DURING HAND PROP ENG START WITHOUT ASSISTANCE AVAILABLE THE AIRPLANE STARTED AND JUMPED THE CHOCKS AND RAN INTO A WALL.

Narrative

ON A VFR FLT BY MYSELF FROM MY HOME AIRSTRIP TO PORT TOWNSEND MY ACFT BEGAN TO DEVELOP CARB ICE -- FULL CARB HEAT DID NOT CORRECT THE PROB SO I LANDED AT THE VASHON ISLAND AIRSTRIP. PWR AVAILABLE NOW WAS ABOUT 1300 RPM. LNDG NO PROB; ENG SHUTDOWN. WHERE I OPENED COWL AND INSPECTED THE ENG -- NO VISUAL SIGN OF PROBS; I WAS SURE IT WAS CARB ICE. HAVING NO ELECTRICAL/STARTER SYS I HAVE TO HAND PROP ACFT. I HAVE BEEN PROPING THIS TYPE OF ACFT FOR MANY YRS -- ALL WITH NO PROB UNTIL TODAY. I CHKED COCKPIT CTLS AS ALWAYS; TURNED ON THE MAGNETIC SWITCH AND WENT TO THE FRONT TO TRY TO RESTART THE ENG. I DID NOT FIRE ON THE FIRST 2 PULLS ON THE PROP. ON THE THIRD START ATTEMPT THE ENG SPUTTERED TWICE THEN RAN UP TO AROUND SOME UNKNOWN RPM BUT ENOUGH FOR IT TO JUMP THE CHOCKS AND THEN TURN TO RUN INTO A HANGAR 50 FT AWAY. THE ENG RETURNED TO IDLE UNTIL I TURNED OFF THE MAGNETOS. HAVING STARTED ACFT THIS WAY 3000 PLUS TIMES; THIS WAS A SHOCK TO ME FOR SURE. DAMAGE TO THE HANGAR WAS 4 FIBERGLASS PANELS AND SUPPORTS BROKEN. REPAIR COSTS WERE $55. DAMAGE TO THE ACFT WAS THE R WING TIP BOW BROKEN; FABRIC DAMAGE; PROP HAD SEVERAL NICKS. ACFT COULD HAVE BEEN FLOWN HOME BUT WAS DISASSEMBLED AND TAKEN HOME. MY THOUGHTS ABOUT THE SUDDEN RUNUP IN RMP THEN RETURN TO SOLE WAS THAT THE CARB ICE WHEN CLRED MUST HAVE CAUSED THIS OR EXCESS GAS WAS SOMEHOW TRAPPED AND ONCE USED; ACFT ENG RETURNED TO NORMAL RPM. HAVING NO ONE TO PROP ME OR NO EASY PLACE TO TIE THE TAIL TO SOMETHING; I'M SURE COMPLACENCY ON MY PART ALLOWED THIS TO HAPPEN.