Originally Posted by Rockin Robbins
Non-responsive. Try again. I said that manufacturer and model number are more important than diameter and pitch. Your turn. Danger: next I trot out actual data. Would you believe that a 12x6 prop can draw fewer amps than an 11x4.7? The water could get very deep if you wish to continue with your incorrect line of reasoning.
I guess you just refuse to read what I wrote. Nothing will be more accurate than testing your props in person-even if your calculator is more accurate. There are also lots of motors (thousands) available, so your calculator most like won't have individual motors listed.
Test different propellers with a thrust stand and a watt meter. Use the one with the highest thrust and lowest power ratio. If you are calculating pitch speed too, then just pick the highest thrust-power with your pitch speed.