Propulsion and Power Concept
Apart from the main propulsion of the 2HE-2 through the sails, a secondary electrical power system is mounted. Basically a purely electrical powering for harbor and anchor maneuvers should be able to be maintained for at least 120 min / 16 NM*. The power supply of the general electrical components such as the navigational instruments, lighting, refrigerators and freezers is ensured by the solar panels. The necessary areas for this purpose are located on the deck house. While at anchor, wind turbines can be used as a support if necessary. Aside from the secondary powering, the breathing air compressors are the largest consumers of energy.
They are powered through three-phase-AC current inverters from batteries, ensuring for enough capacity to sustain a 3 hour operation. These and the traction batteries are charged at sea by a hydrogen generator (drag generator). Especially on downwind courses, excess power from the large fore sails (spinnakers, etc.) is used for conversion into electrical energy. For unfavourable conditions (low solar radiation, calm winds) with nautical or medical necessities, sufficient reserve capacity must be available.
The optimal solution, especially with regard to a powerful hydrogen generator, is currently still a point of our R&D activities in cooperation with several technical universities and relevant suppliers.
*NM: nautical mile (1.852 kilometer)