Skylane 182/RG Turbo Skylane/RG
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 1.5; Flight Crew Total 1565; Flight Crew Type 1560
Communication Breakdown
Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors
After the preflight check I started the engine and taxied to the active Runway 36. Prior to crossing Runway 9-27 en route I stopped; looked and broadcast my intention to cross and back taxi on Runway 9 on 122.8. I completed the back taxi and did my runup in the runup area at the end of Runway 36. I again looked for landing traffic; called on Unicom and entered Runway 36.As I started my takeoff roll I noted a Piper above and moving ahead of me. I wondered why he was there but figured it was someone being stupid or someone doing a go around. I stayed in ground effect until I could determine which way the Piper would turn off the center-line of Runway 36 then as he had pulled further ahead and to the left I turned right to the east gaining more separation.When I had climbed to 2;500 FT I pulled a chart from the backseat to double check the radio frequency. Then it hit me that I had been calling on the wrong frequency. Thus I had landed using an incorrect frequency on a weekend and had just reused it for this departure instead of the correct 122.7. The lesson I learned is to always recheck radio frequencies even though you have personally been the one who set them for an earlier flight.
A C-182 pilot who; inadvertently tuned to the wrong unicom frequency; was passed on his takeoff roll by a Piper making a go around.