Obice 305/17 modello 16 su affusto De Stefano This was originally an Italian coastal defence howitzer developed for Garrone type howitzers. However, during the PSV it was also used with the De Stefano-type lafetta. Some Italian materials refer to this weapon as a mortar, so one may come across these two designations: the Obice da 305/17 D. S., or: the Mortaio da 305/17 D. S.
The letters "DS" are an abbreviation for the De Stefano-type lafette. It was a multi-purpose laffette suitable for transporting large ship and field guns in PSV conditions. It has been claimed that the De Stefano was also divided into three parts when transporting the gun over longer distances, but my knowledge rather suggests the use of a two-piece set. During the war both types of Garrone and De Stefano were used side by side. It is not possible to determine from available sources exactly how many of which there were.
About 23 guns survived the war, and I assume that there was then a single gun lafette with a three-carriage assembly.
The following guns are currently known to have a De Stefano-type lafetta: - 8-inch ship's gun: Cannone da 203/45 D. S. - 10 inch ship's gun: Cannone da 254/40 D. S. - 12-inch ship's gun: Cannone da 305/40 D.S. - 12-inch ship's gun: Cannone da 305/46 D. S. - 210 mm mortar d/8: Mortaio da 210/8 D.S. - 305 mm mortar d/8: Mortaio da 305/17 D.S. - 305 mm howitzer d/17: Obice da 305/17 D.S.
Basic data - manufacturer: L′Armstrong di Pozzuoli l′arsenale di Napoli, Italia - Start of development: 1912 - production years: 1914-1917 - about 30 pieces made with Garrone and De Stefano dies, some materials speak of 44 pieces - factory marking: undetected - Italian military designation: Obice da 305/17 modello 16 su affusto De Stefano - Italian military abbreviation: Obice da 305/17 mod. 16 D.S., or: mod. 916 D.S.
- Nominal calibre: 305 mm - barrel length: 5185 mm (d/17), some sources say ~5640 mm (d/18.5) - bore length: 4330 mm (d/14.2) - barrel weight including breech: 12790 kg - weight of barrel carriage: 11832 kg - weight of the barrel carriage: 11950 kg - weight of bearing carriage: 12080 kg - weight in firing position: ~22800 kg - Bearing: +0° to +65° - Bearing: 360° - Stroke speed: 412 to 502 m/s - Normal rate of fire: 1 round per 12 minutes - Rapid fire: 1 shot in 5 minutes
Towing vehicle - Wheeled tractor: Pavesi-Tolotti tipo B - transport speed: 6 to 8 km/h
Types of missiles used
Heavy shrapnel-tear projectile - Weight: 442 kg - range: 12700 m
Long fragmentation missile - weight: 348 kg - range: 14600 m
Lightweight fragmentation missile - weight: 292.2 kg - range: 17600 m
Breakthrough missile - weight: 328.6 kg
Source David Nicole: The Italian Army of World War I, publ. Osprey, Man-at-Arms edition, 2003, ISBN 978-1841763989 V. Shunkov: Encilopjedija artilljerii osoboj mashchnosti, publ. Charvjest, Moscow, 2004, ISBN 985-13-1462-5
K přepravě na malé vzdálenosti se používal naviják tahače a kladkostroje.
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Druhá možnost přepravy do palebného postavení byla pomocí polní dráhy.
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Houfnice 305/17 D. S. v palebném postavení.
URL : https://www.valka.cz/Obice-305-17-modello-16-su-affusto-De-Stefano-t88333#327742
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