The RF90 is a hydraulic high performance reefing system for foresails built to be virtually maintenance free and with superior gear technology these systems offer maximum performance and longevity. The integration of spiral-mesh gearing, sophisticated bearing design and a self-braking worm gear, result in a quiet and smooth running system, which meet the highest industry standards. Moreover, the special emergency manual drive fitted to the RF 90 offers complete safety to the user. Through the simple insertion of a standard winch handle the hydraulic drive is uncoupled and switched to manual operation. Thanks to a special gear mechanism, which prevents transfer of the sail load to the winch handle, the reefing system can be operated easily and safely even in manual operation mode. All systems in this series are equipped with an easy to operate length adjuster for optimal trimming of mast and sail. The hydraulic supported length adjusters are available starting with model RF90-4.