Optimal fire angle to target in scope at different ranges and speeds

[Paul Riley]

Can anyone provide me with a link to any information regarding the optimal firing angle to use to a target (bearing to target in scope),taking into account current range and speed of target.Due to my recent failure at only 500m using a slow electric I am eager to learn the optimal firing angles to use,particularly with electrics.This of course I could figure out myself in the academy,but would prefer a working listing in here using all possible variables.

So for example -

Target speed = 7kts
Range to target = 500m
Torpedo speed = 30kts
Fire angle = ?

This would be greatly appreciated