diff --git a/pr/schneller_kreuzer/ringwulst.pov b/pr/schneller_kreuzer/ringwulst.pov
index d5a4a28..a6ff332 100644
--- a/pr/schneller_kreuzer/ringwulst.pov
+++ b/pr/schneller_kreuzer/ringwulst.pov
@@ -1,60 +1,101 @@
 #local Eps = 1E-6;
+#include "triebwerk.pov"
 
 #declare ringwulst = 
-    difference {
+    union {
 	difference {
-	    union {
+	    difference {
+		union {
+		    cylinder {
+			<0, -10, 0>
+			<0,  10, 0>
+			50
+		    }
+		    torus {
+			50, 15
+			scale <1, 10/15, 1>
+		    }
+		}
 		cylinder {
-		    <0, -10, 0>
-		    <0,  10, 0>
-		    50
-		}
-		torus {
-		    50, 15
-		    scale <1, 10/15, 1>
+		    <0, -10 - Eps, 0>
+		    <0,  10 + Eps, 0>
+		    15
 		}
 	    }
-	    cylinder {
-		<0, -10 - Eps, 0>
-		<0,  10 + Eps, 0>
-		15
-	    }
-	}
-	difference {
-	    union {
+	    difference {
+		union {
+		    cylinder {
+			<0, -8, 0>
+			<0,  8, 0>
+			50
+		    }
+		    torus {
+			50, 13
+			scale <1, 8/13, 1>
+		    }
+		}
 		cylinder {
-		    <0, -8, 0>
-		    <0,  8, 0>
-		    50
-		}
-		torus {
-		    50, 13
-		    scale <1, 8/13, 1>
+		    <0, -8 - Eps, 0>
+		    <0,  8 + Eps, 0>
+		    17
 		}
 	    }
-	    cylinder {
-		<0, -8 - Eps, 0>
-		<0,  8 + Eps, 0>
-		17
+	    box {
+		<-100, -100, -100>
+		<   0,  100,    0>
 	    }
-	}
-	box {
-	    <-100, -100, -100>
-	    <   0,  100,    0>
-	}
+	    #local i = 0;
+	    #while (i < 18) 
+		#local aa = i * 360 / 18;
+		#local ss = 1;
+		#ifdef (SCHNITT_1)
+		    #local pp = vrotate(<0, 0, 1>, <0, aa, 0>);
+		    #if (pp.x < 0 & pp.z < 0) 
+			#local ss = 0;
+		    #end
+		#end
+		#if (ss) 
+		    object {
+			triebwerk_neg
+			rotate <0, aa, 0>
+		    }
+		#end
 
-	#if (0)
-	texture {
-	    crackle 
-	    texture_map {
-		[ 0.0 T_arkonstahl ]
-		[ 0.2 T_arkonstahl ]
-		[ 0.2 T_luft ]
-		[ 1.0 T_luft ]
+		#local i = i + 1;
+	    #end
+
+	    #if (0)
+	    texture {
+		crackle 
+		texture_map {
+		    [ 0.0 T_arkonstahl ]
+		    [ 0.2 T_arkonstahl ]
+		    [ 0.2 T_luft ]
+		    [ 1.0 T_luft ]
+		}
 	    }
+	    #else 
+	    texture { T_arkonstahl }
+	    #end
 	}
-	#else 
-	texture { T_arkonstahl }
+	#local i = 0;
+	#while (i < 18) 
+	    #local aa = i * 360 / 18;
+	    #local ss = 1;
+	    #ifdef (SCHNITT_1)
+		#local pp = vrotate(<0, 0, 1>, <0, aa, 0>);
+		#if (pp.x < 0 & pp.z < 0) 
+		    #local ss = 0;
+		#end
+	    #end
+	    #if (ss) 
+		object {
+		    triebwerk
+		    rotate <0, aa, 0>
+		}
+	    #end
+
+	    #local i = i + 1;
 	#end
     }
     
