NAVYPEDIA

Photo

Hayashio 1962

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
はやしお [Hayashio]	SS521		Shin Mitsubishi, Kobe	6.6.1960	31.7.1961	30.6.1962	discarded 7.1977
わかしお [Wakashio]	SS522		Kawasaki, Kobe	7.6.1960	28.8.1961	17.8.1962	discarded 3.1979

Technical data

Displacement standard, t
Displacement normal, t	650 / 800
Length, m	59.0
Breadth, m	6.50
Draught, m	4.10 max
No of shafts	2
Machinery	2 Kobe Mitsubishi / Sulzer 6LDA25B diesel-generators, 2 Mitsubishi Electric electric motors
Power, h. p.	1350 / 1700
Max speed, kts	12 / 15
Fuel, t	diesel oil
Endurance, nm(kts)	4000(10) /
Armament	3 - 533 TT (bow, 9)
Electronic equipment	ZPS-2 radar, JQS-2, JQO-3, JQO-4 sonars, ZLR-1 ECM suite
Complement	43
Diving depth operational, m	150

Standard scale images

Graphics

Project history

Constructed under the 1959 programme, these boats and their near-sisters, the Natsushio class, were small and limited in capability. They were air-conditioned and had good habitability and a large safety factor. They were modelled after the US Barracuda and were somewhat shorter and thicker than Oyashio. In order to reduce hull resistance, an effort was made to produce a perfect a perfect double hull, external framing was used in order to improve internal space. Attention was paid to improving underwater manoeuvrability, and a 'jostick' was installed for steering. The class used a water pressure system for launching torpedoes, thus eliminating the emission of air bubbles. The main storage batteries were water-cooled.

Modernizations

None.

Naval service

No significant events.