Universal Trainer Virtual Power

Do you have a dumb trainer and don't want to pay for expensive power measuring gear? Whether your trainer is magnetic, fluid, or otherwise, this data field allows you to set a resistance curve relating speed from a speedometer (m/s) to power (W). Simply measure or find an existing resistance curve and find the parameters of a cubic fit (easy with Wolfram Alpha). E.g. Parameters for the Lifeline TT-02 https://www.wolframalpha.com/input?i=cubic+fit+%7B%280%2C0%29%2C+%282.77778%2C+40%29%2C+%285.55556%2C103%29%2C+%288.3333%2C210%29%2C+%2811.1111%2C+400%29%7D