Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 40; Flight Crew Total 460; Flight Crew Type 200
Conflict NMAC
General None Reported / Taken
Airspace Structure; Procedure
On extended right base leg to 25R at DVT; I observed am aircraft; similar to an Extra 300; traveling to the west (as though it were on the downwind to [Runway] 7L; against the current traffic direction); passing in front of me and slightly above. The aircraft was not in communication with the North Tower; which I was in contact with and had directed me to the extended base leg for [Runway] 25R. I was a little above traffic pattern altitude at about 2;700 feet as I was still descending; and the other aircraft was slightly above me. As it passed to my right and was off my right wing; it did a half snap roll and descended vertically; and at that time; it was apparent to me that it was a large radio controlled aircraft above the Sun Valley Fliers Field just NE of DVT. At that time; it was also evident that it was a lot closer to me than I had originally estimated; since it was not a full-sized aircraft. I reported this to ATC when it happened since there were other aircraft in the pattern at the time.
General aviation pilot reported a close encounter with a UAV while in the landing pattern at Phoenix Deer Valley Airport.