← All explained questions · Supplemental · VII — Slow Flight, Stalls, and Spins
During a turn at slow flight airspeed (just above Vs), the airplane stalls earlier (at higher airspeed) than when wings level because
Choices
weight shifts forward during turns.
Weight doesn't shift in a coordinated turn.
✓ the load factor in a banked turn increases stall speed by √(load factor).correct
even modest banks raise Vs noticeably; combined with already being near Vs, you can enter an accelerated stall easily. Vs in a turn = Vs(1G) × √(load factor). Even a 30° bank raises Vs by ~7% (load factor ~1.15). At slow flight just above Vs, that 7% increase puts you into the stall. ACS standards limit slow flight bank to ≤20° to prevent inadvertent accelerated stalls. Coordinated rudder is critical to prevent yaw → spin if a wing drops.
the engine produces less power in turns.
Engine power doesn't drop in turns.
the magnetic compass interferes with the elevator.
Compass and elevator are unrelated.
Why
even modest banks raise Vs noticeably; combined with already being near Vs, you can enter an accelerated stall easily. Vs in a turn = Vs(1G) × √(load factor). Even a 30° bank raises Vs by ~7% (load factor ~1.15). At slow flight just above Vs, that 7% increase puts you into the stall. ACS standards limit slow flight bank to ≤20° to prevent inadvertent accelerated stalls. Coordinated rudder is critical to prevent yaw → spin if a wing drops.
FAA source: PHAK Ch 5, AFH Ch 4; PHAK Chapter 5 — Aerodynamics of Flightbrowse the reference library →
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.