Engine Testing Notices
Some people have received packages of E9-4 motors from Estes. A note asks the recipients to use the motors and report on your satisfaction. The E9-4 motors are certified by the NAR. There is still more work to do on the certification by the S&T committee before we issue the final certification report. The motors are 24 by 95 mm and are in the 27 N-Sec impulse range. The burn time is about 3 sec and the delay is about 3.25 sec.