NAVYPEDIA

Photo

U1 1917

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
U1			Marinearsenal Pola	7/1907	10.2.1909	11/1909	BU 1920
U2			Marinearsenal Pola	7/1907	3.4.1909	12/1909	BU 1920

Technical data

Displacement normal, t	230 / 270
Displacement full, t
Length, m	30.5
Breadth, m	3.35
Draught, m	3.20
No of shafts	2
Machinery	2 petrol engines / 2 electric motors
Power, h. p.	640 / 200
Max speed, kts	10.3 / 5
Fuel, t	petrol
Endurance, nm(kts)	950(6) / 40(3)
Armament	3 - 450 TT (2 bow, 1 stern, 5)
Complement	17
Diving depth operational, m	30 max

Standard scale images

Graphics

Project history Built to the design of the American Simon Lake at the Pola N Yd and had the features typical of this submarine designer two retractable wheels for movement over the seabed, a

Built to the design of the American Simon Lake at the Pola N Yd and had the features typical of this submarine designer: two retractable wheels for movement over the seabed, a diving chamber under the bow and variable pitch propellers. The diving tanks were situated on top of the cylindrical single hull, above the waterline, which meant that a heavy ballast keel was necessary to provide vertical stability, and had to be flooded by pumps, the whole operation totalling 8 minutes. Furthermore the gasoline engines could not be considered effective under war conditions and did not reach the contract power, so the Austro-Hungarian Navy only paid for the hulls and armament. Thereafter new diesels were ordered in Austria and until their delivery the original engines were employed on lease. U 2 was given a small conning tower in 1915.

Modernizations 5.

1915, U1, 3.1916, U2: petrol engines were replaced by diesels (640hp)

1917, both: + 1 x 1 - 37/20 SFK L/23 H

1/1918, both: - 1 x 1 - 37/20

Naval service

During the war both units served as training boats and were declared obsolete on 11 January 1918; both were ceded to Italy as war reparations in 1920 and scrapped at Pola.