Hello I am currently studying for a BA iin mech eng. Now, i have been thinking recently, is it possible to produce a lightweight artillary shell, that can contain a solid state rocket fuel, and a compressed oxygen canister? If so, would it not be all that impossible to fire this 'shell' vertically into the air, and ignite at a certain altitude, after a designated time by a fuse ignited on launch? Now, you think i might have all gone mad. But hear me out. We have the efficiency in that we do not need to require a force to overcome the additional weight of the fuel onboard on board the rocket, because the fuel to gain its initial altitude will be spontaneuosly ignitined in the 'artillary piece'. There will be no electronic devices on board due to the shock, it would destroy everything, and they wouldnt be required anyway. So, what could this be used for? Well people all over the world would love to have their loved ones cremations in space for sure! Anyone believe this is at all possible??