for me with two failed launch attempts due to a bad batch of Aerotech G80-7T rocket motors. One exploded in the rocket, failing to properly ignite the propellant and ejection charge, though there was no damage to the rocket body due to its robust fiberglass and epoxy construction.
Cherokee and me, prior to launch at the sod farm on a hot and hazy day.
Three…two…one…chuff! The Wildman Cherokee on rail C6 at moment of ignition failure which pressurized the rocket body and popped off the nose cone.
Cracked engine casing showing one of the two unignited propellant grains. The yellow forward closure contains unignited black powder of the ejection charge. Both failed motors are stamped with the same date/batch number.