NAVYPEDIA

Photo

81T 1917 Many thanks to Wolfgang Stöhr for additional information on this page.

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
74T		466	STT, San Marco	4/1913	28.8.1913	6/1914	to Romania 1920 (Viforul)
75T		467	STT, San Marco	5/1913	20.11.1913	7/1914	to Romania 1920 (Vartejul)
76T		468	STT, San Marco	6/1913	15.12.1913	7/1914	to Yugoslavia 1920 (T1)
77T		469	STT, San Marco	8/1913	30.1.1914	8/1914	to Yugoslavia 1920 (T2)
78T		470	STT, San Marco	10/1913	4.3.1914	8/1914	to Yugoslavia 1920 (T3)
79T		471	STT, San Marco	12/1913	30.4.1914	9/1914	to Yugoslavia 1920 (T4)
80T		472	STT, San Marco	12/1913	3.8.1914	11/1914	to Romania 1920 (Vijelia)
81T		473	STT, San Marco	2/1914	6.8.1914	12/1914	to Romania 1920 (Sborul)

Technical data

Displacement normal, t	262
Displacement full, t	320
Length, m	58.2 wl 57.3 pp
Breadth, m	5.70
Draught, m	1.50
No of shafts	2
Machinery	2 Parsons steam turbines, 2 Yarrow boilers
Power, h. p.	5000
Max speed, kts	28
Fuel, t	coal 18 + oil 24
Endurance, nm(kts)	980(16)
Armament	2 x 1 - 66/27 G. L/30 K.09, 2 x 2 - 450 TT, 10 - 12 mines
Complement	39

Standard scale images

Graphics

Project history

In 1910 the Naval Technical Committee ordered the development of a 275t coastal torpedo-boat, capable of sustaining 30kts for 10 hours (this being the duration of a passage from Cattaro to the Otranto Straits, time to gain contact and attack before morning, and return at full speed - four years before the war such torpedo-boat attacks on enemy forces blockading the Otranto Straits were clearly predicted). Turbines, diesel and turbo-electric propulsion were discussed, but the decision was quickly made: diesels in the necessary dimensions were not available; and turbo-electric propulsion would not be advisable without the practical experience gained by running a test vessel. Of the two yards competing, STT won the contract for eight boats. Although their particulars were very nearly those requested by the Navy for the coastal torpedo-boat, they were classified as sea-going boats. Being the first Austrian turbine-powered small units, it is not surprising that the first boats experienced constant troubles with their machinery. Initially they were to be armed with 3-66mm/30 guns and 3 TT (1 x 2, 1 x 1) but for reasons of standardization they received the same armament as the following Danubius-built class.

Modernizations

1914, all: + 1 x 1 - 8.80

1917, all: - 1 x 1 - 66/27; + 1 x 1 - 75/27 G. L/30 K.16 BAG

Naval service

All boats saw active service on convoy, submarine hunting, escort and minesweeping duties, and all survived the war. Tb74, 75, 80 and 81 were allocated to Rumania in 1920, the first three being stricken in 1927, but Sborul was in service until 1958. Tb 76-79 were allocated to Yugoslavia: T4 was lost after stranding in 1932; T2 was stricken in 1939; T1 and T2 were incorporated into the Italian Navy in April 1941, under their old designations. After the collapse of Mussolini's empire, the former T1 was returned to the navy of the independent Croatian state on 7 December 1943 renamed Golesnica and served with the later Yugoslavian Navy until 1959. The former T2 also became part of the navy of independent Croatia in 1943, but served as the German TA48 with an exclusively Croatian crew; she sank after suffering bomb hits on 20 February 1945 at Trieste.

Many thanks to Wolfgang Stöhr for additional information on this page.