diff --git a/core/src/net/sf/openrocket/simulation/extension/impl/AirStart.java b/core/src/net/sf/openrocket/simulation/extension/example/AirStart.java
similarity index 94%
rename from core/src/net/sf/openrocket/simulation/extension/impl/AirStart.java
rename to core/src/net/sf/openrocket/simulation/extension/example/AirStart.java
index e591685b3..f4e77219a 100644
--- a/core/src/net/sf/openrocket/simulation/extension/impl/AirStart.java
+++ b/core/src/net/sf/openrocket/simulation/extension/example/AirStart.java
@@ -28,6 +28,11 @@ public class AirStart extends AbstractSimulationExtension {
 		name = L10N.replace(name, "{vel}", UnitGroup.UNITS_VELOCITY.toStringUnit(getLaunchVelocity()));
 		return name;
 	}
+
+	@Override
+	public String getDescription() {
+		return "Start simulation with a configurable altitude and velocity";
+	}
 	
 	public double getLaunchAltitude() {
 		return config.getDouble("launchAltitude", 0.0);
diff --git a/core/src/net/sf/openrocket/simulation/extension/impl/AirStartProvider.java b/core/src/net/sf/openrocket/simulation/extension/example/AirStartProvider.java
similarity index 100%
rename from core/src/net/sf/openrocket/simulation/extension/impl/AirStartProvider.java
rename to core/src/net/sf/openrocket/simulation/extension/example/AirStartProvider.java
diff --git a/swing/src/net/sf/openrocket/simulation/extension/impl/AirStartConfigurator.java b/swing/src/net/sf/openrocket/simulation/extension/example/AirStartConfigurator.java
similarity index 100%
rename from swing/src/net/sf/openrocket/simulation/extension/impl/AirStartConfigurator.java
rename to swing/src/net/sf/openrocket/simulation/extension/example/AirStartConfigurator.java