The Project Gutenberg eBook of Hand Grenades, by Major Graham M. Ainslie

The purpose of this work is to assist students of grenade work in acquiring a rapid and complete knowledge of the subject. If the student will refer constantly to the illustrations, which are accurate drawings of grenades now in use, this book may help to elucidate many points which are inadequately treated in any existing work.

In compiling the book, the author has inserted only information absolutely necessary, and has arranged it so simply that a person with a very little previous knowledge of the subject may be able to grasp both the data given, and the principles, and methods herein explained and illustrated.

A grenade is a hollow ball, cylinder, or cube, made of metal or other material, which is filled with some explosive, and burst by means of a fuse, or on impact when it falls among an enemy. Until about the end of the seventeenth century trained soldiers called Grenadiers used grenades which were thrown by hand, but after that date they fell into disuse. In 1899—1900 at the siege of Mafeking they are said to have been used by the besieged, and also in the Russo-Japanese war. In the year 1914, however, the beginning of the great war produced new methods in the employment of infantry in the attack or defense of positions. It was proved that under many conditions infantry armed only with a rifle and bayonet found it impossible to press home an attack or hold a position against troops armed with grenades.

This weapon, handy to use and immensely destructive and demoralizing in its employment, has played a most important part in every successful operation carried out by British troops on the Western front. It has become one of the principal weapons not only in trench warfare, but in the attack and clearing of enemy positions, strong points, villages, and especially in house-to-house and cellar fighting.

GRENADE HAND NO. 1 or General Service

Packing : Grenades are packed six in wooden box with tin containing ten special detonators.

Precautions : Care must be taken in act of throwing that grenade does not strike any object in rear of the thrower.

GRENADE HAND NO. 2

Striker. Brass needle pellet 1½ in. long, conical head, steel needle point, creep spring contained in brass base piece. [Pg 5]

Packing. Grenades are packed ten in a wooden box, with tin containing ten No. 2 detonators.

“GRENADE 303.” SHORT RIFLE NO. 3

Striker. Brass fluted needle pellet 1½ in. long, wasp waisted, conical head, steel needle point and creep spring, contained in brass base piece.

Packing. Grenades packed twenty in wooden box in protecting tins with screw-off lids and four tins containing 20 in. special detonators, rifle, grenades and twenty-two special blank cartridges.

GRENADE HAND NO. 5. MARK I.

Igniter. Special, consisting of a separate unit. Special N.g. cap holder, N.G. rim firing percussion cap, 1¾ in. safety fuse and detonator.

Packing. Grenades are packed twelve in wood box, with a tin containing twelve igniters.

Base plugs into which are screwed 8 in. rods are provided for this grenade to be fired from rifle, a special one being fitted to the rifle for this purpose.

GRENADES HAND NOS. 6 AND 7

Weight. No. 6 or light grenade, 1 lb. complete; No. 7, or heavy grenade, 1 lb. 13 oz.

Igniter. Special friction igniter, length of safety fuse, and service detonator combined.

[Pg 12] Packing. Grenades packed forty in wooden box. Four haversacks with four tins containing ten special igniters. These grenades should always be carried with papier maché caps on.

GRENADE HAND NOS. 8 AND 9

Weight. No. 8 light pattern, 1 lb. 6 oz. complete; No. 9, heavy pattern, 2 lb. complete.

Body. Tin cylinder 2¾ × 1½ in. diameter, inside larger cylinder 3¼ × 3 in. diameter.

Note. The heavy pattern grenade has more shrapnel and less explosive than the light pattern grenade.

GRENADE HAND NO. 12

Body. Tin box 3×5×2 in. A grooved cast-iron plate, ¼ in., forms the front side.

Igniter. Special brass tube consisting of spring and striker held in place by safety pin. Cap and fuse and detonator or Nobel lighter, fuse and detonator.

BATTYE GRENADE

Packing. Grenades packed thirty in wooden box arranged with removable wooden partitions which rest on top of the grenades, to prevent lid coming in contact with the end of the igniters.

PITCHER HAND GRENADE

This grenade is not likely to be reissued. The igniter is described in the Training and Employment of Grenadiers issued by General H. Q., October, 1915.

