unit
of measure
conversions
equivalences
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italiano
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english
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bore
of the arms
The
bore is represented from the diameter of the spirit of one
gun tube or of an arm to striped gun-barrel whichever, of
rule is expressed in millimeter, and is measured between the
full loads of the threading. The minimal bore in artillery
is equal to 20 millimeter. Under such measure the weapon is
considered portable. The maximum bore caught up in artillery
has been of 600 milimeter, belonged to a used German self-moving
mortar in war 1939-45.
In the rifled gun barrel small-caliber, the
bore is represented with conventional numbers that they report
to the measure in cent or thousandth of inch.
In the smooth-bore gun barrel the bore is
indicated with a number correspondent to the number of spherical
balls of lead having equal diameter to that one of the cane
which they can be obtained from one pound of lead. |
bores
rifle
gun barrel
| calibre |
inch |
mm |
| 22 |
0.2204 |
5.6 |
| 25 |
0.2500 |
6.35 |
| 32 |
0.3008 |
7.63 |
| 320 |
0.3200 |
8.13 |
| 38 |
0.3580 |
9.00 |
| 380 |
0.3800 |
9.65 |
|
smooth
bore gun barrel
| calibre (*) |
mm (a) |
mm (b) |
calibre |
mm (a) |
mm (b) |
| 36 |
10.40 |
10.60 |
14 |
17.60 |
17.40 |
| 32 |
12.75 |
12.95 |
12 |
18.50 |
18.30 |
| 28 |
14.00 |
14.20 |
10 |
19.70 |
19.50 |
| 24 |
14.70 |
14.90 |
8 |
21.20 |
21.00 |
| 20 |
15.60 |
15.80 |
4 |
23.75 |
23.55 |
| 16 |
16.80 |
17.00 |
- |
- |
- |
|
(*)
MEASURED AT 230 mm FROM BREECH
- (a)
Convention of Liegi ± 0.2 mm
- (b)
Italiy and France
Italian
official numeration of the shot
| number |
14 |
13 |
12 |
11 |
10 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
2/0 |
3/0 |
4/0 |
| diameter
mm |
1.1 |
1.3 |
1.5 |
1.7 |
1.9 |
2.1 |
2.3 |
2.5 |
2.7 |
2.9 |
3.1 |
3.3 |
3.5 |
3.7 |
3.9 |
4.1 |
4.3 |
4.5 |
Italian
official numeration of the buckshot
| number |
5/0 |
6/0 |
7/0 |
8/0 |
9/0 |
10/0 |
11/0 |
| diameter
mm |
5.0 |
5.6 |
6.2 |
6.8 |
7.4 |
8.0 |
8.6 |
the
large Berta
| Between
the superguns realized towards the end of the 1°large world
war it detaches the " Berthe ",
name with which the French they called the gun produced from
the steel mills Krupp in order to bomb Paris, in fact the
landlady of the factory called Berthe von Krupp. Intubate
until 210 millimeter of bore one gun tube of 381 millimeter,
ne turned out one gun from 210/150, along 31,5 m (150 bores),
that it employed a remarkable charge of launch in order to
shoot to bullets with 150 m/s of initial speed, and one 120
Km of the maximum throw.
|
| The
unit of measure of the explosive power of the atomic weapon
is the kiloton, equivalent to the energy
developed from the explosion of 1 000 t of tritolo (trinitrotoluene
or TNT). The two bombs 'A' launch from the USA against Japan
and eplose on Hiroshima and Nakasaki the 9 and the 6 August
1945, had the 20 power of kiloton each. For the bombs 'B'
the multiple megaton is used alone, correspondent
to 1 000 000 of t of tritolo. |
  
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