Naval Group equips French Navy minehunter with AM propeller

February 3, 2021

The AM propeller is only a first step for Naval Group, who hope to employ more additively manufactured parts in the future (Courtesy Naval Group)

Naval Group, headquartered in Paris, France, has additively manufactured a propeller which has a 2.5 m span and consists of five 200 kg blades, for use on a French Navy minehunter. The ship’s propeller, reported to be the largest metal additively manufactured thruster of its kind, was built at Naval Group’s facility in Nantes-Indret in October 2020, using a wire-based Directed Energy Deposition (DED) process.

After arriving in Brest, the propeller was transferred to a submarine base to be mounted onto the intermediate shaft of the FS Andromède minehunter. Sea trials were successfully performed at the end of December and the propeller will now enter service in all of its operational missions.

The harsh conditions in which these ships operate mean that they must meet strict requirements in order to allow the SSF (Fleet Support Services) and DGA (French Defence Procurement Agency) to authorise the trial of the blades in normal operating conditions. Naval Group worked together with Bureau Véritas, the second largest provider of compliance and certification services, in presenting its technical justification file, which received certification.

“Obtaining military naval quality requires rigorous development,” stated Emmanuel Chol, Director of the site at Nantes-Indret. “Nearly three years of R&D – carried out by the Technical and Innovation Department in cooperation with the École Centrale de Nantes within the framework of the LabCom Joint Laboratory of Maritime Technology – went into the development of the deposition process of metal wire fusion.”

This propeller is a first step for Naval Group. A new development phase, aimed at revamping the design of other parts to benefit from AM will soon begin, with hopes of achieving acoustic discretion, weight reduction, and increased productivity. Continued production of thrusters will provide ships with growing efficacy at sea, increasing thrust efficiency, stealth and lightening the vessels.

“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,” stated Eric Balufin, Director of the Naval Group site in Brest.

“This 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,” Chol added. “We witness a world first.”

In the latest issue of Metal AM magazine

Download PDF

Extensive AM industry news coverage, as well as the following exclusive deep-dive articles:

  • The GRCop story: The development, production and Additive Manufacturing of NASA’s rocket engine alloys
  • Formnext 2023: Innovations in metal Additive Manufacturing from the industry’s leading international exhibition
  • Cybersecurity in Additive Manufacturing: Securing the industry’s future
  • Additive Manufacturing in the jewellery industry: exploring the potential of platinum and titanium
  • Mission possible: The five-year plan to gain FAA and EASA acceptance of in-process monitoring

The world of metal AM to your inbox

Don't miss any new issue of Metal AM magazine, and get the latest industry news. Sign up to our twice weekly newsletter.

Sign up

Discover our magazine archive…

The free to access Metal Additive Manufacturing magazine archive offers unparalleled insight into the world of metal Additive Manufacturing from a commercial and technological perspective through:

  • Reports on visits to leading metal AM part manufacturers and industry suppliers
  • Articles on technology and application trends
  • Information on materials developments
  • Reviews of key technical presentations from the international conference circuit
  • International industry news

All past issues are available to download as free PDFs or view in your browser.

Browse the archive

Looking for AM machines, metal powders or part manufacturing services?

Discover suppliers of these and more in our comprehensive advertisers’ index and buyer’s guide, available in the back of Metal AM magazine.

  • AM machines
  • Process monitoring & calibration
  • Heat treatment & sintering
  • HIP systems & services
  • Pre- & post-processing technology
  • Powders, powder production and analysis
  • Part manufacturers
  • Consulting, training & market data
View online
Share via
Copy link
Powered by Social Snap