File:Voith schneider animation.gif

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Voith_schneider_animation.gif ‎(240 × 240 pixels, file size: 40 KB, MIME type: image/gif, looped, 10 frames, 1.0 s)

Summary

Title / Description


Voith Schneider Propeller animation, showing a top-down schematic view of a six-bladed Voith Schneider propeller. The approximate force on the water of each blade is shown by a blue arrow. The net force on the water is vertically upwards, indicating that the propeller itself is moving vertically downwards relative to the water.

The file was made with Pov-Ray version 3.6, with the source file: 

#include "colors.inc"          
#include "shapes.inc"
#macro airfoil()
union
{polygon
{
120,
<2.032241, -0.015403>, <2.033186, 0.002328>, <2.029376, 0.019655>, <2.020798, 0.036480>, 
<2.007448, 0.052705>, <1.989329, 0.068240>, <1.966455, 0.082997>, <1.938845, 0.096893>,
 <1.906529, 0.109851>, <1.869547, 0.121803>, <1.827947, 0.132683>, <1.781785, 0.142438>, 
<1.731128, 0.151018>, <1.676052, 0.158386>, <1.616643, 0.164512>, <1.552998, 0.169374>, 
<1.485222, 0.172964>, <1.413433, 0.175281>, <1.337759, 0.176334>, <1.258339, 0.176146>, 
<1.175324, 0.174747>, <1.088878, 0.172180>, <0.999175, 0.168497>, <0.906403, 0.163761>, 
<0.810764, 0.158046>, <0.712472, 0.151432>, <0.611756, 0.144010>, <0.508857, 0.135880>, 
<0.404031, 0.127146>, <0.297549, 0.117920>, <0.189695, 0.108317>, <0.080768, 0.098457>, 
<-0.028922, 0.088460>, <-0.139048, 0.078448>, <-0.249273, 0.068540>, <-0.359249, 0.058851>, 
<-0.468615, 0.049493>, <-0.577002, 0.040570>, <-0.684035, 0.032176>, <-0.789332, 0.024397>, 
<-0.892507, 0.017305>, <-0.993173, 0.010960>, <-1.090945, 0.005405>, <-1.185441, 0.000670>, 
<-1.276287, -0.003234>, <-1.363118, -0.006310>, <-1.445582, -0.008582>, <-1.523342, -0.010087>, 
<-1.596081, -0.010879>, <-1.663504, -0.011030>, <-1.725337, -0.010622>, <-1.781336, -0.009751>, 
<-1.831284, -0.008524>, <-1.874995, -0.007055>, <-1.912315, -0.005464>, <-1.943121, -0.003875>, 
<-1.967325, -0.002414>, <-1.984873, -0.001203>, <-1.995742, -0.000362>, <-1.999942, -0.000005>, 
<-1.997516, -0.000238>, <-1.988536, -0.001154>, <-1.973103, -0.002838>, <-1.951344, -0.005359>, 
<-1.923410, -0.008775>, <-1.889478, -0.013125>, <-1.849740, -0.018435>, <-1.804411, -0.024716>,
 <-1.753718, -0.031961>, <-1.697903, -0.040152>, <-1.637220, -0.049252>, <-1.571931, -0.059213>, 
<-1.502307, -0.069974>, <-1.428623, -0.081463>, <-1.351159, -0.093597>, <-1.270198, -0.106283>, 
<-1.186023, -0.119424>, <-1.098920, -0.132912>, <-1.009171, -0.146639>, <-0.917059, -0.160490>, 
<-0.822862, -0.174350>, <-0.726857, -0.188103>, <-0.629318, -0.201632>, <-0.530513, -0.214825>, 
<-0.430707, -0.227568>, <-0.330162, -0.239755>, <-0.229131, -0.251282>, <-0.127866, -0.262051>, 
<-0.026614, -0.271972>, <0.074387, -0.280959>, <0.174900, -0.288935>, <0.274696, -0.295831>, 
<0.373550, -0.301584>, <0.471242, -0.306142>, <0.567561, -0.309462>, <0.662297, -0.311507>,
 <0.755248, -0.312252>, <0.846218, -0.311679>, <0.935015, -0.309781>, <1.021455, -0.306557>, 
<1.105359, -0.302018>, <1.186554, -0.296182>, <1.264873, -0.289076>, <1.340155, -0.280734>, 
<1.412246, -0.271199>, <1.480999, -0.260522>, <1.546271, -0.248760>, <1.607929, -0.235976>, 
<1.665845, -0.222243>, <1.719898, -0.207635>, <1.769974, -0.192235>, <1.815967, -0.176129>, 
<1.857778, -0.159408>, <1.895313, -0.142167>, <1.928490, -0.124504>, <1.957230, -0.106520>, 
<1.981465, -0.088317>, <2.001133, -0.069999>, <2.016181, -0.051671>, <2.026563, -0.033437>
    pigment {rgb <0,0,0>}
	translate <-.5,.1,0>
}
disc
{
	<0,0,.001>,<0,0,1>,.1
	pigment{rgb <1,1,1>}
}
}

#end
#macro arrow()
polygon
{
	8,
	<-.5,-.5>,<.5,-.5>,<.5,2>,<1.2,2>,<0,3.2>,<-1.2,2>,<-.5,2>,<-.5,-.5>
	pigment {rgb <0,0,1> transmit 0.5}
}
#end 
#macro prop_element(ang,xofs,yofs,rad)
union
{
object
{
	airfoil()
	rotate z*90
	rotate z*-ang
	rotate z*180*atan2(sin(ang*pi/180.0)-yofs,cos(ang*pi/180.0)-xofs)/pi
	translate x*rad
}
object
{
	arrow()
	//scale <cos(ang*pi/180),cos(ang*pi/180),1>
	scale <.5+cos(ang*pi/180),.5+cos(ang*pi/180),1>
	scale .6
	translate z*.3
	rotate z*-ang
	translate x*rad
}
polygon
{
4,
<.4,0>,<-.4,0>,<-.1,rad>,<.1,rad>
 pigment {rgb <.6,.6,.6>}
translate z*-.1
	rotate z*90
}
	rotate z*ang
}
#end
#macro prop(xofs,yofs)
union
{
#declare ang=0;
#while (ang<360)
prop_element(ang+clock*6,xofs,yofs,5)
#declare ang=ang+60;
#end
disc
{
	<0,0,.002>,<0,0,1>,.6
	pigment{rgb <1,1,1>}
}
disc
{
	<0,0,.001>,<0,0,1>,1
	pigment{rgb <.6,.6,.6>}
}
}
#end

camera

{

   	orthographic
	location <0,0,10>
	right <15,0,0>
	up <0,15,0>
	look_at <0,0,0>


}  

light_source

{

	<0,0,40>

	White *2

	shadowless

}   
background {rgb <1,1,1>}

prop(.85,0)

Pov-Ray was executed with the command 

povray +KFF10 +KI0 +KF9 +A0.1 +W240 +H240 -GA vs.pov

The coordinates defining the shape of the blades are generated from a Joukowsky profile

Author(s)


Christopher Johnson (http://commons.wikimedia.org/wiki/User:Christopher_Johnson)
Copyright holder


Christopher Johnson
See below for license/re-use information.
Source


http://commons.wikimedia.org/wiki/Image:Voith_schneider_animation.gif
Date created


2008
Country of first publication


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Notes


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Under the following conditions: Attribution — You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). Share Alike — If you alter, transform, or build upon this work, you may distribute the resulting work only under the same, similar or a compatible licence.
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