to be honest, unless your using a support vehicle limited to planetary operations (like the aforementioned airships), don't even bother. if you are carting around conventional for your force between worlds, store them as cargo, put actual aerospace fighters into any fighter bays, and deploy the conventional fighters after you land. conventionals can't do enough in air superiority to make it worth launching them the moment you hit atmo, better to stick aerospace fighters (even light cheap ones) in those bays so you have CAP in space if you need it, and get the performance boost aerospace fighters have to help secure the air.
i'd only stick conventional fighters into the bays on a dropship if you don't have ASF's and don't have the cargo space to spare.