A C172 experienced a near midair collision with a C182 at heg.

Attributes
ACN	809188
Time
Date	200810
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : heg.airport
State Reference	FL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	None
Aircraft 2
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : cfi pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 20 flight time total : 335 flight time type : 300
ASRS Report	809188
Events
Anomaly	conflict : nmac non adherence : company policies
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 50 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We departed on a training flight. After air work in the south practice area we departed the practice area to heg. Arriving at heg I entered left downwind for runway 7. Winds were calm. I reported downwind; base and final for each pattern lap. On the 3RD pattern a C182 reported to be taxiing to runway 25. I continued approach for runway 7 and reported that I would be doing a touch and go. As I added power on my departure roll I noticed the C182 on the takeoff roll on runway 25. I immediately reduced power and applied brakes and right rudder. The C182 did the same. We passed at midfield within 50 ft from each other. At no time did I hear any other radio calls to the C182 or other aircraft. I returned to the run-up area and tried to reach the other aircraft. I had no response. Note: when taking off runway 7 or runway 25 you are unable to see the other end of the runway due to crown in the center of the airport.

Original NASA ASRS Text

Title: A C172 EXPERIENCED A NMAC WITH A C182 AT HEG.

Narrative: WE DEPARTED ON A TRAINING FLT. AFTER AIR WORK IN THE S PRACTICE AREA WE DEPARTED THE PRACTICE AREA TO HEG. ARRIVING AT HEG I ENTERED L DOWNWIND FOR RWY 7. WINDS WERE CALM. I RPTED DOWNWIND; BASE AND FINAL FOR EACH PATTERN LAP. ON THE 3RD PATTERN A C182 RPTED TO BE TAXIING TO RWY 25. I CONTINUED APCH FOR RWY 7 AND RPTED THAT I WOULD BE DOING A TOUCH AND GO. AS I ADDED PWR ON MY DEP ROLL I NOTICED THE C182 ON THE TKOF ROLL ON RWY 25. I IMMEDIATELY REDUCED PWR AND APPLIED BRAKES AND R RUDDER. THE C182 DID THE SAME. WE PASSED AT MIDFIELD WITHIN 50 FT FROM EACH OTHER. AT NO TIME DID I HEAR ANY OTHER RADIO CALLS TO THE C182 OR OTHER ACFT. I RETURNED TO THE RUN-UP AREA AND TRIED TO REACH THE OTHER ACFT. I HAD NO RESPONSE. NOTE: WHEN TAKING OFF RWY 7 OR RWY 25 YOU ARE UNABLE TO SEE THE OTHER END OF THE RWY DUE TO CROWN IN THE CTR OF THE ARPT.

Data retrieved from NASA's ASRS site as of May 2009 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.