Engine type: End burner w/no cavity Case: 5″ x 1/2″ I.D. x 3/4″ O.D. Choke: 1/4″ thick w/7/64″ dia vent Burn Time: 5-6 seconds Thrust: approx 200g All ingredients except metal are ball milled until very fine. 6% metal of choice is added and composition is granulated using 20% water to dampen. Charcoal used was homemade from spruce.