Re-posts 923 &927- (kansasw)
The exploding cylinder was on U-tube-it appeared to be a standard medical-type aluminium cylinder.
The explosive force of a large cylinder, as fitted to the aircraft,would, IMHO, be sufficient to rupture the hull-skin....the several hundred mile an hour slipstream would take care of this distinctly un-aerodynamic intrusion into it's smooth progress.
the argument about the hull being designed as a pressure-vessel, is a bit fatuous.....it was already loaded!...at cruise altitude, pressurised internally....suddenly hit by an enormous shockwave and simultaneous over-pressure,to an already once-repaired area.
buildings where pyrotechnics,ordinance,explosives etc. are prepared/assembled,,-are designed that the roof will readily blow off in order to minimise any blast-damage in event of an "incident"- a luxury not available to the designer of a pressurised aircraft.