LR24 CREW TAKES EVASIVE ACTION TO AVOID DEPARTING TFC AT CNW.

Narrative

WE HAD BEEN IN CNW FOR APPROX 3 HRS WORKING WITH THEIR APCH; TWR; AND GND CTLRS; EXECUTING MULTIPLE APCHS AND TRAINING MANEUVERS IN A LEARJET 24F ACFT. AS THE DAY PROGRESSED; WINDS HAD SHIFTED TO THE N AND CNW BEGAN USING RWY 35R FOR TKOFS AND LNDGS. WE CONTINUED TO PRACTICE PRECISION APCHS USING THE ILS RWY 17L CNW AND; WORKING WITH THE ATC CTLRS; WOULD FLY THE APCH TO ILS RWY 17L CAT C MINIMUMS AND THEN EXECUTE THE MISSED APCH. ATC WAS ISSUING US MODIFIED MISSED APCH INSTRUCTIONS; WHICH GENERALLY RANGED FROM CLBS TO 2300-2700 FT MSL AND TURNS TO THE L TO HDGS AROUND 060-080 DEGS. WE HAD BEEN CLRED FOR THE ILS RWY 17L. WE HAD JUST PASSED THE FAF INBOUND AT APPROX 1600 FT MSL ON THE LOC AND GS. A MIL B707 THAT HAD BEEN DOING TRAINING IN THE AREA HAD JUST DEPARTED RWY 35R AT CNW AND WAS IN A CLBING L TURN. I HAD VISUAL CONTACT WITH THE B707 WHILE MY STUDENT CONTINUED TO FLY THE APCH. WE WERE IN RADIO CONTACT WITH THE TWR AND THEY ANNOUNCED 'LEAR XXX EXECUTE MISSED APCH.' WE PERFORMED OUR LEARJET PROCS TO FLY THE MISSED APCH. AT THAT POINT THE TWR TOLD US TO TURN L 080 DEGS IMMEDIATELY; WHICH I ADVISED WE HAD ALREADY BEGUN. I THEN TOOK THE CTLS FROM THE STUDENT AND ROLLED THE ACFT INTO A 45 DEG BANK TO THE L UNTIL 080 DEG HDG WAS ACHIEVED AND WE CONTINUED THE MISSED APCH. EVEN THOUGH VISUAL CONTACT WAS HELD BTWN OUR LEARJET AND THE B707; MY CONCERN IS THE LACK OF PLANNING FROM THE TWR AS TO THE SEPARATION OF MY ACFT ON THE ILS RWY 17L AND TO THE DEPARTING B707 ON RWY 35R. WE ARE NOT EQUIPPED WITH TCASII; HOWEVER; THE B707 MAY HAVE BEEN; AND COULD HAVE RECEIVED AN ALERT. I BELIEVE THAT IF WE HAD BEEN TOLD TO EXECUTE THE MISSED APCH EARLIER THAT THIS SIT WOULD HAVE BEEN AVOIDED. WE DISCUSSED THIS SIT WITH TWR UPON LNDG AND CONTINUED TRAINING WITHOUT FURTHER INCIDENT.