The torp works in a test drive as long as you stay within the parameters shown on the stat card. Its useless in level bombing because you don’t get a bombsight. The plus side that I’ve shown in a test drive is the ability to dive bomb with a torp.
But in game, at least on the Denmark map, they seem to travel the opposite direction.
It took a few tries to capture what it does in game. (Im on console so dont get access to the replay system in the same way PC players do)