FW position failsafe defaults

ROMFS/px4fmu_common/init.d/rc.fw_defaults

@@ -7,6 +7,9 @@ then
 	#
 	# Default parameters for FW
 	#
+	param set COM_POS_FS_DELAY 5
+	param set COM_POS_FS_PROB 1
+	param set COM_POS_FS_GAIN 0
 
 	param set EKF2_ARSP_THR 8.0
 	param set EKF2_FUSE_BETA 0

src/modules/commander/commander_params.c

@@ -641,7 +641,7 @@ PARAM_DEFINE_INT32(COM_ARM_AUTH, 256010);
 /**
  * Loss of position failsafe activation delay.
  *
- * This sets number of second that the position checks need to be failed before the failsafe will activate.
+ * This sets number of seconds that the position checks need to be failed before the failsafe will activate.
  * The default value has been optimised for rotary wing applications. For fixed wing applications, a larger value between 5 and 10 should be used.
  *
  * @unit sec
@@ -653,7 +653,7 @@ PARAM_DEFINE_INT32(COM_POS_FS_DELAY, 1);
 /**
  * Loss of position probation delay at takeoff.
  *
- * The probation delay is number of seconds that the EKF innovation checks need to pass for the positon to be declared good after it has been declared bad.
+ * The probation delay is the number of seconds that the EKF innovation checks need to pass for the position to be declared good after it has been declared bad.
  * The probation delay will be reset to this parameter value when takeoff is detected.
  * After takeoff, if position checks are passing, the probation delay will reduce by one second for every lapsed second of valid position down to a minimum of 1 second.
  * If position checks are failing, the probation delay will increase by COM_POS_FS_GAIN seconds for every lapsed second up to a maximum of 100 seconds.