Battle Blimp Rules

• Your blimp and its envelope must weigh no more than 100 grams
• No flame weapons/flames at all. No flame throwers, no rocket propulsion, no spark gaps etc (brushed motors are ok)
• Your "blimp" must not be cabable of flight with no envelope/badly ripped envelope. So no quad copters duct taped to a party balloon.
• No untethered projectiles (Even then, you must convince the judges that they will be safe. Its possible that an unteathered projectile will be acceptable but you MUST demonstrate it is very safe) If you are thinking of using projectiles you should check with one of the committee/ judges before hand to make sure it will be ok. Basically common sense rules apply here.
• No intentional jamming of opponents control scheme.

You also might want to look at Blimp Design Tips