I have just added a couple of planes and made a new planeset.
The FM files I added were for the Avenger and the Kate and both have the torpedo in their default loadout file.
I flew an aistarted single mission in a Corsair escorting Avengers to a convoy target.
I turned off enemy aircraft and AAA so that I could focus on the torpedo run with no distraction.
Once airborne and heading to the target I turned on wing leveller and hit F9 until I found the first Avenger.
I accelerated time and did not turn it off until the Avengers started their attack.
The torpedoes released perfectly, and my experiment was 100% successful.
Torpedoes starting to be released:
The aftermath:
I repeated the experiment flying a Zero escorting Kates:
Jel