the field artillery journal - Fort Sill - U.S. Army

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FIG. 9.—TWO-TON FOUR-WHEEL DRIVE TRUCK TOWING LIMBER AND CAISSON OVER CORN FIELD WITH DEEP FURROWS. FIG. 10.—ABOUT THE LIMIT OF TOWING CAPACITY OF A TWO-TON FOUR-WHEEL DRIVE TYPE TRUCK. EIGHT PER CENT, GRADE. WET, SLIGHTLY FROZEN SOD. SIX-INCH HOWITZER WHEELS SUNK FIVE TO NINE INCHES. TRUCK WHEELS EQUIPPED WITH CHAINS AND AMPLE POWER DELIVERED TO WHEELS TO KEEP THEM TURNING. FAILED ACCOUNT WHEELS DIGGING IN GROUND. SUCCEEDED WITH EIGHT MEN PUSHING. TOTAL WEIGHT OF TRUCK AND LOAD 7500 POUNDS.
MOTOR TRANSPORT FOR FIELD ARTILLERY is damaging to vehicles of rigid construction. Fig. 11 shows a horse-drawn caisson striking a crossing projecting about two inches from a smooth road. At fifteen or twenty miles per hour the jolt would have been worse. This is not a plea for nursing matériel but the fact that our vehicles are rigid must be considered and tractor companies whose product is not so rigid, will not guarantee over six miles per hour and normally provide a maximum speed of about 4 miles. For rapid movements over good roads of guns assigned to anti-aircraft service, to resist landing parties or to other special rôles of minor tactics, would it not be better to place the gun on the truck and run it off at the destination? Fig. 12 shows a German gun so carried and it is understood that the French have done the same thing quite extensively. Figs. 13 and 14 show an excellent type of 50-horse power wheeled farm tractor tested. This machine weighed 8500 pounds and at first appeared very attractive for heavy towing, but the drawbar pull in bad mud before the wheels began to spin was only 1500 pounds and it takes 2000 to move a 4.7inch gun in bad mud. When good footing could be secured the pull was 4000 pounds without effort and 5000 in low gear. The following table gives an idea of the capabilities of such a machine on fair roads. Grade per cent. Pounds pull per ton Effective drawbar pull (4000 lbs. less component of weight acting paralled to road) Tons which can be hauled Tons which can be hauled assuming matimum pull of 5000 lbs. less component of weight parallel to road 0 175 4000 23 27 5 225 3600 17 21 10 300 3200 11 14 15 410 2700 6 8. 5 20 575 2300 4 6 25 800 1800 2 3. 5 It will be seen that the power is ample for handling a section of heavy artillery under normal conditions and a gun or ammunition limber and caisson on grades running up to 25 per cent., always assuming that the hold on the ground is sufficient 31
Page 1 and 2: THE FIELD ARTILLERY JOURNAL Volume
Page 3 and 4: OLD FORT SILL FROM NEW ANGLE THIS P
Page 5 and 6: THE FIELD ARTILLERY JOURNAL unstint
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Page 17 and 18: NOTE TO FIG. 3.—The black line le
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Page 27 and 28: Motor Transport for Field Artillery
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Page 31 and 32: MOTOR TRANSPORT FOR FIELD ARTILLERY
Page 33 and 34: FIG. 3.—POWER-OPERATED WINCH WITH
Page 37: FIG. 7.—ABOUT THE ONLY KIND OF GR
Page 41 and 42: FIG. 11.—RAPID TOWING WITH AN AUT
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Page 55 and 56: Concealment and Protection of Artil
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Page 63 and 64: Notes on the Recent Tractor Test at
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Page 71 and 72: In the Field BY GERALD E. GRIFFIN,
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BELGIAN FIELD ARTILLERY ON THE YSER
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BELGIAN FIELD ARTILLERY ON THE YSER
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SUPPLEMENTAL NOTES ON LOST MOTION p
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SUPPLEMENTAL NOTES ON LOST MOTION 1
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TRANSPORTATION BY MOTOR TRUCK It is
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TRANSPORTATION BY MOTOR TRUCK them
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TRANSPORTATION BY MOTOR TRUCK all o
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RECONNAISSANCE OF BATTALION POSITIO
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FIG. 1.—NEAR WHEEL HORSE FIG. 2.
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THE FIELD ARTILLERY JOURNAL box (Fi
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THE FIELD ARTILLERY JOURNAL of fund
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THE FIELD ARTILLERY JOURNAL 126
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THE FIELD ARTILLERY JOURNAL In usin
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THE FIELD ARTILLERY JOURNAL been fo
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THE FIELD ARTILLERY JOURNAL Strive
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THE FIELD ARTILLERY JOURNAL therefo
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EDITORIAL DEPARTMENT Appreciation T
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THE FIELD ARTILLERY JOURNAL retains
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THE FIELD ARTILLERY JOURNAL Certain
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THE FIELD ARTILLERY JOURNAL control
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BOOK REVIEWS EMPIRE AND ARMAMENT. T
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THE FIELD ARTILLERY JOURNAL etc. Th
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THE FIELD ARTILLERY JOURNAL WEST PO
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Index to Current Field Artillery Li
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THE FIELD ARTILLERY JOURNAL Guns—
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Exchanges LOANED TO MEMBERS ON REQU
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THE FIELD ARTILLERY JOURNAL FIELD A
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BATTERY E, NEW YORK CITY Capt. John
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BATTERY A, INDIANAPOLIS Capt. Gavin
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NINTH INSPECTION DISTRICT Lieut. Em
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