BE55 PLT CLBS INTO CLT CLASS B AIRSPACE THINKING HE WAS CLR OF AIRSPACE.

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DEPARTED MONROE ARPT (EQY) SEBOUND TO JOIN V37 TO COLUMBIA (CAE); UNDER VFR CONDITIONS. CLASS B AIRSPACE IN THAT AREA IS 10000 FT CEILING AND 6000 FT FLOOR. CLBED TO 6500 FT CRUISE ALT AND ASSUMED I HAD CLRED THE CLASS B AIRSPACE. ATC RPTED I WAS IN CLASS B AIRSPACE. PART OF THE AIRSPACE CHANGES THE FLOOR TO 4600 FT. PLT COULD HAVE MADE RADIO CONTACT WITH CLT DEP CTL WHICH WOULD HAVE PROVIDED RADAR ADVISORY; THUS AVOIDING THE INCURSION. CLASS B AIRSPACE COULD BE RAISED TO A HIGHER LEVEL OF 7000 FT OR 8000 FT IN THE OUTER RING OF THE CLASS B AIRSPACE. ON LONG FLTS THE USE OF BOTH IFR ENRTE LOW ALT CHARTS AND SECTIONAL AERO CHARTS IS CONFUSING AND DIFFICULT FOR A SINGLE PLT'S USE. YET BOTH CHARTS ARE NECESSARY IN ORDER TO ACCESS ALL OF THE REQUIRED INFO FOR CLASS B AIRSPACE AND THE NAV AIRWAYS. PLT CONTRIBUTES THE PRIMARY REASON FOR THE NAV ERROR WAS A HUMAN FACTOR. SHORTLY BEFORE TKOF; THE PLT'S WIFE; WHO ACCOMPANIED THE FLT; WAS ADVISED OF A FAMILY PROB WITH A DAUGHTER THAT THE PLT; UPON REFLECTION; BELIEVES CREATED AN EMOTIONAL STRESS DURING THE FLT.