INSTRUCTOR TRAINEE OF SMA SEL ACFT INADVERTENTLY DELAYED TKOF CAUSING TWR CTLR TO EXPEDITE SEPARATION BY DIRECTING AN IMMEDIATE TURN AFTER TKOF FOR LNDG ACR JET TFC.

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ON THE ABOVE STATED DATA AND TIME I WAS WITH A STUDENT. UPON REACHING THE RWY HE CONTACTED PHX TWR AND INFORMED THEM WE WERE HOLDING SHORT OF RWY 8L AND READY FOR DEP. THEY SAID BE 'READY FOR AN IMMEDIATE DEP.' AT THIS TIME AN MLG ACR JUST LANDED ABOUT 2000-2500 FT AHEAD OF US AND ANOTHER MLG JET WAS ON APPROX 5-7 MI FINAL. I SAW THE TFC AND WAS TOLD BY THE TWR 'CLRED FOR TKOF.' WE STARTED OUR TKOF ROLL DOWN THE RWY; BUT NOT AT FULL PWR (ABOUT 1/2 PWR) SINCE WE NEEDED TO TKOF PAST THE POINT WHERE THE MLG ACFT 2000 FT DOWN RWY LANDED. OUR SMA SEL TAKES OFF AT FULL PWR IN APPROX 700-1000 FT. SUDDENLY AT ABOUT 1500- 2000 FT DOWN THE RWY THE CTLR SAID WHY WE HADN'T LIFTED OFF YET AND THEN TO IMMEDIATELY TURN 20 DEGS L; THAT THERE WAS A LARGE JET ABOUT TO LAND. UPON BEING AIRBORNE WE TURNED L. WE WERE TOLD TO CONTACT THE TWR BY PHONE AT OUR DEST. KEY NOTES: WE WERE NEVER CLRED FOR AN IMMEDIATE TKOF ONLY TO BE READY. WE WERE NEVER TOLD WHERE THE OTHER TFC WAS (I.E.; 1 MI FINAL) AND WE WERE NOT GIVEN MUCH ROOM TO AVOID THE WAKE TURB OF THE PRECEDING LNDG ACFT. I REALIZE BIG AIRLINERS MAY NEED SOME MORE PRIORITY BECAUSE OF THE NUMBER OF PEOPLE INVOLVED AND DOLLARS; BUT I THINK A CTLR WHOSE SPACING PLANS DIDN'T WORK OUT RIGHT IS BETTER THAN 2 PEOPLE GETTING KILLED BECAUSE THEY DIDN'T AVOID WAKE TURB!