Report of the Chief of Ordnance to the Secretary of WarU.S. Government Printing Office, 1886 |
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Página 9
... means of enlisted men taken from the arsenals , who will require very consider- able instruction and practice to fit them ... mean pressure for one hundred observations has been 27,998 pounds per square inch of powder chamber , and the ...
... means of enlisted men taken from the arsenals , who will require very consider- able instruction and practice to fit them ... mean pressure for one hundred observations has been 27,998 pounds per square inch of powder chamber , and the ...
Página 14
... Mean horizontal deviation from center of impact Mean deviation from center of impact ..... Feet . 1.90 1.56 2.46 or the centers of all the shot - holes were contained within a circle of 64 feet diameter , which denotes a very high ...
... Mean horizontal deviation from center of impact Mean deviation from center of impact ..... Feet . 1.90 1.56 2.46 or the centers of all the shot - holes were contained within a circle of 64 feet diameter , which denotes a very high ...
Página 16
... means of test specimens taken from various parts along the inner face , while the other half was subjected first to ... Means Muzzle end : Outside Middle Inside . Pounds . Pounds . Per cent . 51,000 90 , 400 20.00 46,000 86 , 200 21.00 ...
... means of test specimens taken from various parts along the inner face , while the other half was subjected first to ... Means Muzzle end : Outside Middle Inside . Pounds . Pounds . Per cent . 51,000 90 , 400 20.00 46,000 86 , 200 21.00 ...
Página 88
... ( mean taken ) . For pressure : " Crusher gauge . ] Date . Initial velocity . No. of fire . Distance from muzzle ... Mean of 9 rounds . 1 , 499 7+ 32 , 388. 8 4.52 September 25 , 1885 .. 32 Do 34 108 ′ 2 ′′ 108 ′ 2 ′′ 1,493 29 , 300 4.50 ...
... ( mean taken ) . For pressure : " Crusher gauge . ] Date . Initial velocity . No. of fire . Distance from muzzle ... Mean of 9 rounds . 1 , 499 7+ 32 , 388. 8 4.52 September 25 , 1885 .. 32 Do 34 108 ′ 2 ′′ 108 ′ 2 ′′ 1,493 29 , 300 4.50 ...
Página 89
... Mean of 13 rounds 272 32,400 4.00 273 32 , 100 4. 00 E. V. K .; density , 1.750 ; granulation , 72 . Do. 31 , 557.7 4.28+ September 25 , 1885 . Do Mean of 2 rounds With 181 - pound Hotchkiss projectile . 33 36 28 , 500 4.50 30 , 800 ...
... Mean of 13 rounds 272 32,400 4.00 273 32 , 100 4. 00 E. V. K .; density , 1.750 ; granulation , 72 . Do. 31 , 557.7 4.28+ September 25 , 1885 . Do Mean of 2 rounds With 181 - pound Hotchkiss projectile . 33 36 28 , 500 4.50 30 , 800 ...
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Términos y frases comunes
35 Hotchkiss ammunition Appendix band blank cartridges bolts bore breech mechanism breech-loading rifle caliber 45 carriage cartridge cast Cast band cast-iron cent center of impact chamber Chief of Ordnance cincha clamps compression copper cylinder Density deviation from center DIAM'S Du Pont's Elastic limit Elongation after rupture eter Exterior diameter feet Fired into sand flight forgings front fuze gas check gas-check Gatling gun grooves H Ex1 pt2 hoop humid inch of original Inside iron jacket length loading metal Middle Midvale Steel Company miles an hour mortar MOUNTAIN GUN muzzle Number Ordnance Department P. M.-Barometer pack pins plate Pont's pounds per square powder pressure radius rear recoil ring sabot saddle sand butt Sandy Hook screws Sept shell shot shrinkage square inch straps surface target Tensile strength tension thermom thick tion trunnion-hoop trunnions tube Watertown Arsenal weight West Point Foundry wheels wire yards
Pasajes populares
Página 7 - All purchases and contracts for supplies or services, in any of the Departments of the Government, except for personal services, shall be made by advertising a sufficient time previously for proposals respecting the same, when the public exigencies do not require the immediate delivery of the articles, or performance of the service.
Página 383 - Nos. 1 and 5, 2 and 6, 3 and 7, and 4 and 8 were taken, two and two, from the ends of the hoop opposite each other.
Página 354 - A Treatise on the Application of Wire to the Construction of Ordnance." The deductions are, however, different from, and, it is hoped, clearer than those given in the above-mentioned work. The following are, as far as known to the writer, original with him : Formula for extension of wire wound with uniform tension.
Página 92 - States, shall be publicly subjected to the proper test, including such rapid firing as a like gun would be likely to be subjected to in actual battle, for the determination of the endurance of the same to the satisfaction of the President of the United States or such persons as he may select; and he is hereby authorized to select not to exceed five persons, who shall be skilled in...
Página 3 - I have the honor to submit the following report of the principal operations of the Ordnance Department during the fiscal year ended June 30, 1871, with such remarks and recommendations as the interests of that branch of the military service seem to require.
Página 227 - The Chief of Ordnance further stated in his report above quoted, page 10: The replies to this letter were, with one or two exceptions, adverse to undertaking such work, arising, I presume, from want of skill and knowledge in the treatment of steel for gun construction and from the want of the requisite plant to perfect the forgings. The conclusion reached was that the plant or the experience in this country cannot as yet produce the steel forgings, for tube and jacket, for so large a gnu as an 8-inch...
Página 395 - Reduction in diameter at point of rupture Reduction in area after rupture, per cent of original section Position of rupture Character of hroken surface Elongation of inch sections pounds..
Página 441 - ... this head and rests against the breech-block. The head is not in contact with the block but nearly so, and the distance can be increased or diminished by the nuts screwed on to the rear end of the spindle.
Página 3 - Jnne 30, 1866, ae proceeds of sales of Government property 43, 687 10 Amount transferred from ordnance appropriations in settlement of accounts during the fiscal year ended June 30...
Página 317 - Steel Company during the fiscal year ending June 30, 1886.* During the time specified the Midvale Steel Company continued work under the following contracts with the department, viz: (1) Forgings for fifty steel tubes, breech-cups, and muzzle-collars for 8-inch converted rides. (2) Forging...