diff --git a/pr/schneller_kreuzer/triebwerk.pov b/pr/schneller_kreuzer/triebwerk.pov
new file mode 100644
index 0000000..ea055b1
--- /dev/null
+++ b/pr/schneller_kreuzer/triebwerk.pov
@@ -0,0 +1,264 @@
+#include "T_arkonstahl.pov"
+#include "glass.inc"
+#include "rounded_box.pov"
+
+#local Eps = 1E-6;
+
+#local l_a_r =
+    union {
+	cylinder {
+	    <0, 5.0, 0>, <2.8, 5.0, 0>, 0.1
+	}
+	sphere {
+	    <2.8, 5.0, 0>, 0.1
+	}
+	cylinder {
+	    <2.8, 5.0, 0>, <2.8, -5.0, 0>, 0.1
+	}
+	sphere {
+	    <2.8, -5.0, 0>, 0.1
+	}
+    }
+
+#local l_1_r =
+    union {
+	object {
+	    l_a_r
+	    translate <0, 0, 20>
+	}
+	cylinder {
+	    <2.8, -5.0, 20.0>, <2.8, -5.0, 21.0>, 0.1
+	}
+	sphere {
+	    <2.8, -5.0, 21.0>, 0.1
+	}
+	cylinder {
+	    <2.8, -5.0, 21.0>, <2.5, -5.0, 21.0>, 0.1
+	}
+	pigment {
+	    rgb <1, 0.5, 0>
+	}
+    }
+
+#local l_2_r =
+    union {
+	object {
+	    l_a_r
+	    translate <0, 0, 27.5>
+	}
+	cylinder {
+	    <2.8, -5.0, 27.5>, <2.5, -5.0, 27.5>, 0.1
+	}
+	pigment {
+	    rgb <1, 0.5, 0>
+	}
+    }
+
+#local l_3_r =
+    union {
+	object {
+	    l_a_r
+	    translate <0, 0, 35>
+	}
+	cylinder {
+	    <2.8, -5.0, 35.0>, <2.8, -5.0, 31.0>, 0.1
+	}
+	sphere {
+	    <2.8, -5.0, 31.0>, 0.1
+	}
+	cylinder {
+	    <2.8, -5.0, 31.0>, <2.5, -5.0, 31.0>, 0.1
+	}
+	pigment {
+	    rgb <1, 0.5, 0>
+	}
+    }
+
+#declare triebwerk = 
+    union {
+	union {
+	    sphere {
+		<0, 0, 0>, 1
+		scale 2.5
+	    }
+	    cone {
+		<0, 0, 0>, 0
+		<0, 3, 0>, 1.0
+	    }
+
+	    translate <0, 5.0, 20>
+	    pigment {
+		rgb <1, 0.5, 0>
+	    }
+	}
+	object {
+	    l_1_r
+	}
+	object {
+	    l_1_r
+	    scale <-1, 1, 1>
+	}
+	union {
+	    sphere {
+		<0, 0, 0>, 1
+		scale 2.5
+	    }
+	    cone {
+		<0, 0, 0>, 0
+		<0, 3, 0>, 1.0
+	    }
+	    translate <0, 5.0, 27.5>
+	    pigment {
+		rgb <1, 0.5, 0>
+	    }
+	}
+	object {
+	    l_2_r
+	    pigment {
+		rgb <1, 0, 0>
+	    }
+	}
+	object {
+	    l_2_r
+	    scale <-1, 1, 1>
+	}
+	union {
+	    sphere {
+		<0, 0, 0>, 1
+		scale 2.5
+	    }
+	    cone {
+		<0, 0, 0>, 0
+		<0, 3, 0>, 1.0
+	    }
+	    translate <0, 5.0, 35>
+	    pigment {
+		rgb <1, 0.5, 0>
+	    }
+	}
+	object {
+	    l_3_r
+	}
+	object {
+	    l_3_r
+	    scale <-1, 1, 1>
+	}
+	union {
+	    cylinder {
+		<1, 0, 22>, <1, -2.5, 22>, 1
+	    }
+	    cylinder {
+		<-1, 0, 22>, <-1, -2.5, 22>, 1
+	    }
+	    cylinder {
+		<0, 0, 21> <0, 0, 32> 1.0
+	    }
+	    #local z0 = 22;
+	    #while (z0 <= 32)
+		sphere {
+		    <0, 0, 0>, 1
+		    scale 0.2
+		    translate <0, 1.1, z0>
+		    rotate <0, 0, z0 * 180>
+		    pigment {
+			rgb <0, 0, 0.2>
+		    }
+		}
+		sphere {
+		    <0, 0, 0>, 1
+		    scale 0.2
+		    translate <0, -1.1, z0>
+		    rotate <0, 0, z0 * 180>
+		    pigment {
+			rgb <0, 0, 0.2>
+		    }
+		}
+		#local z0 = z0 + 0.05;
+	    #end
+	    torus {
+		1,1
+		scale 1.0
+		rotate <90, 0, 0>
+		translate <0, 0, 22.0>
+	    }
+	    cone {
+		<0, 0, 32> 1.0
+		<0, 0, 40> 3.0
+	    }
+	    cone {
+		<0, 0, 40> 3.0
+		<0, 0, 49> 3.0
+	    }
+	    cone {
+		<0, 0, 49> 3.0
+		<0, 0, 50> 2.0
+	    }
+	    cone {
+		<0, 0, 50> 2.0
+		<0, 0, 56> 2.0
+	    }
+	    sphere {
+		<0, 0, 56>, 3.0
+	    }
+	    intersection {
+		union {
+		    difference {
+			cone {
+			    <0, 0, 56> 0.5
+			    <0, 10, 57.5> 3.0
+			}
+			cone {
+			    <0, 0, 56> 0.1
+			    <0, 10 + Eps, 57.5 + Eps> 2.5
+			}
+		    }
+		    difference {
+			cone {
+			    <0, 0, 56> 0.5
+			    <0, -10, 57.5> 3.0
+			}
+			cone {
+			    <0, 0, 56> 0.1
+			    <0, -10 + Eps, 57.5 + Eps> 2.5
+			}
+		    }
+		}
+		torus {
+		    50, 15
+		    scale <1, 10/15, 1>
+		}
+	    }
+	    prism {
+		-1, 1,
+		5,
+		<3.5, -8> <-3.5, -8>, <-3, -1>, <3, -1>, <3.5, -8>
+		rotate <-90, 0, 0>
+		translate <0, 0, 41>
+	    }
+	    prism {
+		-1, 1,
+		5,
+		<3.5, -8> <-3.5, -8>, <-2.5, -1>, <2.5, -1>, <3.5, -8>
+		rotate <-90, 0, 0>
+		translate <0, 0, 53>
+	    }
+	    texture { T_arkonstahl }
+	}
+	object {
+	    rounded_box(<-2.5, -8, 20>, <2.5, -2.5, 32>, 0.5)
+	    texture { T_Ruby_Glass }
+	    interior { I_Glass }
+	}
+    }
+
+#declare triebwerk_neg =
+    union {
+	cone {
+	    <0, 0, 56> 0.5
+	    <0, 10, 57.5> 3.0
+	}
+	cone {
+	    <0, 0, 56> 0.5
+	    <0, -10, 57.5> 3.0
+	}
+    }