Tag Archives: Riachuelo (S40)

Brazilian Scorpène

According to Poder Naval, the submarine Riachuelo (S40), the first of four S-BR (modified Scorpène class) diesel-electric attack submarines of the Submarine Development Program (Prosub), started her sea trials on September 25, 2019.

The Brazilian Navy’s first license-built Scorpène submarine, Riachuelo (S40), at the Itaguaí Naval Complex while preparing for her sea trials. These are due to last for the first half of 2020, with commissioning to follow in October 2020 (Twitter photo)

Sea trials are scheduled to last until the first half of 2020, while boat’s commissioning is scheduled for October 2020.

Riachuelo (S40) was launched at a ceremony held at the Itaguaí Naval Complex on December 14, 2018.

A 533-mm heavy F21 torpedo from the Naval Group and a test Exocet SM39 Block 2 Mod 2 anti-ship missile are expected to be launched during the Riachuelo sea trials, the Navy said.

The Riachuelo will be followed by three more submarines: the Humaitá (S41), scheduled for launch in 2020, the Tonelero (S42) in 2021 and the Angostura (S43) in 2022.

To assembly site

On January 13 and 14, the Brazilian Navy (MB) and the company Itaguaí Construções Navais (ICN) transferred three sections of the Riachuelo (S40) submarine to the Madeira Island shipyard, in the Itaguaí Naval Complex.

Brazil’s first Scorpene submarine Riachuelo (S40) moved to assembly site
Brazil’s first Scorpene submarine Riachuelo (S40) moved to assembly site

Riachuelo is the first submarine of the Submarine Development Program (PROSUB), which provides for three more conventional boats as well as the first Brazilian submarine with nuclear propulsion.

The five-kilometer journey was completed in 11 hours, starting at the Steel Structures Manufacturing Unit (UFEM), which is also located in Itaguaí, Rio de Janeiro (RJ) state. The logistics operation required a month’s planning and included the removal of stretches of the electricity grid.

The most complex stage of the operation occurred on January 14, when traffic had to be suspended on the BR-493 road to allow passage of the 320-wheeled special vehicle that transported the 619 tons of the three sections, which measured 39.86 meters/131 feet in length and 12.30 meters/40 feet in height.

The remaining two sections of the Riachuelo, weighing 487 tonnes and measuring 30 meters/98 feet, will soon be transferred separately to the Construction Shipyard, where the submarine will enter final assembly.

The aim is to launch the boat into the sea during the second half of 2018.

The other three diesel-electric submarines, Humaita (S41), Tonelero (S42) and Ango Stura (S43), are all at different stages of construction at UFEM.