Hotchkiss Revolving Cannon [Ord. Memo No. 27] - Lieut. H. D. Borup (US GPO, 1886) WW.pdf

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OUDNANCE MEMORANDA N O. 27.
HOTCHKISS REVOLVING CANNON,
PHEPARRD L'NDl~R Till~ X>IRRCTION OF
B R I G. G E N . S rr E P H E N V. B E N l~ '1',
Cfi"illfo' OF ORDNANCE, U. S. ARMY,
llY
LIEUT. H. D. BORUP.
PUB L I C AT I 0 N AUT H 0 R I Z ED BY T H E S E C R B TAR Y 0 ~' W A I{ .
W .A.SHINGTON:
GOVERNMENT PRINTING OFFICE.
188().
MEM 27
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TABLE OF
OONr.1_1ENTS .
TilE REVOLV ING CANNON.
Pnge.
Nomenclature and description . . . . . . .. .. .. .. .. .. ... ... . .. . .. .. .. .. . ... .. .. .. .. .... .. .. .. . .. . ..
!)
The group of barrels .. . .. . .. . . . . .. . . .. .. .. . . .. . . .. . . . .. . . . .. .. . . .. .. . . .. . . .. .. . . .. .. .. .. .. . . .
9
The breech and its mechanism . .. . .. . .. . .. . . .. .. .. .. .. . . .. .... .. .. .. .. .. .. .. .. .. .. .. .. . . .. . .. .
10
The frame... . .. .. .. .. . . .. . .. . .. .. . . .. .. . . .. . . .. .. .... .. .. .. .. . . .. . . . .. . .. . . .. . .. . .. .. .. . .. .. ..
15
The sights .... ...... ....'........ .. . ... ... ...... ................................. .. :.... . .. .. .
16
Tbe carriage ................................................... ... ............
..... : ... .... .
16
The limber... ......... ...... .. .. ...... ................................... . .. .......... .. .....
lt:i
The caisson ............ .... ...... ............ . .................... .. . . ........... ... . . .......
19
The eqnipments ...... ...... ...... .... ...... .... ...... ...... ...... ...... .... ...... . .. .. . ......
10
TFffi FLANK DEF'ENSl~ GUN.
The sights.... ............ .............. .............. ..... ......... ........... . ... ..........
2:3
The carriage .................... .. .. ........ .. ...... ..................... ... .................
2~
The equipments .... .... ...... .... ... ...... ...... ...... .... ... . ...... .... .... .... ...... ......
23
'l'he ammunition....................................... . ............. ........................
25
To dismount the piece...... .... ................ .......... ....................................
2
To assemble the piece .... ...... ...... ...... ...... .... .... .... .... ...... .... ...... .... .... ....
2\l
:n
Action of the mechanism.. ............... ............................. ............... ........
D1RltCTIONS CONCIWNLNG llfANAGEMEJS'f 01' TilE ImVOLVlNG CANNON.
:n
:34
:I
:3R
41
41
41
Management of J1iece hefore firing ................................... . .... .... ....... . .. . . ....
Management during firing ........ ... ... .......... .... .... ...................... .... ...... .. ..
Unloading .................. ........................................................ .... .. .
Management after firing ............ .... .. .... ................................................
Ammunition ................................................................................ .
General rules .............................. ............... .............. . .................... .
Tactics .............. ............ .. .. ..
APPENDIX.
Tbeuavalguns .... ...................... ....... . ................ ...... ......................
48
The sights. ............. ............ ...... ........................................ .......... .
44
Tlte carriages .......... .................. ...... ...... ... ................. .... . : .... .... .... ..
4(;
TABLE.., .
Army material: guns........ .. .... . ... .. ... ... ... . ... . .. ... .. ... ... ... .... .... . ... ...... ....
47
Army material: arumnuitiou. .... .... ...... ...... ...... .... . ... ...... ...... .... .... .. .. . ... ...
4
Army material: mounts, carriage, and equipments...... .... .... .... .... .... .... .... .. .. ... .. . .
4D
r,o
Naval material: gnu.. .. ......... . .... ........... ........ ... . ...................... .... . .. ...
NavalJuaterial: ammunition ..... ...... ...... ...... . ..... ...... .... ...... .... .. .... .... ......
