Mortar training device with functional simulated propelling charges

A mortar training device similar to a service mortar cartridge for use in a standard mortar comprising, in combination;

• a reusable sabot projectile of nominal mortar bore diameter including a body having a small caliber bore, a hollow boom joined axially to said body, a fin section joined axially to said boom;
• a subprojectile accommodated within said small caliber bore of said sabot projectile body;
• a propelling gas means for propelling said subprojectile including a propellant charge, said propelling gas means contained in said sabot projectile;
• a charge initiating means including a percussion primer located aft of said propelling gas means;
• a subchamber comprised of free volume within said sabot projectile aft of said subprojectile wherein subchamber gases are received from said propellant charge to propel said subprojectile;
• a mortar chamber comprised of free volume within said mortar adjacent said sabot projectile;
• a propelling gas egress means including a plurality of gas control ports connecting said subchamber and said mortar chamber for reducing subchamber gas pressure;
• a plugging means including manually and individually removable plugs to block said gas control ports;
• a plug retaining means to prevent said plugs from being dislodged by said subchamber gas pressure;
• a sabot projectile expelling means including said propelling gas means, and a supplemental gas port means for discharging gases into said mortar chamber to eject said sabot projectile, said sabot projectile expelling means being essential when all said gas control ports are plugged.