SMA TOOK OFF OVER AN SMT THAT HAD ENTERED RWY WITHOUT ANNOUNCEMENT FOR TKOF IN THE OPPOSITE DIRECTION.

Narrative

JUST AFTER XAOO; WE WERE PREPARING FOR A DEP FROM RWY 8 AT FTY. HAVING FINISHED OUR RUN-UP AND IT BEING AFTER TWR CLOSURE TIME; WE BROADCASTED ON THE CTAF/TWR FREQ 'TAKING RWY 8 FOR DEP.' MY STUDENT VISUALLY CLRED THE FINAL FOR RWY 8; AND I CLRED DOWN THE RWY AND THE FINAL FOR RWY 26; AND ALL APPEARED CLR; WHICH I VERBALLY COMMUNICATED. WE TOOK THE RWY WITH ALL LIGHTS ON; AND IMMEDIATELY AFTER ADVANCING THE PWR TO FULL; I NOTICED A WHITE BEACON ON THE TXWY THAT LEADS ONTO THE END OF RWY 26. I KEPT MY EYE ON THE OTHER ACFT AND WAS QUITE SURPRISED WHEN; WITHOUT STOPPING AT THE HOLD LINE OR BROADCASTING INTENTIONS; THE OTHER ACFT ROLLED ONTO THE RWY AND SWITCHED ON LNDG LIGHTS. SINCE WE WERE JUST SHORT OF ROTATION SPD; I INSTRUCTED THE STUDENT TO CONTINUE THE TKOF AND SIDESTEP TO KEEP THE OTHER ACFT; WHICH I BELIEVE WAS A PISTON TWIN SIMILAR IN SIZE TO A CESSNA 400-SERIES OR NAVAJO; IN SIGHT. I WAS ABOUT TO BROADCAST A WARNING TO THE OTHER ACFT; WHEN A CHALLENGER; PARKED AT AN FBO; ANNOUNCED HIS TAXI. AFTER THE CHALLENGER; I ANNOUNCED 'ACFT ON RWY 26; I DON'T KNOW IF YOU INTEND ON USING YOUR RADIO; BUT I SUGGEST YOU LOOK BEFORE YOU TAKE THE RWY.' I HEARD A RESPONSE LIKE 'AND YOU.' BUT IT SOUNDED LIKE THE CHALLENGER MAY HAVE MISTOOK MY CALL AS BEING DIRECTED TO HIM. IT BOTHERS ME THAT THE OTHER ACFT; WHICH STARTED ITS TKOF ROLL BEFORE WE HAD PASSED OVERHEAD; NEVER PAUSED TO LOOK AND NEVER USED ITS RADIO. THE NEXT RADIO CALL ON THE FREQ WAS AS THE CHALLENGER DEPARTED. ALL DAY RWY 26 HAD BEEN IN USE AND THE WIND AT THE TIME WAS 2-5 KTS OUT OF THE NW; FAVORING RWY 26; BUT RWY 8 IS THE CALM WIND RWY AT FTY; SO PERHAPS THE OTHER PLT NEVER CONSIDERED OPPOSITE DIRECTION TFC.