NMAC IN UNCTLED ARPT PATTERN.

Narrative

I WAS IN THE TFC PATTERN AT AMERY ARPT PRACTICING TOUCH AND GOES; EMER LNDGS AND SIMULATED FLAME OUTS. WHILE DOING A SIMULATED FLAME OUT; WHICH IS STARTED AT 6500 FT OVER THE ARPT; I ENTERED THE DOWNWIND PORTION AND RPTED MY POS; ON THIS PARTICULAR PASS I WAS USING '0' FLAPS WHICH RESULTED IN AN EXCESSIVE RATE OF DSCNT AND HIGHER THAN NORMAL AIRSPD; I TURNED BASE AND FINAL. ON BASE I HEARD ANOTHER ACFT RPT DOWNWIND FOR THE SAME RWY; '18.' AS I DSNDED ON FINAL THROUGH APPROX 200 FT I SAW A C-150 LIFTING OFF RWY 36 -- COMING AT ME. I COMMENCED A MISSED APCH. I APPLIED FULL PWR. MY CONCERN WAS THAT THE (C-150) MAY START HIS L TURN OUT OF THE PATTERN; AND THE OTHER TFC ON DOWNWIND FOR RWY 18. I MOVED OVER TO THE L SIDE OF RWY 18; OVER THE GRASS AND STAYED DOWN ON THE DECK. THE C-150 WENT BY ON MY R. I COULDN'T FIND THE OTHER TFC; WHEN I OBTAINED SUFFICIENT SPD I PULLED UP INTO A STEEP CLB. I KEPT LOOKING FOR THE TFC ON EITHER SIDE OF ME. I MAINTAINED MY HIGH RATE OF CLB AND WHEN ALMOST VERT I SAW THE C-150 INDEED HAD TURNED L OUT OF THE PATTERN. I NEVER FOUND THE OTHER TFC. I BASICALLY DID A HIGH SPD LOW APCH TO AVOID BOTH UNSEEN TARGETS. WHEN I WAS AT 4000-4500 FT I ROLLED THE ACFT LEVEL AND RE-ENTERED THE PATTERN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR PLT IMPORTS; SELLS AND THEN TRAINS BUYER PLTS ON THE L29D 2 SEAT TRAINER. THUS; ON A TRAINING FLT WAS PRACTICING SIMULATED FLAME OUT APCHS. WINDS WERE LIGHT AND VARIABLE AND THE WX GOOD. RPTR HAD NOT HEARD THE C- 150 XMIT HIS POS; BUT; DUE TO THE WINDS; WAS NOT UNUSUAL THAT THE C-150 WAS TAKING OFF ON RWY 36 WHEN THE RPTR WAS LNDG ON RWY 18. RPTR DID HEAR A CHEROKEE ACFT ENTER THE TFC PATTERN; SO WHEN EXECUTING A GAR; HE DECIDED TO STAY LOW UNTIL CLR OF THE PATTERN BEFORE CLBING BACK UP. BOTH OF THE OTHER ACFT HAD DEPARTED THE PATTERN. RPTR SAYS THAT THE VICINITY OF A HIGH PERFORMANCE JET TRAINER PROBABLY AFFECTED THEIR DECISION TO DEPART.