ATC HANDLING OF TFC PATTERN TFC.

Narrative

ON THIS DATE I FERRIED A NORTH AMERICAN T-6 FROM 3SZ TO SUS FOR AN UPCOMING AIRSHOW. I CONTACTED THE TWR WELL N AND WAS INSTRUCTED TO RPT ON A FLT BASE LEG FOR RWY 26L WHEN XING THE MISSOURI RIVER. AS I APCHED THE CHKPOINT; THE TWR ASKED MY POS (THEIR TWR RADAR REPEATER SCOPE WAS INOP). I INDICATED I WAS NOW ON R BASE FOR RWY 26L; JUST N OF THE RIVER AND I WAS CLRED TO LAND. MOMENTS LATER I HEARD THE TWR BEGIN A DISCUSSION WITH A BEECH BARON. THE TWR THEN ASKED IF I SAW THE BARON AND I INDICATED THAT I SAW A TWIN ON A LONG FINAL OVER THE LOW LANDS; NE OF THE RWY. THE TWR THEN DIRECTED ME TO EXECUTE A L 360 DEG TURN INTO THE FINAL AND ASSUME A POS BEHIND THE BARON. I DECLINED THIS AND REQUESTED R 360 DEG SO AS NOT TO BE HEAD TO HEAD WITH THE BARON. A LONG PAUSE ENSUED AND AGAIN I REQUESTED A R 360 DEGS AND IT WAS GRANTED. THE TWR THEN INSTRUCTED A MOONEY TO MAKE A 360 DEG ON R DOWNWIND AND SEQUENCE BEHIND ME. THE MOONEY DECLINED AND REQUESTED AN OPPOSITE DIRECTION 360 DEGS TO AVOID A CONFLICT. ABOUT THIS TIME A N AMERICAN B-25 ON A L DOWNWIND WAS ISSUED A 360 DEG FOR SPACING. WE ALL LANDED WITH NO CONFLICT; HOWEVER; I DISCUSSED THE ARR WITH BOTH THE B-25 PLT AND MOONEY PLT AFTER LNDG. WE ALL 3 AGREE THAT THE CTLR WAS CONFUSED AND A BIT UNCERTAIN AS TO HOW TO SEQUENCE ACFT OF SUCH A WIDE SPD RANGE. THE USE OF EXTENDED DOWNWINDS; SPD ADJUSTMENTS OR FLT THROUGH INITIAL WOULD HAVE ALL BEEN PREFERENTIAL TO 360 DEG TURNS IN THE PATTERN AGAINST TFC. IN ADDITION; CHANGING LNDG SEQUENCES; CLOSE IN IS DANGEROUS ESPECIALLY WHEN ACFT ARE ALREADY CONFIGURED FOR LNDG.