I can speak to the KDF fighter, and yes you can. Although unless im up against idran swarmers i prefer to use cannons on fighters. But dual turrets works just fine in fighters, it allows you to always fire and still keep changing your shield facings.
sau paulo quadcannons are escort only, so it wont fit on fighters or shuttles.
Threadjack #1 - and it really is a threadjack this time
The Light Cruiser is noted for not really being a cruiser, escort, or science vessel, but having aspects of all three such as having a better turn rate than cruisers, a shield modifier worthy of a cruiser, and being able to mount dual cannons. So, has anyone tried - mostly for s&g - to stick quad cannons on it? And if so, what were the results?