1 files changed, 9 insertions, 0 deletions
diff --git a/src/train.h b/src/train.h
index a43b0747c..84bb88e30 100644
--- a/src/train.h
+++ b/src/train.h
@@ -433,6 +433,15 @@ protected: // These functions should not be called outside acceleration code.
 	}
 
 	/**
+	 * Gets the area used for calculating air drag.
+	 * @return Area of the engine.
+	 */
+	FORCEINLINE byte GetAirDragArea() const
+	{
+		return 120;
+	}
+
+	/**
 	 * Checks the current acceleration status of this vehicle.
 	 * @return Acceleration status.
 	 */