Had to implement Arrays.copyOf for doubles because froyo doesn't have that either.

core/src/net/sf/openrocket/motor/ThrustCurveMotor.java

@@ -7,6 +7,7 @@ import java.util.Locale;
 import net.sf.openrocket.logging.LogHelper;
 import net.sf.openrocket.models.atmosphere.AtmosphericConditions;
 import net.sf.openrocket.startup.Application;
+import net.sf.openrocket.util.ArrayUtils;
 import net.sf.openrocket.util.BugException;
 import net.sf.openrocket.util.Coordinate;
 import net.sf.openrocket.util.Inertia;
@@ -54,11 +55,11 @@ public class ThrustCurveMotor implements Motor, Comparable<ThrustCurveMotor> {
 		this.designation = m.designation;
 		this.description = m.description;
 		this.type = m.type;
-		this.delays = Arrays.copyOf(m.delays, m.delays.length);
+		this.delays = ArrayUtils.copyOf(m.delays, m.delays.length);
 		this.diameter = m.diameter;
 		this.length = m.length;
-		this.time = Arrays.copyOf(m.time, m.time.length);
+		this.time = ArrayUtils.copyOf(m.time, m.time.length);
-		this.thrust = Arrays.copyOf(m.thrust, m.thrust.length);
+		this.thrust = ArrayUtils.copyOf(m.thrust, m.thrust.length);
 		this.cg = new Coordinate[ m.cg.length ];
 		for( int i = 0; i< cg.length; i++ ) {
 			this.cg[i] = m.cg[i].clone();

core/src/net/sf/openrocket/util/ArrayUtils.java

@@ -4,6 +4,10 @@ import java.lang.reflect.Array;
 
 public class ArrayUtils {
 
+	public static <T> T[] copyOf( T[] original, int length ) {
+		return copyOfRange(original,0,length);
+	}
+	
 	/**
 	 * Implementation of java.util.Arrays.copyOfRange
 	 * 
@@ -42,5 +46,38 @@ public class ArrayUtils {
 		return result;
 		
 	}
+
+	public static double[] copyOf( double[] original, int length ) {
+		return copyOfRange(original,0,length);
+	}
 	
+	public static double[] copyOfRange( double[] original, int start, int end ) {
+		
+		if ( original == null ) {
+			throw new NullPointerException();
+		}
+		
+		if ( start < 0 || start > original.length ) {
+			throw new ArrayIndexOutOfBoundsException();
+		}
+		
+		if ( start > end ) {
+			throw new IllegalArgumentException();
+		}
+		
+		double[] result = new double[(end-start)];
+		
+		int index = 0;
+		int stop = original.length < end ? original.length : end;
+		for ( int i = start; i < stop; i ++ ) {
+			if ( i < original.length ) {
+				result[index] = original[i];
+			}
+			index++;
+		}
+		
+		return result;
+		
+	}
+
 }