diff --git a/core/src/net/sf/openrocket/util/Transformation.java b/core/src/net/sf/openrocket/util/Transformation.java
index 2c5469740..8656a4f25 100644
--- a/core/src/net/sf/openrocket/util/Transformation.java
+++ b/core/src/net/sf/openrocket/util/Transformation.java
@@ -257,23 +257,4 @@ public class Transformation implements java.io.Serializable {
 		return this.translate.equals(o.translate);
 	}
 	
-	public static void main(String[] arg) {
-		Transformation t;
-		
-		t = new Transformation();
-		t.print("Empty");
-		t = new Transformation(1,2,3);
-		t.print("1,2,3");
-		t = new Transformation(new Coordinate(2,3,4));
-		t.print("coord 2,3 4");
-		
-		t = Transformation.rotate_y(0.01);
-		t.print("rotate_y 0.01");
-		
-		t = new Transformation(-1,0,0);
-		t = t.applyTransformation(Transformation.rotate_y(0.01));
-		t = t.applyTransformation(new Transformation(1,0,0));
-		t.print("shift-rotate-shift");
-	}
-	
 }
diff --git a/core/test/net/sf/openrocket/util/TransformationTest.java b/core/test/net/sf/openrocket/util/TransformationTest.java
new file mode 100644
index 000000000..25b8941bb
--- /dev/null
+++ b/core/test/net/sf/openrocket/util/TransformationTest.java
@@ -0,0 +1,82 @@
+package net.sf.openrocket.util;
+
+import org.junit.Test;
+import static org.junit.Assert.assertEquals;
+
+
+public class TransformationTest {
+	@Test
+	public void oldMainTest() {
+		Transformation t;
+
+		t = new Transformation();
+		{
+			Coordinate a = t.transform( new Coordinate(1,0,0) );
+			assertEquals( new Coordinate(1,0,0), a );
+			a = t.transform( new Coordinate(0,1,0) );
+			assertEquals( new Coordinate(0,1,0), a );
+			a = t.transform( new Coordinate(0,0,1) );
+			assertEquals( new Coordinate(0,0,1), a );
+		}
+
+		t = new Transformation(1,2,3);
+		{
+			Coordinate a = t.transform( new Coordinate(1,0,0) );
+			assertEquals( new Coordinate(2,2,3), a );
+			a = t.transform( new Coordinate(0,1,0) );
+			assertEquals( new Coordinate(1,3,3), a );
+			a = t.transform( new Coordinate(0,0,1) );
+			assertEquals( new Coordinate(1,2,4), a );
+		}
+		
+		
+		t = new Transformation(new Coordinate(2,3,4));
+		{
+			Coordinate a = t.transform( new Coordinate(1,0,0) );
+			assertEquals( new Coordinate(3,3,4), a );
+			a = t.transform( new Coordinate(0,1,0) );
+			assertEquals( new Coordinate(2,4,4), a );
+			a = t.transform( new Coordinate(0,0,1) );
+			assertEquals( new Coordinate(2,3,5), a );
+		}
+
+		// FIXME - is this correct?  shouldn't a rotation preserve coordinate length?
+		t = Transformation.rotate_y(0.01);
+		{
+			Coordinate a = t.transform( new Coordinate(1,0,0) );
+			// we need to test individual coordinates due to error.
+			assertEquals( 1, a.x, .001);
+			assertEquals( 0, a.y, .001);
+			assertEquals( -.01, a.z, .001);
+			a = t.transform( new Coordinate(0,1,0) );
+			assertEquals( new Coordinate(0,1,0), a );
+			a = t.transform( new Coordinate(0,0,1) );
+			// we need to test individual coordinates due to error.
+			assertEquals( .01, a.x, .001);
+			assertEquals( 0, a.y, .001);
+			assertEquals( 1, a.z, .001);
+		}
+
+		t = new Transformation(-1,0,0);
+		t = t.applyTransformation(Transformation.rotate_y(0.01));
+		t = t.applyTransformation(new Transformation(1,0,0));
+		{
+			Coordinate a = t.transform( new Coordinate(1,0,0) );
+			// we need to test individual coordinates due to error.
+			assertEquals( 1, a.x, .001);
+			assertEquals( 0, a.y, .001);
+			assertEquals( -.02, a.z, .001);
+			a = t.transform( new Coordinate(0,1,0) );
+			assertEquals( 0, a.x, .001);
+			assertEquals( 1, a.y, .001);
+			assertEquals( -.01, a.z, .001);
+			a = t.transform( new Coordinate(0,0,1) );
+			// we need to test individual coordinates due to error.
+			assertEquals( .01, a.x, .001);
+			assertEquals( 0, a.y, .001);
+			assertEquals( .99, a.z, .001);
+		}
+	}
+
+
+}