These were Škoda guns with the 7 cm/45 SFK (Schnell-Feuer Kannone - Fast Firing Canon) introduced in 1900 as an anti-torpedo boat gun. The 7 cm/45 BAG (Ballon-Abwehr Geschütz - Anti-Airship Gun) was a similar design first introduced in 1909 as a sub-caliber gun for the Radetzky class and later modified into an AA gun. Besides shipboard use, two BAG guns were used in a coastal battery.
Actual bore diameter was 6.6 cm (2.6").
| Designation | 7 cm (2.75")/45 SFK
7 cm (2.75")/45 BAG |
|---|---|
| Ship Class Used On | SFK: Habsburg, Erzherzog Karl, Sankt Georg, Radetzky and Huszár classes
Sub-caliber: Radetzky BAG: Monarch, Erzhezog Karl class, Habsburg class, Tatra class, Triglav II class, Pandur and Usoke |
| Date Of Design | SFK: 1899
BAG: 1908 (sub-caliber) / 1915 (AA) |
| Date In Service | SFK: 1900
BAG: 1908 (sub-caliber) / 1915 (AA) |
| Gun Weight | SFK: 1,206 lbs. (547 kg) with breech |
| Gun Length oa | about 124 in (3.150 m) |
| Bore Length | N/A |
| Rifling Length | 89.8 in (2.280 m) |
| Grooves | (24) 0.030 in D x 0.236 W (0.75 mm D x 6.0 mm W) |
| Lands | 0.100 in (2.59 mm) |
| Twist | RH 1 in 25 |
| Chamber Volume | N/A |
| Rate Of Fire | 15 to 20 rounds per minute |
| Type | Fixed |
|---|---|
| Projectile Types and Weights | Shot: 11.0 lbs. (5 kg)
HE: 9.9 lbs. (4.5 kg) |
| Bursting Charge | Shot: 0.31 lbs. (0.14 kg)
HE: 3.5 lbs. (1.6 kg) |
| Projectile Length | Shot: 3.5 calibers
HE: 4 calibers |
| Propellant Charge | 3.5 lbs. (1.6 kg) |
| Muzzle Velocity | 2,380 fps (725 mps) |
| Working Pressure | N/A |
| Approximate Barrel Life | N/A |
| Ammunition stowage per gun | 400 rounds |
| Elevation | Distance |
|---|---|
| 45 degrees | 6,560 yards (6,000 m) [Range Table Maximum] |
| Designation | Single Mounts - ATB, Casemate, Sub-caliber and Anti-airship types 1 SFK: Habsburg (10), Erzherzog Karl (12), Sankt Georg (9) and Huszár (1) Sub-caliber: Radetzky (4) 2 BAG by Late War: Erzherzog Karl (2), Habsburg (2), Monarch (1), Triglav (2) Tatra (2), Uskoke (1), Pandur (1) and Stretter (1) |
|---|---|
| Weight | N/A |
| Elevation | Anti-torpedo boat: -10 / +20 degrees
Casemate: -6 / +15 degrees Sub-caliber: (-6? / +20 degrees) Anti-airship: -5 / +90 degrees |
| Elevation Rate | N/A |
| Train | 360 |
| Train Rate | N/A |
| Gun recoil | N/A |
| Loading Angle | Any |
- ^The quantities in this section are primarily based upon the findings of Mihály Krámli and may disagree with the quantities found in other sources. The number of available weapons and the quantities used on each ship fluctuated during the war as guns became available either by new production or by reusing guns from older ships being decommissioned.
- ^The sub-caliber guns on the Radetzky class were replaced by 7 cm/50 K16 AA guns during the war.
"Naval Weapons of World War One" by Norman Friedman
"Austro-Hungarian Battleships 1914-18" by Ryan Noppen
"A Fleet in Being: Austro-Hungarian Warships of WWI" by Russell Phillips
"The Viribus Unitis Class" article in "Warship Volume II" by Friedrich Prasky
"Le Navi Da Battaglia Austro-Ungariche nella Prima Guerra Mondiale 1914-1918" [Austro-Hungarian Battleships in World War I 1914-1918] by Marco Zelaschi
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Original research by Mihály Krámli, author of "A Használhatatlan Lövegtornony Mítosza: Legenda Vagy Valóság?" [The Myth of the Useless Turret: Legend or Reality?] and
"Az Osztrák-Magyar Monarchia Csatahajói: 1904-1914" [Austro-Hungarian Battleships and Battleship Designs: 1904-1914]
{Link - Hungarian to complete book in pdf form and Link - English}.
Paperback copies printed on A4 paper and shipped from Hungary are available. Contact NavWeaps by clicking on the Contact link above or below.
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Tony DiGiulian's personal data files
01 July 2024 - New Datapage