USING VISUAL REFS; AN UNAUTH CLE CLASS B ENTRY OCCURRED AFTER TKOF VFR IN HOPES OF BEING ABLE TO GET IFR CLRNC IN THE AIR AFTER BEING UNSUCCESSFUL ON THE GND AT LPR; OH.

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WHILE PREPARING TO DEPART LPR FOR ILG; WE ATTEMPTED TO CONTACT CLEVELAND APCH FOR OUR IFR CLRNC. WE WERE UNABLE TO CONTACT CLEVELAND APCH DESPITE NUMEROUS CALLS. ASSUMING THAT OUR COM PROB WAS DUE TO GND INTERFERENCE; AND SINCE THE WX WAS CLR; PLUS THE FACT THAT OUR FREIGHT WAS URGENTLY NEEDED AT OUR DEST; THE CAPT DECIDED TO DEPART UNDER VFR AND GET OUR IFR CLRNC AFTER BECOMING AIRBORNE. AS WE WERE ABOUT TO DEPART RWY 7 AT LPR; WE NOTED NUMEROUS LIGHT ACFT IN THE TFC PATTERN PARTICIPATING IN TRAINING AND/OR ARR FOR A SCHEDULED EVENT AT LPR. THE CAPT DECIDED; FOR SAFETY REASONS; TO DEPART THE TFC PATTERN TOWARD THE SSE RATHER THAN ATTEMPT TO MIX WITH SLOWER ACFT IN LPR'S TFC PATTERN. BEGINNING AT APPROX 500 FT AGL; WE ATTEMPTED TO CONTACT CLEVELAND APCH AS OUR NAV RADIOS WERE SET TO CANTON VOR (OUR 1ST NAV FIX). THE CAPT ATTEMPTED TO REMAIN CLR OF CLEVELAND'S CLASS 'B' USING VISUAL ESTIMATES. THE CAPT LEVELED THE ACFT AT 3700 FT MSL BELIEVING WE WERE OUTSIDE THE 3000 FT CLASS B RING. FINALLY; AGAIN AFTER NUMEROUS TRIES; WE CONTACTED CLEVELAND APCH. WHEN WE RECEIVED OUR XPONDER CODE; WE WERE TOLD WE WERE INSIDE CLASS B AND TO IMMEDIATELY DSND TO 3000 FT; (WHICH WE COMPLIED WITH); AND TO CONTACT CLEVELAND APCH ON ANOTHER FREQ FOR OUR CLRNC. AFTER WE RECEIVED OUR CLRNC; WE WERE TOLD TO CONTACT CLEVELAND APCH BY PHONE WHEN WE LANDED AT ILG. WE NOTED THAT ALL THE FREQS HAD BEEN PARTICULARLY 'QUIET' AND THE FLT PROCEEDED WITHOUT FURTHER INCIDENT. AFTER ARR AT ILG; THE CAPT CALLED CLEVELAND APCH AND WAS TOLD THAT THEY SHOWED US AT 4200 FT AND 10 DME FROM CLEVELAND (INSIDE CLASS B). CLEVELAND FURTHER ADVISED THE CAPT THAT THERE WERE NO ACFT AFFECTED BY OUR INCURSION INTO THE CLASS B AS THERE WERE NONE IN OUR VICINITY; CONFIRMING OUR 'QUIET FREQ' SUSPICION.