I am having trouble with the TOC calculation. My field elevation is 2200 and climbing to 10,500. Do I calculate from field elevation or density altitude? We have high DA out in the desert.
Ideally you want to use the DA for the departure airport and cruise altitude. The reason is at high DA climb performance suffers. Your aircraft POH should give you the procedure, although some manufactures use PA.
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I don’t think I would plug the density altitude at the airport in as the ‘field elevation’ in the equation. But I would use it calculate the Verticle Speed to be plugged in. Not sure if it would make a difference. My answer is really a question