4.7 in QF Gun B
Mk I
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British designation : |
Ordnance QF
4.7in Gun B Mk. I-IV on carriage, travelling, QF 4.7in Mk. I |
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Calibre : |
119mm L/41 |
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Weight of the barrel : |
2083 kg |
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Weight in action : |
3819 kg |
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Barrel length : |
4.930 m |
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Length of the bore : |
4.801 m |
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Barrel grooves : |
22 |
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Battering
charge : |
5.4 of SP
(Small Pebble) black powder |
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2.5 kg of
Cordite 20 |
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2.9 kg of MD
16 (Modified Cordite) |
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H.E. Shell |
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Mk. I - II |
weight : |
21.1 kg – charge
: 3.3 kg Lyddite |
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length : |
433.3 mm |
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fuze : |
Percussion
Fuze Direct Action with Cap N° 1 Mk. II Percussion
Fuze Direct Action with Cap N° 17 Mk. III |
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Mk. III - IV |
weight : |
21.1 kg –
charge : 3 kg Amatol |
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length : |
415.5 mm |
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fuze : |
Percussion Fuze
Direct Action with Cap N° 17 Mk. III |
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Mk. III - IV |
weight : |
21.1 kg –
charge : 3 kg Lyddite |
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length : |
416 mm |
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fuze : |
Percussion
Fuze Direct Action with Cap N° 17 Mk. III |
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Mk. V and VII |
weight : |
20.41 kg –
charge : 3 kg Amatol |
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length : |
415.5 mm |
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fuze : |
Percussion
Fuze Direct Action N° 18 Mk. I and Mk. II |
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Mk. VI |
weight : |
20.41 kg –
charge : 2.9 kg Amatol |
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length : |
401.5 mm |
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fuze : |
Percussion
Fuze Direct Action N° 18 Mk. I and Mk. II |
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Shrapnel |
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Mk. IV |
weight : |
20.41 kg – 580
mixed bullets x 13 g x 13.75mm |
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length : |
329.1 mm |
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fuze : |
Time and
Percussion Middle Fuze No. 54 Time and
Percussion Fuze No. 62 Time and
Percussion No. 64 |
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Mk. V |
weight : |
20.41 kg –
712 mixed bullets x 13 g x 13.75mm |
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length : |
322.6 mm |
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fuze : |
Time and
Percussion Middle Fuze No. 54 Time and
Percussion Fuze No. 62 Time and
Percussion No. 64 |
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Muzzle velocity : |
544 m/s
(with SP and shells weighting 20.41 kg) |
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648 m/s (with Cordite and shells weighting 20.41 kg) |
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675 m/s (with MD and shells weighting 20.41 kg) |
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Max. range : |
9140 m |
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Elevation : |
+ 20° / - 6° |
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Traversing angle : |
– |
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Recoil : |
305 mm |
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Remarks : Quick firing
naval gun, hydro-spring recoil mechanism with spade. It was
adopted by the Royal Navy in 1887 and employed on the pre-Dreadnought
battleships and cruisers of the late 1800s. During the Boer War it was put on a field carriage built largely of wood
designed by the Royal Navy captain Percy Scott. Later the Royal Carriage
Department designed a less cumbersome carriage (Mk I Woolwich carriage), and
a little number of these guns were mounted on the old 40-pdr BL gun heavier
carriage with spring spade. Overall 776 of these guns were
built specifically for the Navy and an additional 110 were transferred
to the Navy from the Army. During the World War this
gun fired only shells weighting 20.41 kg. To defend
Belgrade in February 1915 a British Naval Mission headed by Rear-Admiral Sir
Ernest Troubridge was sent
to Serbia. It comprised a naval gun detachment composed by 4 two guns
batteries with 4.7-inch guns with 25 men and 2 officers under the command of
Lieutenant-Commander Charles Kerr. These batteries, manned chiefly by Serbs
with British personnel to lay the guns, saw only occasional action in
exchanges of fire with guns on the opposite bank. After the fall of Belgrade
the Bulgarian Army captured 6 of these guns, and in July 1916 the Inspection
of the Artillery ordered to repair them and commissioned shells for them in
Germany. However, there is no evidence of their use in combat. Some
4.7-inch guns mounted on “Percy Scott” carriages served with the British
Salonika Force in Macedonia. |
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Percy Scott carriage |
Woolwich carriage |
