C152 PLT HAS AN OFF FIELD LNDG FOLLOWING THE LOSS OF ENG PWR.

Narrative

ON DSCNT TO LAND AT ZZZ IN MY C152; I EXPERIENCED SEVERE ENG ROUGHNESS DEVELOPING ABOUT 5 MI FROM THE ARPT. I IMMEDIATELY TRIED TO TROUBLESHOOT THE PROB BY ACTIVATING THE CARB HEAT AND SETTING THE MIXTURE TO FULL RICH. THIS HELPED RESTORE PWR FOR A FEW MOMENTS. HOWEVER; THE ENG ROUGHNESS DEVELOPED MORE SEVERE SYMPTOMS. I EXPERIENCED LARGER AND LARGER PWR LOSSES. AT FIRST I HAD PLANNED ON LIMPING THE PLANE BACK TO ZZZ. HOWEVER; AS THE ENG KEPT LOSING MORE PWR; I DECIDED TO TRY AND MAKE AN EMER LNDG IN THE LARGEST FIELD VISIBLE. THE ENG EVENTUALLY CUT OUT AND I MADE A GLIDING DSCNT INTO A LARGE CORN FIELD. UPON TOUCHING DOWN THE PLANE BOUNCED TWICE THEN FLIPPED OVER AS THE NOSEWHEEL COLLAPSED IN THE DIRT. MY PAX AND I WERE LUCKILY BOTH UNHARMED. UPON EXITING WE NOTICED THAT WE HAD A STRONG TAILWIND ON APCH. I FEEL THAT THIS PROB COULD HAVE BEEN CARB ICING. HOWEVER; I REALLY AM NO EXPERT. EARLIER IN THE FLT I FELT A SLIGHT ENG INCONSISTENCY THAT LED ME TO TURNING ON CARB HEAT. I LEFT IT ON FOR ABOUT 3 MINS. THE TOTAL FLT TIME WAS APPROX 30 MINS. VISUAL CONDITIONS EXISTED WITH GOOD VISIBILITY AND HIGH CEILINGS. THOUGH EVERYTHING TURNED OUT WELL FOR ME AND THE PAX; I FEEL THERE ARE A FEW THINGS THAT COULD HAVE MADE THIS SITUATION TURN OUT SLIGHTLY BETTER. I FEEL THAT A BETTER PROFICIENCY IN SOFT FIELD LNDGS WOULD HAVE HELPED THIS SITUATION. THIS WOULD HAVE PROBABLY HELPED NOT FLIP THE PLANE. SECONDLY; I FEEL THAT LNDG INTO THE WIND INSTEAD OF WITH A TAILWIND WOULD HAVE DRAMATICALLY AFFECTED THE OUTCOME. I FEEL THE LNDG WOULD HAVE BEEN MUCH SLOWER AND CTLED. THE TAILWIND PROVIDED MOMENTUM AIDING IN THE NOSE-OVER. I SHOULD HAVE KNOWN WE WERE LNDG IN A TAILWIND SINCE I KNEW WE TOOK OFF TO THE W ON DEP. I THINK ON THE POSITIVE SIDE MAINTAINING A LEVEL HEAD AND SOUND DECISION MAKING MADE THIS SITUATION HAVE A POSITIVE SAFE OUTCOME FOR MYSELF AND THE PAX. I THINK IF I HAD TRIED TO MAKE ZZZ WE WOULD HAVE ENDED UP MAKING A FORCED LNDG IN A MUCH WORSE PLACE.