NYC84LA285

Shortly after takeoff pilot was advised of model aircraft in flight path, evasive action taken, however, presence of model not confirmed. Pilot reduced pwr below recommeded RPM causing aircraft to settle. Pilot then applied pwr to avoid collision with trees. When it appeared that the aircraft was going to crash the pilot reduced pwr and stalled the aircraft colliding with trees. A check with model airport revealed that no model aircraft were being flown at the time of the reported incident. A passenger on board the aircraft did not see the reported model aircraft. There was a high ridge at the FAR end of the runway used for takeoff only 300 ft above runway level. Pilot reduced power on takeoff afterraising landing gear to a power setting below that incorporated in the flight operating specifications.