a parachute retarded torpedo that could be dropped from a long way up
This was my initial idea, but I'd like to postpone that maybe for a future update.
Thing is: These torpedoes would either have to run in circles (like the "Motobomba" italian ones) or they'd have to be homing torpedoes.
And again, therein lies the issue: Neither of these hit shit.
For the circling ones you can try yourself. And imagine they'd drop from 10km+ altitude... endless time for the target group to turn into another direction before the torps hit water.
For the homing torpedoes, the germans tried that in WW2 with the G7e (T4/T5) torps. Doesn't work. It's just too easy to counter it and the "Foxer" noise maker consequently rendered these high tech torps completely useless.
Flat torpedo runs make no sense at all.
Either you get close enough to hit something, in which case you can be 100% sure that they will hit you back. The ship
might get hit, you
will be dead. Even Kamikaze is a better deal.
Or you drop at really, really long distance. Now... such aerial torps in WW2 didn't exist, we'd be talking about distances like 20km or more, that'd be a
massively huge torp.
And even if they did, what would you expect to hit? The attacked ship simply
cannot miss your approach with such a large aircraft and they'd have endless time to change course.
TL;DR: Whatever you do, for a torpedo attack you need a nimble plane to stay a chance to survive because you have to get within 5km distance to have a chance to hit. It's all contrary to the whole Fugaku concept.
Mike