OVAL GRENADE

Body. ³ ⁄ ₁₆ in. cast-iron, egg-shaped, 3½ in. long × 2¼ in. diameter at middle.

Precautions. The waterproof paper must not be removed before throwing, as composition may get damp, or grenade accidentally lighted.

BALL GRENADE

NEWTON HAND GRENADE

Igniter. Sawed off .303 in. blank cartridge, 1½ in. safety fuse, detonator.

NEWTON RIFLE GRENADE

HAND GRENADE NO. 19

Packing. Grenades are packed twelve in a wooden box, also a tin containing twelve special detonators.

RIFLE GRENADE NO. 20

To Fire :
1, 2, 3, and 4 same as No. 3 rifle grenade,
see p. 7 , Fire Rifle.

Packing. Grenades packed twenty in wooden box, four tins containing five each “special detonators rifle grenade,” and 22 special blank cartridges.

Divisional Grenade Officer and Instructional Staff for Grenade, Stokes Gun, Trench Mortar Schools.

1. Clearing of a Trench to a Flank. They are the bodyguard for the thrower and carrier and must always protect them under any conditions and at all costs.

Note. The latter are not armed against attack at close quarters. The bayonet men work in advance of the thrower and carrier of their squads. They act as trench scouts; that is, they instruct their thrower and carrier how the trench runs and where the dug-outs and side trenches will be met. They will carry their rifles with bayonets fixed, loaded, magazine full. No. 3 and 6 bomb and clear all dug-outs on the way down the trench. The first man throws the bomb, the bayonet man enters the dug-out and completes its work. At the junctions of communication trenches and side trenches they act as trench sentries and observers until relieved by the squads in rear. If necessity arises they assist the thrower by throwing bombs.

2. Frontal Attack against Enemy Positions. They will be in line with, not in advance of the thrower and carrier and will protect them while throwing by snap shooting, or with their bayonets against assault, or a sudden rush by the enemy when at close quarters.

3. Street Fighting and Village Cleaning. They will keep down enemy rifle fire by snap shooting, so as to enable the thrower to work close enough to his objective to throw grenades, and when these have burst, will go forward and complete their work.

No. 3. First Thrower. He throws grenades according to the directions given him by his leader or by his bayonet men. He is a picked man, steady under fire and chosen for his accuracy and length in throwing.

No. 4. The Carrier. He follows close enough in rear of the throwers to keep them supplied with grenades, but must be careful not to crowd them or impede the throwing. He will be prepared to instantly take up the duties of the thrower should he become a casualty.

No. 5. N.C.O. or Leader. He is responsible for his squad and the proper carrying out of the duties given to the squad. He will inspect each man before an attack and see that he has his complete equipment and that he knows the general idea and direction of the attack and the final objective of his squad. He will be responsible for the maintenance of supplies of grenades through his squad to the thrower, and will supervise the automatic filling up of casualties in his squad by men from the squads in the rear. He will indicate the position and progress of his squad in the attack to supporting troops, etc., by means of flags or other signals by day and by colored flares by night.

Nos. 6, 7, 8 and 9. Their duties are the same as Nos. 1, 2, 3 and 4, and are to be considered primarily as carriers until otherwise employed. [Pg 31]

No. 10. Spare Man. He will act, if necessity arises, as leader of his section, to clear side trenches, etc., and will instantly take over the duties of No. 5 should he become a casualty.

No. 11. Sniper. He will act as a sniper by day and a connecting file by night, between his own squad and the squad of troops in rear.

Note. Every man in the grenade squad should be trained to fill the position of any other in the squad.

Explanation of Chart No. A2. The position occupied by grenadiers in an attacking squad has this main point in consideration.

The safety and local protection of each individual in the squad; care should be taken that as far as possible each man has a solid corner of the trench close to him, which he can use as a protection against the bursting effect of enemy grenades, by quickly advancing or retiring around the corner.

The bayonet men are in advance of the thrower, close enough to protect him, and not too far in front as to be in danger of being bombed by him.

