diff --git a/constants.h b/constants.h
index bdf5705..d82e622 100644
--- a/constants.h
+++ b/constants.h
@@ -1,10 +1,10 @@
 #ifndef CONSTANTS_H_
 	#define CONSTANTS_H_
 
-	#define FLIGHT_LENGTH 1.1*3600 // Seconds
+	#define FLIGHT_LENGTH 1.1 // Hours
 	#define FLIGHT_MAX_HEIGHT 12500 // Meters
 	#define ASCENT_VELOCITY 5.74 // m/s
-	#define DESCENT_VELOCITY FLIGHT_MAX_HEIGHT/(FLIGHT_LENGTH-FLIGHT_MAX_HEIGHT/ASCENT_VELOCITY) // m/s
+	#define DESCENT_VELOCITY FLIGHT_MAX_HEIGHT/(FLIGHT_LENGTH*3600-FLIGHT_MAX_HEIGHT/ASCENT_VELOCITY) // m/s
 
 	#define BAT_GSM_MAX 4.2
 	#define BAT_GSM_MIN 3.7