Talk:High–low system

— Preceding unsigned comment added by 123.24.91.134 (talk) 12:09, 7 July 2011 (UTC)

Untitled

 * Dear Member, Thanks for posting the drawing. The above technically is a high-low system.  Although it does not reduce the pressure as much as the 20th century systems.  The reason for some kind of high-low system with those big mortars is because they fire a thing casting shell filled with gunpowder.  That is why most mortar system fired a much reduced charge.  But you can only reduce it so much.  Black powder unlike modern propellents used in small arms and artillery, goes of immediately with a massive expansion over a short period.  That is why most heavy black powder artillery had a heavy re-enforced breach and not the barrel.   If that mortar operated like modern high-low systems with just a smaller opening to the main chamber the re-enforcement of the back end would have had to be massive. JackJackehammond (talk) 04:40, 9 July 2011 (UTC)