The thrower—the actual means of attack—is protected in front by the traverse and in the rear by the corner of the parados. The carrier is close behind the thrower and is protected by two corners. The N.C.O. or leader is where he can best watch the flight of the grenades thrown by the throwers, and is also equally well protected.

Method of Advance. It is usually the endeavor to bomb and clear three bays at a time in advance of the bayonet men. The N.C.O. reports the throwing by the word “Mark,” to indicate a burst in the required bay. On the third mark having been registered, the N.C.O. gives the order, “Bayonet men report.” They immediately advance up the trench to the last bay cleared and report back after examination either “All [Pg 32] clear” or “Enemy holding,” whereupon the N.C.O. gives the order “Advance,” or directs the thrower to bomb the last bay again. This means of advance is continued until the objective is gained.

Island Traverse. The two methods of attack are employed as shown on the chart. It is imperative that the attack must not be allowed to be held up, and should it be found impossible to advance down the trench itself, owing to enfilade fire, the attack must be immediately launched outside the trench, so as to attack the traverse from the rear, in the case of a daylight attack.

Precautions. Care must be taken, especially by the bayonet men in their advance through the trench, that enemy concealed trenches, dug-outs, etc., are not left undiscovered. The sides of trenches and the walls and floors of dug-outs should be carefully examined for concealed entrances or exits.

The Preparation Before an Attack. The following details must be carefully considered:

( c ) The detailing of squads to their special objectives and the arranging for work, carrying wire and demolishing parties for permanent blocks at the final objectives.

( d ) The kind of grenades to be used with a view to facilitating the carrying of same.

( e ) Carrying parties must be told off to insure supplies of grenades reaching the throwers.

( f ) Grenade depots must be built, sign boards arranged for, and clearly marked “Grenade Depot” not only in our own system of trenches, but also the positions told off beforehand where they are to be established in the enemy trenches, or in No Man’s Land immediately previous to the attack.

( g ) Responsible officers and N.C.O.’s should be told off to look after the grenade depots and supply of grenades.

( h ) The position for infantry grenade dumps must be selected and clearly explained to all units taking part in the attack, and special parties told off to collect at these points and carry grenades to nearest depots.

( i ) A traffic system should be arranged and all men must be acquainted with it, and the trenches or lines of travel clearly marked “up traffic,” etc.

No. 1 is the method adopted in daylight attack, the advance not being covered by gas or smoke clouds.

No. 2 is method adopted in night attack and when weather conditions or topographical features of ground covered in the advance allow it.

Attacking squads are allotted positions in lines of infantry immediately opposite their first objectives, and on reaching these positions should immediately commence bombing and clearing the trenches towards their final objectives. In the case of No. 1 the infantry clears [Pg 35] the main trench, but special grenade parties may be told off to assist the infantry in this work, especially when strong points occur in the enemy position.

It is most important that all infantry taking part in an attack should be previously supplied with grenades and this must be considered the first source of supply. Positions designated as infantry grenade dumping positions should be chosen and known to the infantry at which they dump their grenades in their advance on the enemy positions. These positions should be close to the position to be captured and held.

In order to hold positions captured from the enemy it is imperative that grenade storming parties hold their final objectives at all costs, and until the positions to be permanently held have been consolidated.

Trench storming parties should kill or drive back the hostile occupants of a trench as quickly as possible, clear as much of the enemy trench as has been ordered, and then hold the portion cleared with as small loss as possible to themselves. It must be remembered that in trench clearing, and especially in deep and narrow trenches, only the head of the attacking party can directly kill, and seldom more than one man can throw at a time. Therefore it is essential that a constant supply of grenades reaches the thrower and that the places of casualties are automatically filled by reinforcements. Men must be trained until they can do this either by day or at night time.

Advance. Movement is rapid until contact with the enemy is obtained. Once contact is established it must be maintained and pressed home. A retreating enemy must be given no time to re-establish a defensive attitude, corners must be worked carefully and bays and straight pieces of trench rushed. The bayonet men will complete the work of the grenades and see that the carrier and thrower will meet with no opposition on their way to new throwing position. The effect of a grenade bursting in a confined space like a trench is tremendous, and though it may not kill it will stun or shock the hostile occupants, and if the bayonet men follow up rapidly they will meet with very little resistance.

