You have autostart? Failing that, you have an egt start limit? Presumably the manufacturers are confident that the start will be aborted if it goes pear-shaped, then you'll scratch your head and get towed round into wind for attempt number two.........
I've never heard of a tailwind starting limit, but the P & W -3A engines on the early classic jumbos needed about 15 knot headwind, minimum!!!!
