NAVYPEDIA

Photo

PT812

Ships

No	Name	Yard No	Builder	Laid down	Launched	Comm	Fate
PT812			Philadelphia N Yd	10.1949	1.2.1951	5.1951	auxiliary 11.1959

Technical data

Displacement standard, t
Displacement full, t	102
Length, m	30.5 wl 32.0 oa
Breadth, m	6.71
Draught, m	1.65
No of shafts	4
Machinery	4 Packard diesels
Power, h. p.	10000
Max speed, kts	38.2
Fuel, t	petrol
Endurance, nm(kts)
Armament	2 x 1 - 40/60 Mk 3, 2 x 2 - 20/70 Mk 24, 1 x 1 - 81/12 M29 mortar, 4 - 572 TR (never really carried), 4 DC
Electronic equipment	SPS-5 radar
Complement	17

Graphics

Project history

PT809-812 were intended to embody wartime design lessons. All were aluminium; 809 was riveted, 810 riveted and welded, and 811 and 812 all-welded; each was designed to mount two single 40mm guns (one in 812), two twin 20mm, one 81mm mortar, one Mk 107 rocket launcher (812 only), four torpedo racks, and four depth charge racks; speed was set at 46kts (43 for the somewhat longer 812). Although these figures represented a considerable advance on Second World War practice, they still did not make up for the lack of an operational requirement for such coastal craft.

Modernizations

1956: was re-engined with 2 4000shp gas turbines on outboard shafts and 2 800bhp dieses on inboard shafts with CPPs (9600hp).

Naval service

: In November 1959 PT812 was transferred to US Army as Small Boat No1 an was transferred to South Korea in April 1960.

© Ivan Gogin, 2015