Back to news

January 14, 2021 | International, Naval

Naval Group prints first propeller for powering French warship

By:

PARIS — France's Andromède mine-hunting ship is now being propelled by a 3D-printed propeller designed and manufactured by Naval Group, the company announced on Wednesday.

Emmanuel Chol, director of Naval Group's Nantes-Indret site where the propeller was made, said, “It is the largest metal 3D-printed thruster ever to have been manufactured and the first propeller resulting from this technology, embarked on board a military ship and manufactured for use beyond just sea trials.”

Weighing 1 metric ton, the propeller is made of five 200 kg (441 pounds) blades which were manufactured using a wire arc additive manufacturing (WAAM) procedure, less well known than other metal 3D printing techniques but better suited for large-scale applications. It works by melting metal wire heated by an electric arc. The process is controlled by a robotic arm.

The French subsidiary of the Japanese group Yaskawa provided the robots and manufacturing tools for this project.

Naval Group worked with Bureau Veritas to guarantee that the testing, inspection and certification requirements (like corrosion, fatigue, shock resistance) were met so that the Fleet Support Services organization and the DGA French procurement agency could authorize the trial of the blades on a military ship.

The propeller was transferred from the manufacturing site to Brest in October 2020 where it was mounted on the propeller shaft of the Andromède. The ship is one of France's 10 Tripartite mine hunters built in the 1980s, eight of which – including the Andromède – will not be retired for another decade.

Sea trials in December were successful, so now the mine-hunter can return to normal operations, equipped with its printed propeller.

Eric Balufin, director of Naval Group's site in Brest says “the assembly of this 3D-printed propeller shows great promise for the future. This new technology will enable us to considerably reduce technical constraints, and therefore allow for new manufacturing solutions for complex geometrical shapes which cannot be produced through conventional processes.”

https://www.defensenews.com/global/europe/2021/01/13/naval-group-prints-first-propeller-for-powering-french-warship/

On the same subject

  • Rafaut acquiert Secapem

    January 13, 2021 | International, C4ISR

    Rafaut acquiert Secapem

    DEFENSE Rafaut acquiert Secapem Rafaut vient d'acquérir Secapem, une PME innovante spécialisée dans les systèmes d'entraînement des forces armées. « Avec cette opération, le chiffre d'affaires de Rafaut, un peu au-dessus de 90 millions d'euros, va s'approcher des 100 millions d'euros », précise Nicolas Orance, directeur général du groupe, qui souligne que Rafaut entre, avec cette opération, dans « une phase plus active d'acquisitions, pour répondre aux enjeux de taille critique, en ayant toujours à l'esprit de maintenir la complémentarité entre le civil et la défense ». Le modèle dual du groupe, civil et militaire, est en effet gage de résilience. Le rachat de Secapem permet à Rafaut d'acquérir des activités liées aux systèmes d'entraînement au tir réel et des solutions de scoring hautes technologies pour les forces armées, précise L'Usine Nouvelle. L'opération concerne aussi Lun'tech, filiale de Secapem depuis 2013, qui propose des solutions complémentaires pour l'entraînement aux tirs guidés par radar. L'Usine Nouvelle du 13 janvier

  • USAF, Navy Concluding Five-Year Microwave Weapon Test

    July 15, 2022 | International, Naval

    USAF, Navy Concluding Five-Year Microwave Weapon Test

    The US Navy and Air Force Research Laboratory are wrapping up a five-year joint effort to develop high-power microwave technology.

  • Marines increase ways to detect and kill air threats, from hobby drones to cruise missiles

    August 7, 2018 | International, Land

    Marines increase ways to detect and kill air threats, from hobby drones to cruise missiles

    By: Todd South As Marine units face evolving drone threats from terrorist organizations and at the same time shore up their air defenses against near-peer air attacks, a few key pieces of gear in the most recent defense bill could vastly strengthen overhead protection. Until recently, Marines tasked with taking down drones or short-range missiles had to link into a vast array of detection devices and then perform a practically 20th century task to take them out. Essentially, a Marine with binoculars scans the air for drones while another Marine zeroes in with a Stinger missile ― first fielded in the 1980s but upgraded since ― to shoot down what is often a few hundred dollars' worth of a patched together, weaponized or surveillance-type commercial drone. But a review of the past five years of Marine Corps budget requests and approvals for two systems, the Ground Based Air Defense-Transformation, or GBAD, and the Ground/Air Task-Oriented Radar, or G/ATOR, have more than doubled in the past five years and are projected to maintain or increase from now until 2022, when a GBAD with a laser component is expected to field. Beginning as far back as 2013, the Marines have been purchasing the G/ATOR, an advanced radar system that executes the function of a combined five legacy systems. Full Article: https://www.marinecorpstimes.com/news/your-marine-corps/2018/08/06/marines-increase-ways-to-detect-and-kill-air-threats-from-hobby-drones-to-cruise-missiles/

All news