Casualties. Every man must be trained to take up the duties of any other man in his squad. They do not necessarily keep to their own [Pg 37] squads; the squads in rear of the attacking squad may be looked on as a reserve squad for the one in front. Thus, Casualty first squad. The thrower No. 3 is reinforced by the first thrower of the second squad, and so on.

Side Trenches. When a side trench is met with, the leading squad will go up and clear it. The second half will remain at the junction until first returns, then the second squad will continue advance in original direction of the attack.

Blocking and Barricades. For blocking captured trenches, etc., see Manual of Field Engineering, Wire Entanglements, Hurdles, etc.

The description of British and German grenades apply also to those grenades used by the French army. They are:

1. BALL GRENADE OR FORTRESS GRENADE

2. PEAR-SHAPED GRENADE—Percussion

Note. This grenade must be carefully handled; it is carried and packed “alive.”

3. BESOZZI GRENADE

Notes. 1. Fuse burns 5 seconds.
2. These grenades are always carried alive.
3. A special ring or striking box is provided to light the fuse.

Foreign Hair Brush Grenades. They are similar to the British No. 12 Hand Grenades .

The type B is more commonly met with than type A . Ignition is by time or percussion. The time of fuses about six seconds burning.

Precautions. When handling foreign grenades care should always be taken and the following rules should be enforced:

As the means of firing a grenade will be immediately apparent to the skilled grenadier on seeing the grenade, the following information only is of importance to the unskilled grenadier:

SPHERICAL GRENADE

Note. Use time of fuse burning, seven seconds, but another lighter which burns for five seconds—painted red—is also provided.

STICK CYLINDER GRENADE

SMALL STICK CYLINDER GRENADE

CYLINDRICAL GRENADE

Note. Time fuse burns is stamped on handle 5½ or seven seconds. Care must be taken when grenade is found without the pull loop, in case it has been fixed to light on unscrewing handle.

OYSTER SHELL OR DISC HAND GRENADE

Note. If safety pins and safety tubes are not in place, the above must be done without disturbing the grenade.

PARACHUTE GRENADE

RIFLE GRENADES

Note. Only a German rifle can be used, and more care in handling the grenade before firing must be taken than with the British grenades, they are liable to become “alive” if dropped on to the tail rods.

To the first group belong all propellant explosives, i.e., all powders, such as gunpowder and smokeless powders used in firearms.

The characteristic of H.E. is the extreme violence and suddenness of their detonation.

In order to make them instantly pass from a solid or liquid form to gas, they require a detonator or exploder, which applies a violent shock to them and breaks down the chemical structure of the explosive compound, and enables the flame to pass instantaneously throughout the mass of the compound. This explosive is known as detonation.

The composition of H.E. almost without exception is some organic substance, usually some form of carbon combined with nitrogen. Nitrogen, one of the most inert gases known, owes its explosive value to this very inertness; it combines so very reluctantly that on the least provocation—such as shock—the compound of which it forms a part instantly breaks up into gas, giving the enormous expansion needed for explosive effect. [Pg 52]

Ammonal. A gray powder. An Austrian explosive, picric acid plus T.N.T. plus aluminum powder plus nitrate of ammonia plus carbon.

A very safe explosive—will not detonate when struck by rifle bullet, but is very hygroscopic (collects moisture) and when in this condition is liable not to detonate.

Ballistite. Consists of guncotton plus camphor or vaseline. Invented by Nobel in 1888.

Cordite. Consists of nitro-glycerine 55 parts, plus guncotton 37 parts, plus vaseline 5 parts, plus acetone to harden, invented by Sir W. Abel.

Benzol. Or Benzine, used extensively as a motor fuel contains a fair percentage of toluene. (See T.N.T.)

Coal Tar. When subjected to fractional and low-temperature distillation produces many by-products valuable in the making of H.E. These distillations give off “light” and “heavy” oils of coal tar.

Guncotton , or nitro-cellulose consists of cotton waste, purified, dried, and heated with mixture of concentrated nitric and sulphuric acid. Washed and reduced to a pulp and moulded into 1 oz. primers and 15 oz. slabs for service use. Is considered inferior to lyddite.

