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2 Fails from the same package, first one blew out the nozzle completely and just flamed out on the pad. The second one chuffed throughout the flight, and eroded the nozzle not completely, but way more than normal. The nozzle was eroded back away from the aft of the motor about 1/4" (started almost flush with the aft of the motor) Luckily it was a very lightweight mono copter, so the chuffing was enough to keep it flying safely.
