I have plans for a very very simple and effective bomb mount. Takes 1 servo and 5 minutes to rig. Will email to serious inquiries only
Step one, Drill hole (big enough for pushrod to fit through) in side of fuselage
Step Two, mount servo with foam tape on opposite side of hole.
step 3, run pushrod from servo arm through hole, leaving 1/4" of pushrod through hole, cut.
Step 4, fix rubber band to main landing gear strut, wrap band around bomb cradled under fuselage and fix to small bit of pushrod on side of fuselage.
fly, to drop bomb, click the 'flap' or whatever switch you chose and bombs away. works very well with 3 foam coffee cup bombs filled with flour.
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Bomb will look like so.