I know that Vx for jet engines airplane is at Vmd and that Vy is at 1.32 Vmd; I do also know that Vy for propeller airplanes is at Vmd. Now I cannot figure out where i can get the Vx for propellers.
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Do you mean $V_{MD}$ or $V_{MC}$ – wbeard52 Jun 06 '17 at 14:15
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Vmd (minimum control speed) – Andrea Ghilardi Jun 06 '17 at 15:03
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The ratio between max. range and max. endurance speeds is always 3^0.25 = 1.316... It's the same for prop planes, jet planes, or gliders. – xxavier Jun 06 '17 at 15:34
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v$_{mD}$ is minimum drag speed, when induced and zero-lift drag are equal. – Peter Kämpf Jun 06 '17 at 19:40