Departure and Conditions
A pilot and a passenger were departing a remote lake in a float-equipped airplane as the return portion of a cross-country personal flight at the conclusion of a hunting trip. The water conditions were described as smooth and glassy.
Takeoff Attempt
During the takeoff, the pilot initially used 10 degrees of flaps. When the airplane would not break free from the water surface, the pilot lowered the flaps to 20 degrees. The airplane did not accelerate properly, prompting the pilot to abort the takeoff.
Accident Sequence
The airplane's forward momentum carried it into the lake shoreline. The front portion of the floats contacted the terrain, and the airplane nosed over.
Aircraft Owner's Manual Recommendations
The aircraft owner's manual recommends using 20 degrees of flaps throughout the takeoff. Additionally, under heavy loads and glassy water conditions, an abrupt application of back control pressure may be necessary to break free of the water surface.