23-09-2020, 01:52 AM
Without the light one the drum rolls back and forth at speed. I seem to recall it does not come into operation until a few mph up. Decades ago with a ragng Wellington tail wind and a rolling drum and when our speed limit was 50 or 55 I got pulled up by a cop and asked if I was aware of speed (60mph!) Sadly I did not insist on a ticket.