Field artillery materiel

by Unknown

The Number 3.—He knows that turning the corrector worm knob clockwise decreases the setting; turning the range worm crank clockwise increases the range. In making these settings he keeps his eye squarely over the scales. He knows his scale settings at all times. He is taught to keep his fuze setter and its cover clean, and is shown how a small pile of dirt or wax behind the stop pin or in the rotating pin notch can throw out his settings and ruin the reputation of his section. Gum from the fuze often collects in these places. The surest way is to keep a match stick handy and clean out these places whenever there is a lull in the firing.

The Number 4.—If necessary to reset the fuze he must turn the projectile until it brings up against the stop pin, then cease all turning movement and draw the projectile straight out of the fuze setter. If he continues the turning motion unconsciously he can easily alter the setting by a fifth of a second. In loading he is careful not to strike the fuze against the breech and so alter the fuze setting.

The Number 5.—He knows where the rotating pin notch is in the fuze setter, and where the corresponding pin is on the fuze. He places the fuze so that the pin is seated in the notch with little or no turning movement and turns rapidly but with no more force than required. He is careful to set all fuzes with the same force, that is, not turn one with a violent twist and the next barely up to the stop.

APPENDIX “B”—Comparative table of guns used in World’s War.

	Austria, 1905	France, 1897	Germany, 1906	Gt. Britain, 1917	Italy, 1912	Russia, 1903	U. States, 1902	U. States, 1916
Caliber, inches	3.01	2.95	3.03	3.3	2.95	3.	3.	2.95
Weight of shrapnel, lbs.	14.72	16.00	15.00	18.00	14.3	14.41	15.00	16.00
Muzzle velocity, f. s.	1640	1750	1760	1680	1510	1930	1700	1600
Muzzle energy, ft. tons	275	335	242	340	224	273	300	311
Weight of gun	700	1000	766	880	690	785	710	765
Weight of gun and carriage	2000	2650	1860	2600	2260	2075	2230	3000
Weight of g., c. and limber	3750	4150	4200	4100	3350	3850	3730	4400
Maximum elevation	18	18	16	33	65	16$	16	53
Total traverse, degrees	8	6	8	8	52	5½	8	45
Length of recoil, inches	51.5	47	44	28-48	18-53	42.5	50	18-46
Height of wheels	4’3”	4’	4’5½”	4’3”	4’3½”	4’4”	4’8”	4’8”
Independent line of sight	No.	Yes.	No.	Yes.	Yes.	No.	No.	Yes.
Sights, goniometric, telescopic, panoramic, ordinary	P.	G.	T. G.	O. P.	T. P.	O. P.	O. P.	O. P.
Breech block, wedge swinging, eccentric screw.	W.	E. S.	W.	S.	W.	S. B.	S. B.	W.
Traverse, axle or pintle	P.	A.	P.	A.	P.	A.	A.	P.
Recuperation, spring or hydro-pneumatic	S.	H.	S.	H.	H.	S.	S.	S.
Length of gun, calibers	30	36	27.3	28.0	30	30	29.2	30.8
Width of track, inches	60	60	60	66	58	60	60	60
Range, maximum	6400	7550	7600	9000	8850	7800	6500	9650

APPENDIX “C”

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TABLE OF EQUIVALENTS.

1 mil.	3.37 minutes.
1 meter (m)	39.37 inches.
1 centimeter (cm)	.3937 inch.
1 millimeter (mm)	.03937 inch.
1 kilogram (kg)	2.2046 pounds.
1 dekagram (dkg)	.3527 ounce.
1 gram	15.432 grains.
1 liter	1.05671 quarts (U.S.).
1 inch	2.54 centimeters.
1 foot	.3048 meter.
1 yard	.9144 meter.
1 square inch	6.452 square centimeters.
1 cubic inch	16.39 cubic centimeters.
1 cubic foot	.02832 cubic meter.
1 cubic yard	.7645 cubic meter.
1 ounce	28.35 grams.
1 pound	.4536 kilogram.
1 quart (U. S.)	.9463 liter.
1 degree	17.777 mils.
1 kilogram (kg) per square centimeter	14.223 pounds per square inch.

INDEX