A HIGH PERFORMANCE ALPHA JET DEPARTING AWO WAS TURNED SW INTO PAE ARR TFC WHEN CTLR DID NOT RECOGNIZE WIDE RADIUS HIGH SPD TURNS REQUIRED DURING VECTORING.

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THE MISSION WAS FOR AN ALPHA JET BASED AT ARLINGTON; WASHINGTON ARPT; CALL SIGN 'ACFT X.' FILED IFR FLT PLAN FROM AWO (ARLINGTON) TO NAVY NORTH ISLAND; CA. WX WAS APPROX 2000 FT; 9 NM IN MOST QUADRANTS WITH SOME RAGGED EDGES. ARLINGTON DOES NOT HAVE A CTL TWR AND RADIO CONTACT WITH ZSE CANNOT BE MADE UNTIL APPROX 1500 FT MSL. I TOOK OFF VFR AND CONTACTED ZSE WHILE TURNING WBOUND TO AVOID SEATTLE AIRSPACE (TO THE S) AND PAINE FIELD (ALSO TO THE SSW). I CONTACTED ZSE AND CTLR ASKED ME IF I COULD CLB TO 2000 FT AND MAINTAIN VFR. ON PRESENT HDG OF APPROX 250 DEGS; THAT WAS NO PROB. I CLBED TO 2000 FT AND SEATTLE ASSIGNED A NEW SQUAWK AND SAID HE HAD IDENTED ME AND ASKED ME TO TURN TO HDG OF 130 DEGS AT 2000 FT. PASSING A HDG OF ABOUT 190 DEGS; SEATTLE ASKED ME IF I WAS TURNING. I REPLIED THAT I WAS IN FACT; AND WAS TURNING 1/2 WAY THROUGH THE TURN. HE SAID I HAD TFC GOING INTO PAINE FIELD. I COULD NOT SEE THE TFC. I THINK HE WAS ON AN ILS AT 2500 FT. IT LOOKED LIKE THAT ACFT MIGHT HAVE BEEN IN THE WX ON THE APCH. I CONTINUED MY TURN; ROLLED OUT ON 130 DEGS AND COMMENCED A CLB (AT CTLR'S DIRECTION) TO 3000 FT. I NEVER SAW THE TFC CONFLICT AT PAINE FIELD AND ASSUMED HE WAS IN THE WX ABOVE ME AND TO THE S OF ME. REMAINDER OF FLT TO NAVY NORTH ISLAND; CA; WAS UNEVENTFUL. IT IS UNKNOWN WHY THE CTLR TURNED ME TOWARD (L TURN) PAINE FIELD (FROM MY INITIAL CONTACT POS N OF THE FIELD) INSTEAD OF A LONG WAY AROUND TURN TO THE N (R TURN) THEN BACK TO THE 130 DEG HDG. I THINK THAT WOULD HAVE MINIMIZED THE POSSIBILITY OF CONFLICT FROM ANY ACFT GOING INTO PAINE FIELD. IT MUST ALSO BE NOTED THAT THIS IS A HIGH PERFORMANCE JET AND THE TURN RADIUS AT 250 KIAS IS PROBABLY MUCH GREATER THAN WHAT THE CTLR NORMALLY SEES AND THAT COULD HAVE COMPLICATED THE PROB. IN SUMMARY; THE CTLR WAS VERY PROFESSIONAL AND DID NOT SEEM ALARMED; BUT FOR FUTURE DEPS OUT OF ARLINGTON; IT MIGHT BE BETTER TO TURN ARLINGTON DEPS AWAY FROM INSTEAD OF INTO PAINE FIELD. THANK YOU VERY MUCH.