Peräsimen rakenne: (HUOM! Viralliset mitat tarkista luokkasäännöistä)
Luokkasääntö, koskien peräsintä
E.4.1 RULES
(a) The rudder blade shall comply with the class rules in force at the time of certification.
(a) The rudder blade shall comply with the class rules in force at the time of certification.
E.4.2 MATERIALS
(a) The rudder blade shall be of GRP with core of polyurethane foam.
(c) The tiller may be of wood, GRP, aluminum or stainless steel or a combination of these materials.
(d) Thepintlesshallofstainlesssteel
(a) The rudder blade shall be of GRP with core of polyurethane foam.
(c) The tiller may be of wood, GRP, aluminum or stainless steel or a combination of these materials.
(d) Thepintlesshallofstainlesssteel
E.4.3 CONSTRUCTION
(a) The rudder blade shall be manufactured in a mould approved by the NCA or according to appendix H.2.
(a) The rudder blade shall be manufactured in a mould approved by the NCA or according to appendix H.2.
(b) The laminate layup shall be according to the buildings pecification
(c) A rudder which does not comply with the class rules may be altered to comply with appendix H.2.
(c) A rudder which does not comply with the class rules may be altered to comply with appendix H.2.
E.4.4 FITTINGS
(a) MANDATORY
(1) Two pintles (b) OPTIONAL
(1) One tiller extension of optional type E.4.5 DIMENSIONS
(a) The rudder shall be fitted to the hull and have dimensions as described in appendix H.2.
(a) MANDATORY
(1) Two pintles (b) OPTIONAL
(1) One tiller extension of optional type E.4.5 DIMENSIONS
(a) The rudder shall be fitted to the hull and have dimensions as described in appendix H.2.
E.4.6 WEIGHTS
(a) Rudder weight including pintles but without tiller and tiller extension minimum maximum 18 kg -
(b) Therudderweightmaybecorrectedusingcorrectorweights.Theyshallbe placed above the upper pintle. The design of the weight(s) is optional but they shall be securely fastened to the rudder by screws and/or glue or by being laminated into the rudder.
(b) Therudderweightmaybecorrectedusingcorrectorweights.Theyshallbe placed above the upper pintle. The design of the weight(s) is optional but they shall be securely fastened to the rudder by screws and/or glue or by being laminated into the rudder.
H.2 RUDDER DRAWING AND MEASUREMENT INSTRUCTION
Drawing H.2.1 Rudder plan
H.2.1 TEMPLATES
(a) Angle template according to drawing H.2.2
(b) Point template according to drawing H.2.3
Drawing H.2.2 Angle template
(a) Angle template according to drawing H.2.2
(b) Point template according to drawing H.2.3
Drawing H.2.2 Angle template
Drawing H.2.3 Point template
H.2.2 USE OF THE ANGLE TEMPLATE
The angle template is used as follows:
(a) Hold the longer leg against the rudder leading edge.
(b) Slide the template upwards until the shorter leg touches the rudder bottom.
H.2.3 DEFINITIONS
(a) The points C, D, D1 and L are determined by the angle template when it is placed according to H.2.2
(b) The point K is determined by the intersection between the short leg of the angle template and a 1000 mm straightedge resting against the rudder trailing edge and the short leg of the angle template when the template is placed according to H.2.2
(c) The point C1 is positioned above point K 40 mm along the rudder trailing edge.
(d) The point I is positioned above point K 1080 mm along the rudder trailing edge.
(e) The point J is positioned above point L 1100 mm along the rudder leading edge.
(f) ThepointRisdefinedbythepointonthepointtemplatewhenthetemplate is positioned on the bottom of the hull shell with the point touching the rudder.
(a) The points C, D, D1 and L are determined by the angle template when it is placed according to H.2.2
(b) The point K is determined by the intersection between the short leg of the angle template and a 1000 mm straightedge resting against the rudder trailing edge and the short leg of the angle template when the template is placed according to H.2.2
(c) The point C1 is positioned above point K 40 mm along the rudder trailing edge.
(d) The point I is positioned above point K 1080 mm along the rudder trailing edge.
(e) The point J is positioned above point L 1100 mm along the rudder leading edge.
(f) ThepointRisdefinedbythepointonthepointtemplatewhenthetemplate is positioned on the bottom of the hull shell with the point touching the rudder.
H.2.4 DIMENSIONS
Point R-Point L: min.1140 mm max.1150mm
Point K-Point L: min. 240m max. 250mm
Point I-Point J: min. 380mm max. 390mm
Maximum rudder width along I-J min.55mm max.60
Maximum rudder width 20 mm above K-L min.42mm max.46mm
Point R-Point L: min.1140 mm max.1150mm
Point K-Point L: min. 240m max. 250mm
Point I-Point J: min. 380mm max. 390mm
Maximum rudder width along I-J min.55mm max.60
Maximum rudder width 20 mm above K-L min.42mm max.46mm
H.2.5 RUDDER SURFACE
The rudder surface shall be convex except for surface irregularities smaller than 2 mm caused by manufacturing defects and/or unskilled finish work
The rudder surface shall be convex except for surface irregularities smaller than 2 mm caused by manufacturing defects and/or unskilled finish work
H.2.6 RUDDER EDGES
The rudder leading and trailing edges shall be straight with a tolerance of ±2 mm between:
The rudder leading and trailing edges shall be straight with a tolerance of ±2 mm between:
(a) D1-J
(b) C1-I
The deviation between the lower leg of the angle template and bottom of the rudder between C and D shall be less than 4 mm. Between C-C1 and D-D1 the shape is free.
(b) C1-I
The deviation between the lower leg of the angle template and bottom of the rudder between C and D shall be less than 4 mm. Between C-C1 and D-D1 the shape is free.
Profiilisuositus: NACA0012
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