Abstract
Contra - Rotating Hybrid Type Rudder Propeller is of the new development-type hybrid device ZP-41RP. It was installed in one of the overseas research purse seiners“Nippon-Maru”. The device consisted of one electromotive motor drive rudder propeller device belonging to in a conventional main engine drive variable-pitch propeller; and to the rear for a contra-propelling effect. We therefore here introduce the summary of the Contra - Rotating Hybrid Type Rudder Propeller.
