Cone shape experiment (10): Launch and experiencing failure

After 3D printing the launchpad, the rockets were ready to be launched

I felt optimistic before going out to launch the rockets, but my optimism was met by bitter failure as all my six rockets failed to launch. Having prepared this launch for more than a month, it was hard to accept the fact that I failed. The major problem that I identified in the building process was that the rocket did not have a nozzle, and thus the thrust force was not large enough to lift the rocket upwards.