51
NaYal mate rial: mounts, carriage, and equ ipments ....... .... ...... ...... ...... ...... .... .....
52
Ballistic data: firing table of the 1.45-inch gun.. .............. .. ...... .. .. .......... .. ...... ..
53
3
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LIST OF PLA1 1 ES.
I. Plan of fi elll gun and details of breech mecl.muism.
II. The fi eld gun-sectional vi ews.
III. 1.85-inch naval gun-breech mechanism.
IV. 1. 85 -inch naval gun-breech m ec hanism.
V. The sigiJts.
VI. Carriage for the light field gun.
VII. Shield for the ligbt fi eld gnu.
VIII. Tool box for tbe light field gun.
IX. Limber for light field gun.
X. Ammunition chest on the light fi ehl gun limber.
XI. Caisson body.
XII. Equipments for light field gun.
XIII. Equipments for li~bt Jleld gun.
XIV. Charger.
XV. F eed trough.
XVI. Pouch.
XVII. U. S. carriage for flank defense gun.
XVIII. German mount for tlattk defense gnn.
XIX. French caponicre carriage for :flank defonse gun.
XX. .Ammnnition.
XXI. Fuses.
XXII. D eck canin.ge for 2.1-incb naval g nu.
,,
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NOTE.
This description of the Hotchkiss revolving cannon pertains to the
Army types, but a brief notice of the naval guns appears in tlte Appendix.
1. 1 he breech mechanism of the 1.85-in<·h naval gnn is illustrated, p<trtly
because it is shown on a larger scale than that for the Army piece, and
partly because it is a later type, anu hns some modifications introduced.
A plate showing the deck earriage of tlte hu·ge st naval piece-the 2.1 inch-
is also included, as it is possible that it may form part of the armament of
our permanent fortifications.
In rompiling· this report on the Hotchkiss revolving cannon, the fol-
lowing authorities h::we been made nse of:
The Hotchkiss revolving cannon, lly Lieut. E, W. Very, U.S. A.
Heglemeut am· le service dn canon.revolver, approuve par Ie Ministre de la guerre Ie 9 sep-
tembre 1883.
Exercise du canon-revolver, systeme Hotchkiss, 2'' tir·age.
Die3.7cm Hevolver-Kanone, Nomenclatur unci Beschreibuug derselben, sowie der Munition.
Heports of the Cb ief of Orduauce, U.S. A.
Letter from the Hotchkiss Company.
Letter from Lieut. E. W. Very, U. S. A.
"Engineering," London. •
7
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THE IIOTCIIKISS REVOLVING CANNON.
The Hotchkiss revolving cannon as maclA for field service is designed
to reinforee anu complete the effective ZlOlle of action of light artillery.
rrhere are two sizes; the caliber (1.4!) inclt) and details of rifling being the
s11me in both, the difference consisting principally in the weight and length,
and also in the size of cartridge.
The table on page-±7 shows more exactly
what these differences are.
"OMBNOLATU:RE AND DESCRIPTION OF TilE RE\OLYING CANNON.
The revoh·ing cannon consists of: (1) rrhe group of banels; (~) the
IJreech and its mechn,nisrn;
(3) the frame; ( 4) the sights; (5) the car-
riages; (G) the equipments.
TJTE
GlWUP OF H.ARRELS.
The group of ba,rrels, Plates I-IV, is composed of 5 steel barrels, 2
bronze di~k~, 1 steel lmrrel shaft, and 1 pin-wheel.
The barrels AA are made of \Vbitworth compressed steel. On the
interior the bore is divided into the smooth a11cl the rifled pnrt, the former
being composed of the conieal cartridge-cllsc cltamber, the projectile cham-
ber, ;mel the coni('al frnstum joining them. The rifling lands are narrow,
the twist i.Jeing left-handed. On the exterior eac·h barrel is divitlecl into
the chase and breech, the former being conical und the latter cylindrical,
with a thread on its rear end.
The five barrels are grouped around the uar1'el-sha{t, B, their axes being
parallel to it and to ~ach other. They are maintained in position by two
brow:e disks, C 0', en~.:h of which is pierced with six l10l es, the central one
MEM27--2
9
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