RedactedNarrative: DECEASED HAD BEEN WORKING ON V1 NEW TRANSOM. DECEASED TO TAKE V1 FOR A TEST DRIVE AND WAS LIKELY INTOXICATED (NOTED BY FAMILY MEMBERS).  DECEASED WAS DOING  TIGHT DONUTS IN THE LAKE WHEN HIS TIGHT TURN RADIUS CAUSED THE BOAT TO CAPSIZE.  DECEASED BEGAN SWIMMING TO SHORE, BUT DROPPED BELOW SURFACE AND NEVER RESURFACED. DECEASED WAS NOT WEARING A PFD.