| 摘要 |
Partially submerged disc with variable pitch blades provided for installation to articulated transom consists of hub of sufficient size (14) flanged to main shaft (13) with number of inner flanges (16) actuated by linear movement of joke (11) to transfer rotation via short inserts (19) to propulsor blades (15). All other parts are usually encountered in well-proven CPP and stern tube systems. This kind of integration of the propulsor into slender, displacement type hull results in steady flow within selected bottom segment, ability to control fluctuating forces either by choice of low profile at the blade-entry and blade-exit positions or by choice of blade number with respect to active angular size of the bottom segment and yet, utilizing benefits of low resistance of hull with raunded sections, horizontally oriented thrust, possible installation of propulsor on cut stern to enable contribution of blade drag force to the propulsive thrust, the total efficiency of hull-propulsor is expected to overcome efficiency obtainable by conventional partially submerged propeller installation while, due to mechanical/hydrodinamical configuration capability of new propulsor to overcome power limitation of conventional system is evident. |
