C172 PLT CAME WITHIN 50 FT OF HITTING AN ULTRALIGHT AT SYN.

Narrative

I WAS FLYING AN ORIENTATION FLT FROM FCM TO SYN; VFR. I MADE ALL MY TFC CALLS FOR RWY 27 AS I APCHED FROM THE NW INCLUDING 10 NM; 5 NM; OVERFLYING THE ARPT; CIRCLING TO ENTER DOWNWIND; DOWNWIND; BASE AND FINAL; AND CONCLUDING EVERY XMISSION WITH THE STATEMENT 'ANY TFC IN THE AREA PLEASE ADVISE.' MY ACFT WAS LIT UP WITH ITS LNDG; RUNNING; STROBES; AND NAV LIGHTS ON. WHILE ON SHORT FINAL FOR RWY 27; I RECEIVED A CALL ON 122.8 CTAF STATING 'ACFT LNDG AT STANTON; DO YOU SEE THE ULTRALIGHT WHO DEPARTED ON RWY 36 AND IS TURNING RIGHT TOWARDS YOU!' I DIDN'T SEE THE TFC AT FIRST; BUT IN SECONDS; I SAW A DARK COLORED ULTRALIGHT APPEAR OVER THE RWY FROM A DARKLY COLORED PLOWED FIELD JUST TO THE N OF RWY 27. HE WAS AIMED RIGHT AT ME. THE ULTRALIGHT WAS PITCHED UP QUITE HIGH; NO RUNNING LIGHTS. I'M NOT SURE HE EVEN SAW ME -- CLBING QUICKLY IN MY DIRECTION. I QUICKLY MADE THE DECISION TO DSND DUE TO MY CONFIGN AND TAS (FULL FLAPS; AND 60-65 KTS; DSNDING AT 500 FPM). I PULLED THE THROTTLE OUT AND PUSHED THE NOSE DOWN TO QUICKLY DSND TO THE RWY BELOW. WE MISSED BY LESS THAN 50 FT; THE ULTRALIGHT CLBING OVER THE TOP OF US. ON MY LNDG; DUE TO THE DRAMATIC NOSE DOWN PITCH; MY TAS INCREASED. MY FLARE SLOWED ME DOWN TO THE POINT OF TOUCHDOWN; AFTER A SLIGHT RIDE IN GND EFFECT. I BELIEVE MY TOUCHDOWN WAS APPROX 400-500 FT DOWN THE RWY (RWY TOTAL LENGTH 1950 FT). WHEN I TOUCHED DOWN; I COULD NOT SLOW THE AIRPLANE DOWN ON THE DRY GRASS RWY; AND I APPLIED FULL BRAKES; WHICH EVENTUALLY LOCKED UP. THE ACFT FINALLY SLOWED DOWN; BUT AT THE END OF THE RWY; RAN OFF BY A FEW FT (LESS THAN 5 FT) WHILE TRYING TO TURN AROUND. THE AIRPLANE WAS STUCK IN THE DIRT AND I HAD TO HAVE SOME HELP PUSHING IT OUT. AFTER GETTING THE AIRPLANE UNSTUCK; I CHKED OVER THE ACFT FOR ANY DAMAGE. THE ACFT HAD A SMALL NICK ON THE PROP (MOST PROBABLY FROM A ROCK); BUT NOTHING I BELIEVED WOULD MAKE THE ACFT UNAIRWORTHY. I FLEW THE ACFT BACK TO FCM. I THEN CALLED MY FLT RELEASE OFFICER TO NOTIFY HIM OF WHAT HAD TRANSPIRED.