http://www.ApogeeRockets.com - In this video I'll show you a Disposable Motor System (DMS) rocket motor from Aerotech and how to use it by drilling out the delay time using the Universal Delay Drilling Tool and then adding the ejection charge.
30-day RockSim Trail: https://www.apogeerockets.com/RockSim/Rocksim_Trial
Videos Showing How To Select Rocket Motors:
Part 1: https://www.youtube.com/watch?v=dTasgUwLau8
Part 2: https://www.youtube.com/watch?v=2bxPQNdcd3Q