Wow, fascinating! From the title I was envisioning something akin to a solid rocket motor where the fuel gets consumed from the inside out and wondering what the point of that was, since at the end of the burn you'd still need to have enough fuselage left to avoid compromising structural integrity. (And at that point why not just build the fuselage like that from the start and use the extra mass for more liquid fuel?) But from the video it looks like this engine actually burns the hull back to front, meaning the fuselage actually gets shorter throughout the course of the flight until there's nothing left. That's really cool!
Yes I was absolutely not expecting a hot glue gun with a jet of flame coming out of the nozzle instead of hot glue, but that’s essentially what it looked like.
Is the idea that in a vertical version of this the motive force pushing the stack into the nozzle would be provided from the rocket's own acceleration?
Would that negate some of the controlability characteristics?
And would it need to be carefully tuned to the launch profile? (I assume deviations wouldn't be self-correcting eg. if acceleration is reduced there's less injection force presumably leading to less thrust).
