i've found that the range is shorter (30yds?) when it's just running itself.
if i'm actively steering it or changing speed, the range is longer (50yds?).
based on this i assume the safety shut-down if set closer than the full reception range.
if i'm actively steering it or changing speed, the range is longer (50yds?).
based on this i assume the safety shut-down if set closer than the full reception range.