products

Retractable propulsion


Available in TITANIUM and STAINLESS STEEL

The development of the Retractable Propulsion unit started in 2004 as a request for the ABN-Amro racing yachts, participating the Volvo Ocean Race (VOR).

The idea was to have as less resistance under the water line as possible; the idea of the Retractable Propulsion Solution was born.  At that time all the parts were made out of stainless steel. After a successful race the main issue for the next model was saving weight.

After an extensive period of design and engineering amartech introduced the RPS  made out of titanium and with the propeller made out of Carbon for the racing yachts participating the VOR 2008 – 2009.

In the mean time the Amartech RPS has been adapted by many racing yachts as well as by leisure sailing yachts and sailing catamarans striving to the best possible sailing performance.

Finite elements calculations

The load deviation and vibration characteristics have been calculated on all single parts with finite element calculations.

Mounted in the hull

The RPS has to be mounted in a (carbon) cassette into the hull, the engineering of this part is not included in the scope of supply.

The system has the following features:

  • Suitable for engine powers up to 100 hp
  • No drag of the propulsion unit
  • Ultra light design
  • Optimum propeller design


The Amartech Retractable Propulsion Solutions are available in two versions:

Ultra Light Version 

  • Bracket, coupling and shaft made out of titanium
  • Stern tube made out of carbon
  • Propeller made out of carbon, custom designed for each yacht for highest efficiency
  • The total weight of the complete RPS (excluding cassette) is only 13 kgs.

 
Light Weight Version

  • Bracket, coupling and shaft made out of Duplex 4462
  • Stern tube made out of epoxy
  • Propeller made out of NiAlBr, custom designed for each yacht for highest efficiency
  • The total weight of the complete RPS (excluding cassette) is only 45 kgs.