Meal Powered End Burner
Mixture guide lines: Depending on your climate the factors can change for this mixture. A simple rule of thumb is to add small amounts of water to the meal until it no longer produces any fine dust clouds when mixed or shaken. If the mixture feels damp you’ve added to much water! Add one part dextrin or similar binder if you intend to leave these on the shelf for awhile (inside a vacuum sealed container without exposure to sunlight and a generally stable temperature is ideal). BE PATIENT AND REAP THE REWARDS!
Hydraulic Jack: Norco 20 ton bottle-jack. Gauge: Norco 12 & 20 ton. The gauge reads (PSI, 12ton & 20ton load). Using a nozzle-less (end-burning) approach compress 10g per load (1 TBS volumetrically) to 300 PSI [Remember this is what my gauge is reading, in reality the loading pressure is 2133 lbs. of force at the rammer head]. Be sure the PSI reading holds at 300 PSI (if the gauge holds at 300 PSI for about 10 seconds then proceed to the next loading). Keep the fuse in contact with the edge of the propellant and engine wall. Burn rate is about 1 second per load and has excellent thrust (I still need to measure the peak thrust of this simple composition). BONUS: Use of a 1/4″ tube wall also removes the need for a tube former (or other device to prevent the tube from bursting under loading pressure). Follow this procedure and you’ll keep em flying, not popping on the ground. Definitions: (End Burning) = The compressed powder core has three quarters of its total depth vented. This can be done simply with a drill bit or by the use of a tooled piece of material that is used as a form while compressing the engine.