Bahia 1910
Bahia 1939
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Bahia | Armstrong, Newcastle, UK | 19.8.1907 | 20.1.1909 | 2.3.1910 | sunk 4.7.1945 | ||
| Rio Grande do Sul | Armstrong, Newcastle, UK | 30.8.1907 | 20.4.1909 | 14.5.1910 | stricken 6.1948 |
|
Displacement normal, t |
3100 |
|
Displacement full, t |
3185 |
|
Length, m |
115.8 pp 122.4 oa |
|
Breadth, m |
11.9 |
|
Draught, m |
4.40 mean |
|
No of shafts |
3 |
|
Machinery |
3 Parsons steam turbines, 10 Yarrow boilers |
|
Power, h. p. |
18000 |
|
Max speed, kts |
26.5 |
|
Fuel, t |
coal 650 |
|
Endurance, nm(kts) |
6600(10) |
|
Armour, mm |
deck: 19 with 31mm slopes, CT: 76 |
|
Armament |
10 x 1 - 120/50 Armstrong CC, 6 x 1 - 47/40 Hotchkiss, 2 x 1 - 450 TT |
|
Complement |
350 |
Project history: Built under the 1906 law, supplementing the extensive shipbuilding programme
of 1904. Order was given out in May, 1907 to Armstrong, the subcontract on
engines production was received by Vickers.
Design was developed by J. Perret on a basis of British
cruisers Adventure and Attentive, but contained a number of innovations doing Brazilian ships one of most perfect on that moment. In particular, in the
design
using of steam turbines instead of VTEs of prototype has been included, and
also Bahia should exceed all available in the world or
built cruisers on maximal speed.
Bahia and Rio Grande do Sul had a hull structure typical for the time with a forecastle and poop.
Because of coal-firing long-term
keeping of full speed became problematic. On trials Baia has shown 27.02kts
at 20010hp; Rio Grande do Sul 27.41kts at 22830hp.
Ship protection: Protection was limited by 19mm deck, having 31mm slopes over machinery and magazines, and also 76mm conning tower.
Modernizations: (1925 - 1926, Nacional de Navegacao Costeira, Rio de Janeiro), both: machinery was fully replaced by 3 Brown-Curtis geared steam turbines, 6 Thornycroft oil-firing boilers, funnels were replaced by three new (22000hp, 28kts). - 2 x 1 - 47/40, 2 x 1 - 450 TT; + 4 x 1 - 76/40 EOC AA, 2 x 2 - 533 TT
1942 - 1945, both: - 4 x 1 - 47/40; + (6 - 8) x 1 - 20/70 Mk 4, 2 DCT, radar, sonar
Naval service: Bahia was lost 4.7.1945 off island Sao Paolo from explosion of own DCs, called by casual shot from own 20mm MG during gunnery training. Rio Grande do Sul was stricken from fleet inventory 8.6.1948 and broken up.
Bahia 1936
© Ivan Gogin, 2011-15