4 ms·AIUI, drag scales as v³, the reason doubling horsepower adds only a trivial amount of speed.by moloch-hai 4y agoAIUI, drag scales as v³, the reason doubling horsepower adds only a trivial amount of speed.aidenn0 4y agoYou are both right, there are v^2 and v^3 effects, and depending on the speed regime, one or the other will dominate.AdrianB1 4y agoIn the pilot books in my country the v2 is the most significant factor, v3 is not even mentioned in General Aviation.