NMAC AT A NON TWR ARPT.

Narrative

JUST PRIOR TO LIFT-OFF ON MY TKOF; ANOTHER PLT XMITTED ON THE UNICOM FREQ THAT SHE WAS 'GOING AROUND' ON HER APCH TO LNDG. SHE SAID THAT SHE WAS ON FINAL APCH WHEN I TOOK THE RWY FOR DEP AND THAT SHE HAD MADE AN 'ON FINAL' RADIO XMISSION ON UNICOM FREQ. APPARENTLY; I DID NOT HEAR HER XMISSION AND I DID NOT SEE THIS ACFT; EVEN THOUGH I VISUALLY INSPECTED THE APCH CORRIDOR PRIOR TO TAXIING ONTO THE RWY. SEVERAL FACTORS MAY HAVE CONTRIBUTED TO THIS SIT: MY INEXPERIENCE IN ACFT TYPE WHICH MAY HAVE LED TO PREOCCUPATION WITH PRE-DEP CHKLISTS AND RUN-UP PROCS TO THE DETRIMENT OF MY CONCENTRATION ON RADIO XMISSIONS; MY RELATIVE INEXPERIENCE IN FLYING FROM UNCTLED GA ARPTS; WHICH MAY HAVE LED ME TO EXPECT TO SEE OTHER AIRPLANES AT CERTAIN ALTS/DISTANCES FROM THE RWY WHEN IN FACT THIS ACFT WAS PROBABLY IN A POS RELATIVE TO THE RWY THAT I DID NOT EXPECT; AND THE PROBABLE HEAD-ON ASPECT OF THE LNDG ACFT COMBINED WITH THE HAZY VISIBILITY PROBABLY MADE THE ACFT MORE DIFFICULT TO SEE. LESSONS LEARNED: BE MORE ATTENTIVE TO XMISSIONS ON THE CTAF AND MAKE A MORE THOROUGH VISUAL INSPECTION OF THE ARPT TFC PATTERN BEFORE TAXIING ONTO THE RWY.