Instructor with student reports near midair collision with C182; which started takeoff from opposite...

Narrative:

I was instructing a student in his new experimental aircraft. The student had just purchased the aircraft from the builder/former owner; and I was checking him out in the aircraft. We taxied to runway 25; making appropriate announcements on the CTAF. We heard unintelligible transmissions on the radio frequency. After our run up; we taxied into position on runway 25. The student had the controls and started the takeoff roll. As he lifted the tail; I saw an aircraft headed directly for us; using the opposite runway 7. I said; 'I have the controls;' and the student released his controls. The other aircraft began banking right. By this time; we were airborne; and I banked the airplane to our right. The other aircraft passed by on our left side; about 500 ft away. After we passed; I called on the radio and asked if the other pilot was on frequency. An unintelligible transmission followed. I responded that the transmission was unreadable. Another unreadable transmission followed. The student and I continued our training flight without incident. In discussing the incident later with a lineman in the FBO; they said that aircraft (the 182) had been having radio problems. There is no line of sight between runway ends at ZZZ. Winds were mostly calm; but runway 25 was slightly favored; according to the windsock.

Original NASA ASRS Text

Title: Instructor with student reports NMAC with C182; which started takeoff from opposite end of the same runway. The pilot of the C182 had radio problems; which made the reporter unaware of his intentions. Each pilot turned to avoid the other when airborne.

Narrative: I was instructing a student in his new experimental aircraft. The student had just purchased the aircraft from the builder/former owner; and I was checking him out in the aircraft. We taxied to Runway 25; making appropriate announcements on the CTAF. We heard unintelligible transmissions on the radio frequency. After our run up; we taxied into position on Runway 25. The student had the controls and started the takeoff roll. As he lifted the tail; I saw an aircraft headed directly for us; using the opposite Runway 7. I said; 'I have the controls;' and the student released his controls. The other aircraft began banking right. By this time; we were airborne; and I banked the airplane to our right. The other aircraft passed by on our left side; about 500 FT away. After we passed; I called on the radio and asked if the other pilot was on frequency. An unintelligible transmission followed. I responded that the transmission was unreadable. Another unreadable transmission followed. The student and I continued our training flight without incident. In discussing the incident later with a lineman in the FBO; they said that aircraft (the 182) had been having radio problems. There is no line of sight between runway ends at ZZZ. Winds were mostly calm; but Runway 25 was slightly favored; according to the windsock.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	837642
Time
Date	200905
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Aircraft 2
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Flight Phase	Takeoff
Person 1
Function	Instructor
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 1400 Flight Crew Type 43
Events
Anomaly	Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Instructor with student reports near midair collision with C182; which started takeoff from opposite end of the same runway. The pilot of the C182 had radio problems; which made the reporter unaware of his intentions. Each pilot turned to avoid the other when airborne.