"Big John" wrote:

AW&ST reported in issue I received today that a Long-EZ flew down
runway at Mojave with a PDE.

Engine developed more than 200 lbs of thrust and fired at around 80
Hz. PDE replaced a Lyc 0-235.

PULSED DETONATION POWERED AIRCRAFT MOVES CLOSER TO FIRST FLIGHT:

The Pulsed Detonation Flight Program recently commenced ground testing at

Scaled Composites, Inc. in Mojave, California. On the first day of hot-fire
testing, thrust and

acoustics were successfully checked out. Acoustic levels in front of the
aircraft, including the

cockpit area, were significantly less than those measured in the laboratory at
Wright-Patterson

AFB, Ohio. Acoustic levels behind the aircraft were as previously predicted.
Ground testing was

audible at distances exceeding five miles from the airport runway