NAVYPEDIA

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Gruno 1940

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Brinio			Rijkswerf Amsterdam	10.1911	12.8.1912	9.1914	scuttled 14.5.1940
Friso			Rijkswerf Amsterdam	11.1911	29.8.1912	7.1915	sunk 12.5.1940
Gruno	F81		Rijkswerf Amsterdam	2.1912	26.5.1913	7.1915	minesweeper depot ship 5.1944

Technical data

Displacement standard, t	Brinio: 545 Friso: 530 Gruno: 533
Displacement full, t	Brinio: 634 Friso: 573 Gruno: 581
Length, m	52.7
Breadth, m	8.52
Draught, m	2.75 max
No of shafts	2
Machinery	Brinio: 2 diesels Friso: 2 Werkspoor diesels Gruno: 2 MAN / Smit diesels
Power, h. p.	1200
Max speed, kts	14
Fuel, t	diesel oil 34
Endurance, nm(kts)	1440(6)
Armour, mm	belt: 55, bulkheads: 55, deck: 17, shields: 50, CT: 50
Armament	4 x 1 - 105/47 Krupp Nr.2, 2 x 1 - 12.7/90
Complement	52

Standard scale images

Graphics

Project history

Small shallow-draught gunboats projected for needs of coast defence of mother country: in particular, for support of torpedo boats attacks and protection of minefields. The original project, differing presence of a narrow belt protected approximately 70% of hull length. They received very unreliable diesels that has compelled in further them to change. To the Second World War beginning gunboats were considered become outdated, especially in view of absence of air defence weapons.

Ship protection

Citadel was protected by 55mm belt, closed by 55mm transverse bulkheads at ship ends. 17mm deck was connected with upper edge of the belt. Gun shields had 50mm faces, 20mm sides and 25mm roofs.

Modernizations

1917, Gruno: diesels were replaced by 2 6-cyl 2-stroke Germania (1500hp, 14kts)

1928, Friso: diesels were replaced by 2 6-cyl 4-stroke MAN (1500hp, 14kts)

1932, Brinio: diesels were replaced by 2 6-cyl 2-stroke Sulzer (1500hp, 14kts)

1941, Gruno: + 2 x 1 - 40/39 QF Mk VIII, 2 DCR

Naval service

Friso 12.5.1940 was damaged by German aircraft and sunk by gunfire of minesweeper Peter Florisz at Stavoren; wreck was raised 15.3.1943 and handed over on demolition. Brinio 12.5.1940 was damaged by German aircraft at Ijmuiden and 14.5.1940 scuttled by crew; wreck was raised by Germans 12.10.1942 and broken up. Gruno in May, 1940 escpaped to UK and laid up into reserve in March, 1942; she was commissioned again 23.11.1942, again laid up 16.5.1944 and up to an exception from fleet list in January, 1950 was used as minesweeping boat depot ship.