the box is gonna cause major drag. but as for the door thingy, you could go to your local magic shop and get flash paper...flash paper is somthing that burns rather cold and ultra fast, and I mean super ultra fast. it wont even scorch the plane. or the kids, use an electric trigger of sime form to make a spark (glos plug to a servo activated switch for the power source? maybe) but in any case if you layer this so that it will hold the weight well when triggerd you wont have to worry about doors. just use a cardstock type paper for a flash plate so the candy wraping isnt harmed. it should fit AMA guidlines I think. no projectiles and I would hardly call a 1/30 of a second flash a fire. would you?