Engineering:Brazilian submarine Humaitá (S41)

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Short description: Brazilian submarine
For other ships with the same name, see Brazilian submarine Humaitá.
Humaitá in sea trials

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General characteristics
Class and type: Riachuelo-class submarine
Displacement: 1,900 t (1,900 long tons)[1]
Length: 70.62 m (231 ft 8 in)[1]
Beam: 6.2 m (20 ft 4 in)[1]
Draft: 5.8 m (19 ft 0 in)[1]
Propulsion:
  • 4 × MTU 12V 396 SE84 diesels[1]
  • 1 × Jeumont-Schneider EPM Magtronic electric[1]
  • 3,909 hp (2,915 kW)[1]
  • 1 × shaft[1]
Speed: 21 knots (39 km/h; 24 mph) surfaced/submerged[1]
Range:
  • 6,000 nmi (11,000 km; 6,900 mi) at 8 kn (15 km/h; 9.2 mph) surfaced[2]
  • 550 nmi (1,020 km; 630 mi) at 4 kn (7.4 km/h; 4.6 mph) submerged[2]
Endurance: 70 days[3]
Test depth: 400 m (1,300 ft)[4]
Complement: 32[1]
Sensors and
processing systems:		 DCNS Submarine Tactical Information and Command System[1]
Electronic warfare
& decoys:
  • Thales DR 3000 ESM receiver[1]
  • ITT AR 900[1]
  • TSM 2233 Eledone[1]
  • Safare & S-Cube[1]
  • DCNS Contralto-V[1]
Armament:
  • 6 × 533 mm (21 in) torpedo tubes:[5][1]
    • 8 × SM-39 Exocet or MANSUP anti-ship missiles
    • 18 × F21 heavy torpedoes
    • 30 × naval mines

Humaitá (S41) is a Brazilian Riachuelo-class submarine built for the Brazilian Navy by ICN in Itaguaí, and DCNS.

The Brazilian boats are larger in length, tonnage and cargo capacity compared to the original French project. The Brazilian version are 70.62 m (231 ft 8 in) and 1,900 tons, compared to the original Scorpènes that are 61.7 m (202 ft 5 in) and 1,565 tons.[6]

Program history

In 2008, Brazil purchased four enlarged Scorpènes for USD 10 billion with a total technology transfer agreement and a second agreement to develop the first Brazilian nuclear-powered submarine, missing name. The hull of Riachuelo was laid down at Cherbourg, France on 27 May 2010 and it was jumboized at the Brazilian Navy Shipyard in Itaguaí in late 2012.[2]

The first submarine Riachuelo was launched on 14 December 2018, and began sea trials in September 2019,[7] the Humaitá was launched on 11 December 2020.[8]

Development and design

The first stage of construction of the Humaitá took place in September 2013 in Brazil, at the headquarters of ICN in Itaguaí, with the cutting of the first steel plates of the structure.[9] At this point, technology transfer from French technicians to Brazilians had already started.[10]

The other boats of the Brazilian class are Riachuelo (S40), Tonelero (S42) and Angostura (S43).[1]

Namesake

Humaitá is the fifth boat and the third submarine of the Brazilian Navy to receive this name, in honor of a military operation, which took place in 1868, in the Paraguayan War.[11]

The other submarines were:

  • S Humaitá (S14) - Submarine of the Script error: The function "sclass" does not exist., used in World War II by the U.S. Navy, before being incorporated into the Brazilian Navy. (1957–1967)
  • S Humaitá (S20) - Submarine of the Script error: The function "sclass" does not exist.. (1973–1993)

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 "Submarino "Riachuelo" reforça a soberania do País na Amazônia Azul" (in pt). 1 September 2022. https://www.marinha.mil.br/agenciadenoticias/submarino-riachuelo-reforca-soberania-do-pais-na-amazonia-azul. 
  2. ↑ 2.0 2.1 2.2 Cite error: Invalid <ref> tag; no text was provided for refs named defpro
  3. ↑ "Submarinos (Classe Riachuelo)" (in pt). 5 September 2022. https://www.marinha.mil.br/meios-navais/submarinos-classe-riachuelo. 
  4. ↑ Beatriz Freitas Pereira (3 December 2020). "S-41 Humaitá pronto para ser lançado". https://www.defesanet.com.br/prosub/noticia/38954/S-41-Humaita-pronto-para-ser-lancado-/. 
  5. ↑ Joao Paulo Zeitoun Moralez (2 September 2021). "La Marina de Brasil incorpora el primer submarino de la Clase Riachuelo". https://www.pucara.org/post/la-marina-de-brasil-incorpora-el-primer-submarino-de-la-clase-riachuelo. 
  6. ↑ "Diferenças entre o submarino Scorpène e o S-BR brasileiro" (in pt). 7 December 2018. https://www.naval.com.br/blog/2018/12/07/diferencas-entre-o-submarino-scorpene-e-o-s-br-brasileiro. 
  7. ↑ "Submarino Riachuelo inicia provas de mar" (in pt). Poder Naval. 25 September 2019. https://www.naval.com.br/blog/2019/09/25/submarino-riachuelo-inicia-provas-de-mar/. 
  8. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named launch-humanita
  9. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named poder naval
  10. ↑ "Marinha do Brasil PROSUB" (in pt). https://www1.mar.mil.br/prosub/construcao. 
  11. ↑ "NAVIOS DE GUERRA BRASILEIROS - 1822 - Hoje" (in pt). http://www.naval.com.br/ngb/R/Let-R.htm. 



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