# By what way and with which variables could you determine a planes maximum rate of climb per time?

user2247969
• By what way and with which variables could you determine a planes maximum rate of climb per time? user2247969

If I'm not mistaken, I'm looking for VY.

• You are correct that Vy will give you the max RoC. However Vy is actually only a speed, not a climb rate, and will correspond to slightly different rates of climb depending on a few factors. The ones that spring to mind are A/C weight, temperature, and density altitude. Along with power setting but that one is somewhat self explanatory. As for determining the speed, normally you would just consult your PPOH or AOM to find a performance chart that will give you the base speed and you can correct it for each of the variables listed in order to have a precise climb rate.

• Variables will have to include air conditions (temperature, humidity, altitude starting from), engine performance data at said altitude, and the vy speed for the airplane in question.

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• If I'm not mistaken, I'm looking for VY.

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