One thing I noticed about the I130 was it had no visible flame until after the rocket left the rail. Very cool motor. Almost 5 second burn... the grain is looks like a giant G64 grain. They are still certified till June of next year. I have 1 load left, but I know where I could get more
I got a new 390 nozzle, so after my next I-ROC is built, and I insstall its electronics, I will fly it again. I am currious to see if the second motor I have does the same thing.