Narrative:

We were flying along in contact with louisville approach and had just been vectored 10 degrees left for something involving 'proving grounds'. Our heading was 339. Within a minute after being vectored both pilot and right seat non-pilot occupant observed what appeared to be an unmanned aircraft and tracked it from our 11 o'clock to our 4 o'clock for approximately 45 seconds. We were level 10;000 MSL at the time and altitude of unidentified aircraft estimated 9;000 and under power. It appeared to be an airplane in type; too small for carrying a person; mostly black with red and green markings. We were VFR on top and there was a solid layer between us/observed aircraft and the ground. I reported immediately to louisville approach and the baffled controller asked for clarification on what I was reporting and I repeated. Controller indicated he showed no indication of the reported aircraft on radar. An hour after landing I called louisville approach on the phone to debrief the situation again and was blown off. The lady I spoke with indicated it was probably just a 'glider because they operate in that area'. I challenged her [saying] I found it very unlikely a glider was flying at 9k; under power in IMC conditions; still she persisted that must have been the explanation. The aircraft was absolutely not a traditional glider airframe.

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Original NASA ASRS Text

Title: SR22 pilot reports sighting a possible UAV 1;000 FT below and opposite direction in SDF airspace. ATC is advised but they claim no knowledge of the aircraft.

Narrative: We were flying along in contact with Louisville Approach and had just been vectored 10 degrees left for something involving 'proving grounds'. Our heading was 339. Within a minute after being vectored both pilot and right seat non-pilot occupant observed what appeared to be an unmanned aircraft and tracked it from our 11 o'clock to our 4 o'clock for approximately 45 seconds. We were level 10;000 MSL at the time and altitude of unidentified aircraft estimated 9;000 and under power. It appeared to be an airplane in type; too small for carrying a person; mostly black with red and green markings. We were VFR on top and there was a solid layer between us/observed aircraft and the ground. I reported immediately to Louisville Approach and the baffled Controller asked for clarification on what I was reporting and I repeated. Controller indicated he showed no indication of the reported aircraft on radar. An hour after landing I called Louisville Approach on the phone to debrief the situation again and was blown off. The lady I spoke with indicated it was probably just a 'glider because they operate in that area'. I challenged her [saying] I found it very unlikely a glider was flying at 9k; under power in IMC conditions; still she persisted that must have been the explanation. The aircraft was absolutely not a traditional glider airframe.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.