MAC262 – ACFT Limits and Speeds Practice Test

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What is the Turb Penetration (Vb) speed?

184

170

Turbine Penetration speed (Vb) is the recommended maximum speed to fly through turbulent air or while penetrating convective weather with a turbine-powered airplane. It’s set to balance structural safety and controllability in gusty conditions, typically higher than stall but well below the airplane’s structural limits in turbulence.

For this aircraft, Vb is defined as 170 knots indicated, so that speed is the best choice for weather/turbulence penetration. The other numbers are not the turbine penetration value for this airplane.

125

140

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