INSTRUCTOR PLT AND STUDENT ON TKOF ROLL AT GLE ENCOUNTER A PA28 LNDG ON THE OPPOSITE END OF THE RWY RESULTING IN A NEAR MISS.

Narrative

FLT WAS BEING CONDUCTED AS A TRAINING FLT WITH STUDENT BEING THE PF. ASOS RPTED WINDS AS BEING 'CALM.' TFC LEVEL WAS LOW; AND TFC HAD BEEN USING BOTH RWYS 17 AND 35. SINCE RWY 17 IS GENERALLY USED AS THE CALM WIND RWY; WE TAXIED TO THE RUN-UP AREA FOR RWY 17. AFTER COMPLETING OUR RUN-UP; WE CHKED FOR TFC VISUALLY; AND ON THE CTAF. ONE ACFT; A PA28 HAD JUST TURNED DOWNWIND FOR RWY 35 AS WE TAXIED INTO POS; AND COMMENCED OUR TKOF RUN. WE WERE WELL ABOVE NORMAL ROTATION SPD; AROUND 65 KTS; AND HAD STILL NOT BROKEN GND. AT THIS POINT; THE PA28 WAS ON A SHORT BASE TO FINAL. WHEN I SAW THE PA28 ON FINAL; I TOOK CTL OF THE ACFT; AND ROTATED. I THEN IMMEDIATELY TURNED TO THE L IN ORDER TO AVOID THE OTHER ACFT. THE PA28 HAD INITIATED A GAR BY NOW; AND PASSED TO OUR R WITH APPROX 100 FT BTWN OUR WINGTIPS. SEVERAL FACTORS CONTRIBUTED TO THE CONFLICT. THE FACT THAT THE ARPT IS UNCTLED MEANS THAT ALL TFC DOES NOT ALWAYS USE THE SAME RWY; ESPECIALLY WHEN THE WIND IS LIGHT OR VARIABLE. ACCORDING TO THE ARPT FACILITY DIRECTOR; THERE IS NO CALM WIND RWY; BUT RWY 17 IS GENERALLY USED. ANOTHER FACTOR IN THIS SIT WAS THE PA28'S CLOSER THAN USUAL POSITIONING OF ITS BASE LEG. MY STUDENT ALLOWED AN UNUSUALLY LONG TKOF RUN. THIS WAS NOT ANTICIPATED. ULTIMATELY; IF THE PA28 WAS ALLOWED TO LAND BEFORE WE TOOK OFF; THE CONFLICT WOULD NOT HAVE HAPPENED.