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-rw-r--r--src/vehicle_type.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/vehicle_type.h b/src/vehicle_type.h
index 0921b39e3..f3e7d535f 100644
--- a/src/vehicle_type.h
+++ b/src/vehicle_type.h
@@ -17,6 +17,8 @@
/** The type all our vehicle IDs have. */
typedef uint32 VehicleID;
+static const int GROUND_ACCELERATION = 9800; ///< Acceleration due to gravity, 9.8 m/s^2
+
/** Available vehicle types. */
enum VehicleType {
VEH_BEGIN,