Here , the implosion test by decreasing steam temperature inside the drum. The drum imploded when temperature reduced to dew point where the steam volume imploded 1863: 1 by ratio...Dew can also be done if the pressure inside the drum is increased to the point of steam turns into water dew... Check with the Water Enthalpy graph...In the internal combustion engine, pressure increase is with the compression stroke , after the intake stroke..these two strokes are the KEY to run with water electrolysis..