From today's AOPA epilot news.  They state that the engine lost power on takeoff.  Thankfully, the pilot was unhurt.


MISTRAL ENGINE PROTOTYPE CRASHES IN FLORIDA
A Piper Arrow powered by a prototype Mistral
( http://www.mistral-engines.com/ ) rotary aircraft engine crashed after the
engine lost power following takeoff from Palatka Municipal-Lt. Kay Larkin
Field in Florida. The owner, retired physician Stephen Roth of Deland, Fla.,
received minor injuries. The aircraft was used in 2004 for engine testing
( http://www.aopa.org/members/files/pilot/epilot/2004/040409epilot.html ) at
Embry Riddle Aeronautical University in Daytona Beach, Fla.