AF flight 20. Engine fire after launch forced jettisoning of propellants, completed as a glide flight.
AF flight 24. Pilot-check flight. Mach 1.1, during 4-cylinder run at 12505 m.
AF flight 26. Familiarization flight.
AF flight 29. Aborted because of inconsistent rocket operation. Reached mach 0.9.
AF flight 31. Pressure distribution survey. Mach 1.15.
AF flight 33. Buffet investigation, wing and tail loads. Mach 1.08.