How does Vno differ from Vne?

• A. Vno is the maximum structural cruising speed for smooth air; exceeding Vno increases risk in rough air.
• B. Vno is the stall speed at maximum weight.
• C. Vno is the maximum operating Mach number.
• D. Vno is the average cruising speed under standard conditions.

Answer: (B)

Vno is the maximum structural cruising speed—the highest speed at which the aircraft is certified to fly in smooth air during normal operations. In rough air, you fly well below this limit because gusts and turbulence increase loads on the airframe, and you want a safety margin.

Vne is the never-exceed speed—the absolute upper bound you must not reach or pass under any circumstances, since going beyond it can cause immediate structural failure.

This isn't the stall speed, which depends on weight and configuration and represents the minimum speed needed to sustain level flight. So Vno sets a practical limit for normal flight in calm conditions, while Vne is the hard upper limit.