diff --git a/core/src/net/sf/openrocket/aerodynamics/BarrowmanCalculator.java b/core/src/net/sf/openrocket/aerodynamics/BarrowmanCalculator.java
index ae9d9e404..b12e8983e 100644
--- a/core/src/net/sf/openrocket/aerodynamics/BarrowmanCalculator.java
+++ b/core/src/net/sf/openrocket/aerodynamics/BarrowmanCalculator.java
@@ -585,7 +585,6 @@ public class BarrowmanCalculator extends AbstractAerodynamicCalculator {
 		final InstanceMap imap = configuration.getActiveInstances();
 	    for(Map.Entry<RocketComponent, ArrayList<InstanceContext>> entry: imap.entrySet() ) {
 			final RocketComponent c = entry.getKey();
-			log.debug("component " + c);
 
 			if (!c.isAerodynamic())
 				continue;
diff --git a/core/src/net/sf/openrocket/aerodynamics/barrowman/TubeCalc.java b/core/src/net/sf/openrocket/aerodynamics/barrowman/TubeCalc.java
index 9b963407e..60117d808 100644
--- a/core/src/net/sf/openrocket/aerodynamics/barrowman/TubeCalc.java
+++ b/core/src/net/sf/openrocket/aerodynamics/barrowman/TubeCalc.java
@@ -35,7 +35,7 @@ public abstract class TubeCalc extends RocketComponentCalc {
 		final double Q = conditions.getVelocity() * refArea;
 
 		// pressure drop
-		final double deltap = 1.6 * 1000 * Math.pow(Q, 1.85) * Math.pow(Q, 1.85) * length /
+		final double deltap = 1.6 * Math.pow(Q, 1.85) * length /
 			(Math.pow(diameter, 5) * conditions.getAtmosphericConditions().getPressure());
 
 		// convert to CD and return