Saltpeter 75 per cent, plus charcoal 15 per cent, plus sulphur 10 per cent. Rate of burning depends upon firmness of powder.

Lyddite , or picric acid. Consists of melted and solidified picric acid. Vaseline is used to melt it. (See Picric Acid.)

Mercury Fulminate. Is made by dissolving three parts mercury in 36 parts nitric acid, keeping mixture at low temperature, and when dissolved adding 17 parts of alcohol.

A small quantity of F. of M. placed on top of T.N.T. forms an excellent detonating mixture. A great many German detonators consist of this. Discovered by Howard in 1800.

Melinite. A French H.E., very similar to lyddite. Is picric acid mixed with collodion. Introduced by Eugene Turpin.

Nitro-glycerine. Is produced by the action of nitric acid and sulphuric acid on glycerine. Invented in 1847. When pure is a colorless liquid. Explodes when heated to about 360° F.

N.G. in liquid form too dangerous to be used in practice. Was absorbed in porous solid by Nobel in 1867 as dynamite. Porous solid used either kiesulguhr or fullers’ earth used in percussion caps.

Picric acid. A yellow crystalline prepared from coal tar. A by-product of gas manufacture. The “heavy oil” of coal tar is boiled [Pg 54] and chemically treated, resulting in phenol or carbolic acid, which separates from it. Carbolic acid is boiled sulphuric acid, and nitric acid is carefully added, resulting in picric acid.

It is a very safe explosive and very powerful. Its chief fault is that it forms “picrates” with metals or acid salts, some of which are more sensitive to disturbing influences than the acid itself. To overcome this the inside of all shells are varnished.

T.N.T. , or tri-nitro-toluene or Toluol, largely used in German army and navy. Is produced by heating toluene with mixture of nitric and sulphuric acid.

Less powerful than lyddite, but is more stable and does not form “picrates” and is not affected by water or air. Will not explode if hit by a bullet.

Toluene , or Toluol. Experiments made in 1899 at Karlsruhe produced about seven pints of toluene from one ton of coal. The modern process of low-temperature distillation of coal, however, greatly increases quantity that can be obtained from each ton.

Tetryl. A coal tar product containing more nitrogen than T.N.T. or lyddite. When mixed with a lead oxide it makes a less sensitive and safer preparation than fulminate of mercury for detonators.

SERVICE FUSE

Composition. Train of slow match inside a wrapping of hemp or flax, covered by layer of gutta-percha, surrounded by binding of black waterproof tape.

INSTANTANEOUS OR QUICK FUSE

Composition. Same as service fuse, except that it contains quick match in place of slow match.

Caution. Instantaneous fuse must never be stored alongside safety fuse. [Pg 56]

DETONATORS

Description. Copper tube open at one end painted red, marked on white label, No. 8. M.K. VII containing 32 grs. fulminate of mercury.

Description. Copper tube, open one end, containing 25 grs. fulminate of mercury. [Pg 57]

EXPLODERS

No. 2 Detonator for Hand Grenade. Consists of brass tube (detonator holder) with flat screw head. The other end is fitted with a cavity which carries N.G. percussion cap. A commercial detonator open end toward the screw head is placed inside, its open end closed with a wooden plug; the closed end is pierced with four flash holes to enable flash from percussion cap to communicate with F. of M. in detonator. A brass screw in head of detonator holder closes detonator tube.

No. 3 Detonator. See description of No. 2. This detonator is ¼ in. longer than No. 2, and has two screw threads.

PATENT LIGHTERS

Nobel Lighter. (See Plates 8 and 9.) The lighter is made up of two cardboard tubes, one fitting over the other; inside the end of the larger tube is a small brass cap containing friction composition. At the top of the smaller tube are two friction points. These points are held about ¼ in. from the cap containing friction composition, by a safety pin passing through both tubes. At the other end of the smaller tube is a small copper band into which the fuse can be crimped. A narrow band of waterproof tape with a loose end is glued around the joint of the two tubes to keep out moisture. [Pg 58]

To Assemble. Insert fuse into lighter, fasten by crimping, and insert other end of fuse into detonator. The joints at lighter and detonator should be waxed to make it damp-proof and flash-proof.

