RedactedNarrative: THE ENGINE OF V1 DIED AND THE OPERATOR ATTEMPTED TO RESTART V1. THE ENGINE TURNED OVER A COUPLE TIMES, BUT NEVER STARTED. WHEN THE OPERATOR TRIED AGAIN V1 BURST INTO FLAMES.  V1 WAS FUELED ABOUT A HOUR AND A HALF BEFORE THE FIRE AND HE HAD ACTIVATED HIS BLOWER AFTER FUELING V1 AND LEFT IT ON FOR AN UNKNOWN TIME WHILE UNDERWAY. THE OFFICER WAS UNABLE TO DETERMINE THE CAUSE OF THE FIRE.