Hi Guys,
Just had an interesting e-mail sent to me. This person had a rocket motor F21-4w cato right at ignition. He was using an ML-12 that had been dipped with very little pyrogen so as to fit inside the core. He reported that it appeared as if the propellant had not even had a chance to burn. The bottom 1/3 of the casing had blown apart.
Has anyone else had this happen in conjuction with our products? What is an acceptable amount of clearence around the nozzle with the igniter installed so that overpressurization does not occur? All comments and suggestions are welcomed. Thanks for your input. Based on what I find out I may make a change to the recommendation for motor application of the ML-12.
Greg D. Rocketflite/Magnelite