arming_check = enabled
circle_radius = 700 cm
circle_rate = 30 deg/s
fence_alt_max = 70m
land_speed = 70 cm/s
pilot_velz_max = 300 cm/s
rtl_loit_time = 2500 ms
thr_min = 100
MOT_SPIN_ARM:
at 82: occationally trigger motor 2 to rotate.
at 84: running at gentle speed, giving 1188
THR_MIN :
at 105: give minimum pwm of 1190, when armed
0.105*817+1104=1190
give a limit using the formula (value / 1000) + 817 + 1104(or minimum throttle pwm)
Range of THR_MAX and THR_MIN tested: 817
