During a spin to the left, which wing(s) is/are stalled?

Question

BlackTom AI · Accepted Answer

Question restatement: The prompt asks, during a spin to the left, which wing(s) is/are stalled?

Option 1: Both wings are stalled. This is unlikely in a spin to the left because the spinning motion typically results in the inside wing (the wing on the turn toward, i.e., the left wing in a left spin) reaching a higher angle of attack and stalling first, while the outside wing may still produce some lift. So, saying both wings are stalled overstates the common stall behavior in a standard spin.

Option 2: Neither wing is stalled. This is inconsistent with the fundamental physics of a spin. A spin involves stalled lift on one or both wings to maintain the stalled, autorotative condition; claiming neither wing is stalled contradicts the mechanism that sustains a spin.

Option 3: Only the left wing is stalled. In a left spin, the aircraft typically yaws and rolls toward the left, increasing the angle of attack on the left (inside) wing, which tends to stall while the right (outside) wing remains relatively less stalled or may still have some lift depending on the bank angle and control inputs. This aligns with common explanations of spin dynamics where the inside wing stalls and produces the rotational moment.

Putting the pieces together, the statements are evaluated against core aerodynamic principles: spins are maintained by at least one wing being stalled, and the inside wing in a left-hand spin is the one that is more likely to be stalled due to the geometry and angle of attack during the turn. The other options conflict with the observed mechanics of a turn-induced stall in a spin scenario.

Summary of reasoning per option:
- Option 1 (Both wings are stalled): not consistent with typical left-spin aerodynamics; overgeneralizes stall condition.
- Option 2 (Neither wing is stalled): contradicts the fundamental requirement for a sustained spin.
- Option 3 (Only the left wing is stalled): matches the expected left-spin behavior where the inside wing stalls and drives the rotation.

During a spin to the left, which wing(s) is/are stalled?单项选择题

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