Krupp’s Cast-Steel Coast and Naval Guns
of 30 and 35 Calibres Length.
—(Continued.)

26 cm.28 cm.30½ cm.
Of 30
calib.
length.
Of 35
calib.
length.
Of 30
calib.
length.
Of 35
calib.
length.
Of 30
calib.
length.
Of 35
calib.
length.
Calibremm 260 260 280 280305305
Total length7800910084009800915010700
Length of bore702083207560896082209770
Weight of gunkg250002810033200373004290048400
Weight of steel shell205205255255329329
Battering charge8383103103132132
Muzzle-velocitym575605575605575605
Energy totalmt3454.53824.442974757.35544.26137.9
per cm. of circumference42.2946.8248.8554.0857.8664.05
per cm². of cross section6.517.206.987.737.598.40
per 1000 kg of weight of gun138136129.5127.5129127
Remaining
velocity
of steel shell
of 500 mm546.8575.3548.6577.3550.7579.4
” 1000 ”519.9547 523.5550.8527.4554.9
” 1500 ”494.4520.1499.4525.5505.1531.5
” 2000 ”470.1494.6476.5501.4483.8509
” 2500 ”447 470.3454.7478.4463.3487.5
Energytotal” 500 ”mt3123.53458 3912 4330.85085.35629.9
” 1000 ”2824.13126.53561.23942.54664.55164
” 1500 ”2553.52826.83242 3589.14278.54736.7
” 2000 ”2308.72556 2951.33267.33924.44334.7
” 2500 ”2087.52311.32686.72974.43599.63083
per cm. of
circumference
” 500 ”38.2442.3344.4749.2349.2358.75
” 1000 ”34.5738.2840.4844.8248.6853.89
” 1500 ”31.2634.6136.8540.8044.6549.43
” 2000 ”28.2631.2933.5537.1440.9645.34
” 2500 ”25.5628.2930.6233.8137.5741.59
per cm² of
cross section
” 500 ”5.886.516.357.036.967.71
” 1000 ”5.325.895.786.406.387.07
” 1500 ”4.815.325.275.835.866.48
” 2000 ”4.354.814.795.315.375.95
” 2500 ”3.934.354.374.834.825.45
When strikingat the muzzle at a
at right anglesdistancecm51.556  55.560  60.565  
the steel shellof 500 m ”48  51.551.556  56.561  
penetrates a ” 1000 ”  ”44.548  48  52  53  56.5
wrought Iron-Plate ” 1500 ”  ”41.544.544.548.549.553.5
of the following ” 2000 ”  ”38  41.541.545  46.550  
thickness ” 2500 ”  ”35.538  38.542  43  47  
at the muzzle at a
distancecm35 + 26.535 +31.538 +26.538 +32.540 + 34  40 + 37  
Or two plates ofof 500 m ”35 + 21.535 +26.538 + 23  38 + 27  40 +26.540 + 32.5
the following ” 1000 ”  ”35 + 17  35 +21.538 + 18  38 +23.540 +21.540 + 27.5
thickness ” 1500 ”  ”35 + 12.535 +17  38 + 13  38 +18.540 + 17  40 + 23  
” 2000 ”  ”35 +  7.535 +12.538 + 8  38 +13.540 + 13  40 + 18  
” 2500 ”  ”35 +  2  35 +  7.538 +  2.538 +  8.540 +  7  40 + 13.5

Krupp’s Cast-Steel Coast and Naval Guns
of 30 and 35 Calibres Length.
—(Continued.)

35½ cm.40 cm.
Of 30
calib.
length.
Of 35
calib.
length.
Of 30
calib.
length.
Of 35
calib.
length.
Calibremm 355 355 400 400
Total length10650124001200014000
Length of bore9510112601070012700
Weight of gunkg680007650097200109500
Weight of steel shell525525740740
Battering charge210210295295
Muzzle-velocitym575605575605
Energy totalmt88479794.5 1247013805
per cm. of circumference79.3387.8299.23109.86
per cm². of cross section8.949.909.9210.99
per 1000 kg of weight of gun129127128.5126.5
Remaining
velocity
of steel shell
of 500 mm554.3583.2556.3585.4
” 1000 ”534.3562.2538.2566.3
” 1500 ”515.1542  520.8547.9
” 2000 ”496.6522.5503.8530.1
” 2500 ”478.7503.6487.5512.9
Energytotal” 500 ”mt8221.59101.81167312923
” 1000 ”7640.28458.21092712097
” 1500 ”7099.87860.21022811323
” 2000 ”6598  7304.39574.6 10599
” 2500 ”6131.36787.88962.6 9922.3
per cm. of
circumference
” 500 ”73.7281.6192.89102.84 
” 1000 ”68.5075.8486.9596.26
” 1500 ”63.6670.4881.4090.11
” 2000 ”59.1665.4976.1984.35
” 2500 ”54.9760.8671.3278.96
per cm² of
cross section
” 500 ”8.319.209.2910.28 
” 1000 ”7.728.558.709.63
” 1500 ”7.177.948.149.01
” 2000 ”6.677.387.628.44
” 2500 ”6.196.867.137.90
When strikingat the muzzle at a
at right anglesdistancecm70.576.579  85.5
the steel shellof 500 m ”67  72.575  81  
penetrates a ” 1000 ”  ”63.568.571.577  
wrought Iron-Plate ” 1500 ”  ”60  64.568  73  
of the following ” 2000 ”  ”57  61  65  70  
thickness ” 2500 ”  ”54  58  62  66.5
at the muzzle at a
distancecm50 + 34  50 +40.560 +32.560 + 41  
Or two plates ofof 500 m ”50 + 29  50 +35.560 +27.560 + 35.5
the following ” 1000 ”  ”50 + 24  50 +30.560 +22.560 + 30.5
thickness ” 1500 ”  ”50 + 19  50 + 26  60 +17.560 + 25.5
” 2000 ”  ”50 + 14.550 + 21  60 + 12  60 + 20  
” 2500 ”  ”50 +  9  50 + 16  60 +  5.560 + 15  

INDEX.

Footnotes: