NAVYPEDIA

Photo

BK-506  

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
БК-501 [BK-501], 11.1946- МКЛ-27 [MKL-27], 2.1949- БК-501 [BK-501]			194 Yd, Leningrad	10.1942	11.4.1943	9.1943	stricken 10.1949
БК-502 [BK-502], 11.1946- МКЛ-28 [MKL-28], 2.1949- БК-502 [BK-502]			194 Yd, Leningrad	11.1942	5.1943	9.1943	stricken 10.1949
БК-503 [BK-503], 11.1946- МКЛ-29 [MKL-29], 2.1949- БК-503 [BK-503]			194 Yd, Leningrad	1.1943	5.1943	8.1943	stricken 10.1949
БК-504 [BK-504]			194 Yd, Leningrad	2.1943	5.1943	7.1943	sunk 4.7.1944
БК-505 [BK-505], 11.1946- МКЛ-31 [MKL-31], 2.1949- БК-505 [BK-505]			194 Yd, Leningrad	3.1943	7.1943	8.1943	stricken 11.1957
БК-506 [BK-506], 11.1946- МКЛ-32 [MKL-32], 2.1949- БК-506 [BK-506]			194 Yd, Leningrad	4.1943	7.1943	8.1943	stricken 11.1957
БК-507 [BK-507], 11.1946- МКЛ-33 [MKL-33], 2.1949- БК-507 [BK-507]			194 Yd, Leningrad	5.1943	8.1943	9.1943	stricken 3.1958
БК-508 [BK-508], 11.1946- МКЛ-34 [MKL-34], 2.1949- БК-508 [BK-508]			194 Yd, Leningrad	6.1943	19.9.1943	10.1943	stricken 3.1958
БК-509 [BK-509]			194 Yd, Leningrad	1943	autumn 1943	10.1943	sunk 4.7.1944
БК-510 [BK-510], 11.1946- МКЛ-35 [MKL-35], 2.1949- БК-510 [BK-510]			194 Yd, Leningrad	7.1943	24.10.1943	10.1943	stricken 3.1958
БК-511 [BK-511], 11.1946- МКЛ-36 [MKL-36], 2.1949- БК-511 [BK-511]			194 Yd, Leningrad	11.1943	25.4.1944	5.1944	stricken 11.1957
БК-512 [BK-512], 11.1946- МКЛ-37 [MKL-37], 2.1949- БК-512 [BK-512]			194 Yd, Leningrad	11.1943	27.4.1944	7.1944	stricken 11.1957
БК-513 [BK-513], 11.1946- МКЛ-38 [MKL-38], 2.1949- БК-513 [BK-513]			194 Yd, Leningrad	12.1943	5.1944	6.1944	stricken 11.1957
БК-514 [BK-514]			194 Yd, Leningrad	1943	spring 1944	6.1944	sunk 4.7.1944
БК-515 [BK-515], 11.1946- МКЛ-39 [MKL-39], 2.1949- БК-515 [BK-515]			194 Yd, Leningrad	12.1943	1.6.1944	7.1944	stricken 11.1957
БК-516 [BK-516], 11.1946- МКЛ-1 [MKL-1], 2.1949- БК-516 [BK-516]			194 Yd, Leningrad	3.1944	22.7.1944	8.1944	stricken 7.1956
БК-517 [BK-517], 11.1946- МКЛ-2 [MKL-2], 2.1949- БК-517 [BK-517]			194 Yd, Leningrad	3.1944	4.8.1944	8.1944	stricken 7.1956
БК-518 [BK-518], 11.1946- МКЛ-3 [MKL-3], 2.1949- БК-518 [BK-518]			194 Yd, Leningrad	5.1944	30.8.1944	9.1944	stricken 7.1956
БК-519 [BK-519], 11.1946- МКЛ-4 [MKL-4], 2.1949- БК-519 [BK-519]			194 Yd, Leningrad	5.1944	9.1944	9.1944	stricken 9.1955
БК-520 [BK-520], 11.1946- МКЛ-5 [MKL-5], 2.1949- БК-520 [BK-520]			194 Yd, Leningrad	6.1944	9.1944	10.1944	stricken 7.1956

Technical data

Displacement standard, t	151
Displacement full, t	158
Length, m	36.2
Breadth, m	5.50
Draught, m	1.28
No of shafts	2
Machinery	2 Packard petrol engines
Power, h. p.	2400
Max speed, kts	13
Fuel, t	petrol 9
Endurance, nm(kts)	450(10)
Armour, mm	belt: 50 - 25, deck: 30 - 15, turrets: up to 45, CT: 8
Armament	2 x 1 - 76/40 F-34, 2 x 1 - 45/65 21KM, 1 x 1 - 37/63 70K, 2 x 1 - 12.7/79
Complement	38

Standard scale images

Graphics

Project history

"Seagoing armoured motor gunboats". Wartime design was created in 1941-1942 on the basis of pre-war project 138, originally adapted for building in conditions of beleaguered Leningrad: in particular, she had simplified rectilinear hull form, lend-lease engines and turrets from T-34 tank as originally was planned. Boats differed by strong armament: under design 2 76mm guns, 1 37mm MG, 2 82mm mortars; but already since lead boats they instead of mortars had 45mm guns. Protection of serial boats frequently differed from designed: armour plates which are available at present on a factory were used. The design was approved 15.9.1943: one week prior to commission of lead boat.

Survived MBKs in 1946-1949 were classified as small gunboats.

Ship protection

Belt had 52-50mm thickness abreast citadel and was closed by 14mm fore and 48-30mm aft bulkheads, it was connected with 35-30mm deck. Ship ends outside citadel were protected by 18-14mm belt and 18-12mm deck.

Modernizations

None.

Naval service

BK-504, BK-509 and BK-514 were sunk by German mines 4.7.1944.