*reads Jadehawk's post despite not really being in any 'proper' state to think*
*Ends up imagining fighter planes launching off a navy carrier's catapult*
click-BOOOM-LAUNCH~ and onward they go into the skies of blue...

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A Colossus catapult-launching 150 fully-armed spacecraft in one shot would make for real shock value, wouldn't it now... the enemy going "OMGWTF" and whatnot...
But a bit of what you said, very "basic"... they simply fly out of the hangar, and with the various SEXP methods of departure they just fly in...