Brock Lighter. See Grenade Hand. Consists of a small cardboard cup filled with friction composition, covered with waterproof paper. The latter can be torn off by pulling a small tag which is left free.

Grenades with fuses are so arranged (with sufficient length of fuse) to explode from 3 to 5 seconds after being ignited and thrown, giving the thrower plenty of time (when throwing from a trench) to bend down safe. Grenades, without fuses (but with detonators only) will explode on impact; for instance, in Grenade No. 1, Mark I, it is obvious when instructions (see p. 2, Grenade 1) are carried out, and grenade is thrown, that the steel needle will be driven into the detonator and exploded.

In Grenade No. 3, Mark I, when safety pin is removed and releasing socket slipped back, the wind vane revolves backward (during the passage through the air) until far enough to allow the retaining bolt to fall out. This leaves nothing between the firing needle and detonator cap except a very thin spiral spring which is only strong enough to hold the weight of the needle pellet until the shock of impact when the grenade explodes.

In Grenade No. 5, Mark I. On this grenade being thrown the pressure of the fingers being released the striking lever flies outward by the pressure of the powerful spring, releasing the shoulder of the firing striker which is driven on to the fuse and explodes in 4½ seconds.

Hand grenades are held firmly in the hand behind the thrower, the arm is brought quickly upward with a sweeping movement (the arm straight all the time), the grenade will be let go when the hand is above the thrower’s head, and should describe a semicircle in its flight.

Hand grenades can be thrown from 30 to 50 yards, rifle grenades from 200 to 400 yards.

Attacks should be practiced with dummy and deteriorated grenades, i.e., grenades with only a detonator and no explosive, etc.

Confidence and knowledge of grenades should be gained by students handling, stripping and assembling all types and handling fuses and detonators, as often as possible.

The importance of grenade work cannot be over-estimated and one can imagine numberless cases when a grenade is more useful than any other weapon. For instance, in street fighting a number of the enemy are holding a house and firing from an upper window commanding the main approach. You cannot get at them with a rifle, but it might be comparatively easy for one or two men to get along to the house by back ways, using the other houses for shelter and throw a grenade through the window, killing everyone in the room.

*** END OF THE PROJECT GUTENBERG EBOOK HAND GRENADES: A HANDBOOK ON RIFLE AND HAND GRENADES ***

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PAGE
Introduction	1
Hand and Rifle Grenades	2
Grenade Establishment	26
Grenade Squad	28
Clearing a Trench from a Flank	29
Frontal Attack	32
Trench Storming Parties	36
Foreign Grenades. French	38
Foreign Grenades. German	42
Explosives used in Grenades	51
Fuses, Detonators, etc.	55
Throwing	59

Relative strength	150 equals maximum
Blasting glycerine	150
Gelatine dynamite	130
Gelignite	110
Dynamite	100
Carbonite	55

The Project Gutenberg eBook of Hand Grenades: A handbook on rifle and hand grenades

HAND GRENADES

HAND GRENADES

BRITISH GRENADES

GRENADE HAND NO. 1 or General Service

GRENADE HAND NO. 2

“GRENADE 303.” SHORT RIFLE NO. 3

GRENADE HAND NO. 5. MARK I.

GRENADES HAND NOS. 6 AND 7

GRENADE HAND NOS. 8 AND 9

GRENADE HAND NO. 12

BATTYE GRENADE

PITCHER HAND GRENADE

OVAL GRENADE

BALL GRENADE

NEWTON HAND GRENADE

NEWTON RIFLE GRENADE

HAND GRENADE NO. 19

RIFLE GRENADE NO. 20

DIVISIONAL GRENADE ESTABLISHMENT AND CHAINS OF AUTHORITY

COMPOSITION OF A GRENADE SQUAD

FRONTAL ATTACK

TRENCH STORMING PARTIES

FOREIGN GRENADES. FRENCH

1. BALL GRENADE OR FORTRESS GRENADE

2. PEAR-SHAPED GRENADE—Percussion

3. BESOZZI GRENADE

GERMAN GRENADES