This is a wings model of the rocket launcher that I'm planning on constructing for my hydrogen rocket. The brown pieces are wooden and leave a gap for the rocket fins which are larger here than they will be in reality. The rocket itself sits in the wooden rocket 'cradle' which will be tilted toward the sky on some sort of stand.



This one is my design for adding the gas to the rocket. The rocket will begin full of water, and then the gas will come in through the pipe with all the bends. The water inside of the rocket will leave through the other short pipe with the narrow end. The thing in the middle is the piezoelectric sparker which will ignite the rocket. All three things will go through a rubber stopper so that the water doesn't pour out the bottom of the rocket when it is resting on the launch pad.