PA-28R Cherokee Arrow All Series
Flight Crew Instrument
Flight Crew Last 90 Days 7; Flight Crew Total 837; Flight Crew Type 27
Situational Awareness
Conflict NMAC
General None Reported / Taken
Human Factors
Day was clear and wind was calm.  I was not sure which runway was active at 7B2 which is 14/32.  I did a radio check and listened to UNICOM 122.7 for other people approaching and heard another airplane call his intention for runway 14.  I was told previously that 14 was the runway preferred when the wind was calm at 7B2 by my flight instructor during complex operator training. I did my run-up and called my departure on runway 14.  There was another airplane on downwind for 14 and I also called that I had the traffic in sight.  I looked down and around to check for traffic and saw nobody else; so I made my departure.  As I took off and was climbing; I saw another airplane below near the ground to my right going the opposite direction.  I can only assume that he was landing on runway 32 and that I didn't see him.  It was a dark colored green; and the approach of Runway 32 faces a large green mountain so it might have been possible that I missed him because his color blended in with that mountain.  I have to maintain that I did not hear any radio call from this plane; and that both one other plane and myself had made very clear calls for using Runway 14.
A PA28R pilot reported an NMAC after departing Runway 14 at 7B2; a non-Towered airport.