AN 8IAI-MARCHETTI ENCOUNTERED SEVERE WAKE TURB 1 MI BEHIND AND 700 FT BELOW A HVY.

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ABOUT 7 NM NW OF LCK; MONITORING APCH ON 119.15; I HEARD CTLR HANDLING 2 ACFT INBOUND TO LCK; ONE OF WHICH WAS A 'HVY.' I ESTABLISHED VISUAL CONTACT WITH BOTH. THE CTLR CLRED BOTH OF THEM FOR APCH TO RWY 22. I ELECTED TO PASS BEHIND AND BELOW THE 'HVY;' BEING 1 MI BEHIND AND 700 FT BELOW. I HIT THE WAKE OF THE 'HVY' AT A 90 DEG ANGLE AND WAS THROUGH IT QUICKLY. I WAS USING MY SEATBELT AND SHOULDER HARNESS. THE TURB WAS CLOSE TO SEVERE. MY HEAD HIT THE CANOPY; FRACTURING THE CANOPY. AN ONBOARD TOOL KIT AND MY CELL PHONE DEPARTED THE COCKPIT THROUGH THE HOLE IN THE CANOPY. I PROCEEDED TO OSU ARPT AND LANDED UNEVENTFULLY. DURING THE WAKE ENCOUNTER. I MAY HAVE ENTERED THE CMH CLASS C AIRSPACE. SOMETHING ALSO STRUCK THE LEADING EDGE OF THE AIRPLANE'S L HORIZ STABILIZER NEAR THE ROOT. AFTER LNDG; THE G METER WAS PEGGED AT +2 AND -6. NO OTHER APPARENT DAMAGE TO MY ACFT WAS NOTED. I SHOULD HAVE GIVEN THE HVY ACFT A WIDER BERTH; AND SHOULD HAVE PASSED ABOVE IT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE HAD EXPECTED THE WAKE TO BE 300 FT BELOW THE HVY ACFT AND SO WOULD HAVE ANTICIPATED ABOUT A 400 FT WAKE TURB CLRNC. HE BELIEVED; BUT DID NOT KNOW FOR SURE; THAT THE ACFT WAS A KC-135. HE NOW KNOWS THAT IN THE LNDG CONFIGN; THE WAKE DSNDS MORE QUICKLY. HE WAS NOT WEARING A HELMET AT THE TIME AND HIS RADIO HEADSET CONTACTED AND BROKE THE CANOPY.