NAVYPEDIA

Photo

Surasdra 1950

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
ตราด [Trad]	11		CRDA, Monfalcone, Italy	2.1934	29.9.1935	3.1936	stricken 11.1975
ภูเก็ต [Puket]	12		CRDA, Monfalcone, Italy	1.1934	26.10.1935	3.1936	stricken 11.1975
ปัตตานี [Patani]	13		CRDA, Monfalcone, Italy	3.1935	28.11.1936	10.1938	stricken 11.1975
สุราษฎร์ [Surasdra]	21		CRDA, Monfalcone, Italy	3.1935	14.11.1936	10.1938	stricken 11.1977
จันทบุรี [Chanrdaburi]	22		CRDA, Monfalcone, Italy	6.1936	26.11.1936	10.1938	stricken 12.1976
ระยอง [Rayong]	23		CRDA, Monfalcone, Italy	6.1936	16.12.1936	10.1938	stricken 12.1976
ชุมพร [Chunphorn]	31		CRDA, Monfalcone, Italy	7.1936	12.1.1937	10.1938	stricken 11.1975
ชลบุรี [Chonburi]	32		CRDA, Monfalcone, Italy	8.1936	18.1.1937	10.1938	sunk 17.1.1941
สงขลา [Songhkla]	33		CRDA, Monfalcone, Italy	8.1936	10.2.1937	10.1938	sunk 17.1.1941

Technical data

Displacement standard, t	318
Displacement full, t	470
Length, m	66.8 pp 68.0 oa
Breadth, m	6.40
Draught, m	2.13
No of shafts	2
Machinery	2 sets Parsons geared steam turbines, 2 Yarrow boilers
Power, h. p.	9000
Max speed, kts	31
Fuel, t	oil 102
Endurance, nm(kts)	1700(15)
Armament	3 x 1 - 76/40 12pdr 12cwt QF Mk I/II/V, 2 x 1 - 20/65 Breda 1939, 4 x 1 - 8.80, 2 x 2 - 450 TT, 2 x 1 - 450 TT
Complement	70

Standard scale images

Graphics

Project history

Successful enough small fast ships for actions in constrained harbour areas. Two first torpedo boats (Trad and Phuket) were ordered to CRDA in 1934, remaining 7 ships under the 1935 programme. They were designed on basis of Italian Spica class torpedo boat, being as though their moderated version. 76mm artillery was delivered by Vickers-Armstrong for unification of an ammunition with already commissioned ships. On an TTs arrangement ships reminded German WWI-era torpedo boats: 2 twin banks were installed on centre line and 2 single TTs were installed aside behind a forecastle break. As well as the majority of Italian-built ships, on trials they exceeded designed speed: in particular, Phuket shown 32.34kts at 10000hp.

Modernizations

1960s, Trad, Puket, Chunphorn: - 1 x 1 - 76/40, 4 x 1 - 8.80, 1 x 2 - 450 TT, 2 x 1 - 450 TT; + 2 x 1 - 40/60 Mk 3, presumably radar

1960s, Patani, Surasdra, Chandraburi, Rayong: - 1 x 1 - 76/40, 4 x 1 - 8.80, 2 x 1 - 450 TT; + 1 x 1 - 40/60 Mk 3, presumably radar

Naval service

Chonbury and Songkhla were sunk 17.1.1941 in battle at Ko-Chang by gunfire of French cruiser Lamotte-Picquett and avisos Amiral Charner, Dumont D`Urville, Tahure, Marne. Contrary to judgement spread in literature, Trad did not participate in battle and was not been lost.