Rudder post for rudders for water vehicles

Abstract

The rudder post ( 40 ) for rudders for water vehicles has end sections ( 41, 42 ) made of a metallic material, in particular of wrought iron, and a mid post section ( 45 ) made of a nonmetallic material connected with the end sections so that the rudder post has a relatively low weight even for a very big length by maintaining a high flexural strength and torsion stiffness.

1 . Rudder post for rudders for water vehicles, wherein the rudder post ( 40 ) has end sections ( 41 ,  42 ) made of a metallic material, in particular of wrought iron, and a mid post section ( 45 ) made of a nonmetallic material connected with the end sections ( 41 ,  42 ).  
   
   
       2 . Rudder post according to  claim 1 , wherein the mid post section ( 45 ) of the rudder post ( 40 ) made of a nonmetallic material is made of a fiber composite material or of carbon fibers, preferably of graphite fibers.  
   
   
       3 . Rudder post according to  claim 1 , wherein both end sections ( 41 ,  42 ) of the rudder post ( 40 ) made of wrought iron are provided at their front sides turned to each other with neck-type reduced journal-shaped sections ( 51 ,  52 ), the peripheral surfaces of which are provided with structures ( 51   a ,  52   a ) as adhesive surfaces for the mid post section ( 45 ) made of carbon fibers which surround the journal-shaped sections ( 51 ,  52 ) in form of windings ( 60 ) on the end sections ( 41 ,  42 ), whereby the carbon fibers are coated and filled wih a cast resin in the whole winding area which extends over the length of the mid section ( 45 ).  
   
   
       4 . Rudder post according to  claim 1 , wherein the ratio of the length of the end sections ( 41 ,  42 ) and of the mid post section ( 45 ) of the rudder post ( 40 ) is ⅙ to ⅔.  
   
   
       5 . Rudder post which is placed in a rudder port bearing ( 20 ) according to  claim 1 , wherein the rudder post ( 40 ) has material reinforcements in the area of the bearings ( 70 ,  71 ) placed in the rudder port bearing ( 20 ).  
   
   
       6 . Rudder post according to  claim 5 , wherein the material reinforcements ( 80 ) are provided in the area of the rudder port bearing end ( 20   b ).  
   
   
       7 . Rudder post according to  claim 5 , wherein the material reinforcements ( 80 ) are configured in the area of the inner bearing ( 70 ) provided on the rudder port bearing ( 20 ).