a long range, as revolvers and pistols, a perceptible interval is left between the chamber and barrel, through which much gas escapes; but in rifles, which have range and penetration as principal objects, there is prima facie ground for preferring a muzzle-loader. The gas, however, is far from pure as generated in the barrel, for much water is produced and held in suspension, while there is also a solid residuum consisting of unburned materials of the powder. ”

“ Something which was hidden away in the gunpowder ceases to be concealed when it is changed into smoke and vapor, and becomes active enough to be able to drive the bullet out of the muzzle of the gun with a force that carries it through the air for a mile, and perhaps then buries it deep in the ground, or in a plank of wood. This is an instance of the way in which chemists produce motion, by changing the state and condition of material substance. ”

“ Each barrel has its own breech-plug, striker, spring, and extractor, and each fires independently of the rest, so that all are not out of action together. The gun has a swivelled mount easily elevated and trained, and the steel frames take up the force of the discharge. In rapid firing one gunner [Pg 99] can work the firing-handle while another lays and alters the direction. The firing is operated by a lever working backwards and forwards by hand, and the gun can be discharged at the rate of 600 rounds per minute. ”

“ But, after all, she's only the natural outcome of the air-gun, which has been known for generations. An air-gun is shaped like a rifle, with a hollow boiler or reservoir of power. You force into the reservoir by means of a condensing syringe as much air-power as it will hold. ”

“ It is important to understand clearly that any intermediate course is fatal. Either the bullet must be definitely resisted and stopped, or it must be let through with the least possible resistance; it is for the designer to decide in respect of each component which policy he will adopt. The thickness of the armour required will depend very much upon the minimum altitude at which, in the presence of the enemy, it is desired to fly; also upon the particular type of rifle and ammunition brought to bear. ”

“ The effective use of small-bore fire-arms against aircraft was made possible by two inventions, produced under the stress of the war itself, that is to say, of the tracer bullet, which leaves behind it in the air a visible track of its flight, and of the incendiary bullet, which sets fire to anything inflammable that it hits. ”

“ The airplane guns required armor-piercing bullets for use against armored planes, incendiary bullets to ignite the hydrogen of the enemy's balloon or to fire the gasoline escaping through the wound in the hostile airplane's fuel tank, and tracer bullets to direct the aim of the aerial gunner. Other equipment for the airman included shot counters, to tell him instantly what quantity of ammunition he had on hand, and gun sights, ingeniously contrived to correct his aim automatically for the relative speed and direction of the opposing plane. ”

“ MACHINE GUNS IN AIRCRAFT
Various attempts have been made to mount machine guns on aeroplanes, but the operator, in his narrow seat, has hardly space to point a machine gun in any direction except straight to his front. The American Curtis machine gun exhibited at Olympia is the most efficient form yet produced, but at present the airman seems to prefer an automatic rifle. Even in the early days of the war, Sir John French was able to report that British airmen had disposed of no less than five of the enemy’s aircraft with this weapon. ”

“ In sporting guns snow may accidentally get into the muzzle or a lump of dirt may “somehow” get in so as to fill the bore, and when the gun is fired, it will probably, yes, most certainly be blown off or blown open where the obstruction exists; the muzzle of a gun being thrust into water for a couple of inches or more will have like effect. The gas formed by burning the powder finds no outlet of escape, and the whole expansive force concentrates itself on the weakest portion of the barrel, and as a result it is forced apart. ”

“ Indeed, the manifest inferiority of the air-gun to the rifle, would, independently of its danger, prevent it from coming into general use. As an instrument, it is extremely troublesome to shoot with, and liable to constant derangement. Its power is very weak, and in accuracy of aim the rifle is far superior. Even the advantage of slight report in the discharge is now comparatively done away with, in consequence of the recent introduction of the small-bore rifles for rook and rabbit shooting; which, from the trifling quantity of powder used in charging, are scarcely louder than the air-gun. ”

“ The common forms of air-gun, which are merely toys, are charged by compressing a spiral spring, one end of which forms a piston working in a cylinder; when released by a pull on the trigger, this spring expands, and the air forced out in front of it propels the bullet. ”

“ Old guns which have been laid by will not uncommonly be found spiked, by having a common nail driven into the vent. If efficient tools are at hand this may be drilled out, if not, put a charge of powder in the gun, bore a gimlet hole in one of your wooden wads, through which pass a loosely-twisted string well impregnated with dissolved gunpowder, and afterwards dried. Cut the end of your prepared string just at the muzzle of the gun, light it, and get out of the way, when the explosion, which soon takes place, will not unfrequently expel the spike. ”

“ Tracer bullets for aircraft guns, it might be observed, are balls of fire which enable the pilot to see the course his machine gun bullets are taking, so he may correct his fire.
"Well, how about you now?" asked Tom, as he added these useful supplies to his ammunition.
"I guess we're ready to start," replied Jack.
They climbed into their machines, each pilot using a single-seat, swift-flying craft, equipped with a Lewis machine gun. ”

“ MACHINE GUNS. The name of machine guns has been applied to arms which may be regarded as in some respects intermediate between cannons and rifles, since in certain particulars they partake of the nature of both. Like the former, they are fired from a stand or carriage, and in some of their forms require more than one man for their working: in the calibre of their barrels and the weight of their projectiles, they are assimilated to the rifle, but they are capable of pouring forth their missiles in a very rapid succession—so rapid indeed as practically to constitute volley firing. ”

“ Nothing prevents them from obtaining the required information, and they frequently return with rifle or shrapnel bullets through their aeroplane or even their clothing, without considering such, to them, ordinary incidents as worth mentioning. To-day I watched for a long time an aeroplane observing for the six-inch howitzers for the Third Division. It was, at times, smothered with hostile anti-aircraft guns, but, nothing daunted, it continued for hours through a wireless installation to observe the fire and indeed to control the Battery with most satisfactory results. ”