Power-off stall: at stick shaker, smoothly lower the nose to the horizon, or… — Page 191, Lesson 232

Let’s walk through the stall recovery procedures, because this is where the book turns from theory into the exact actions you’ll fly. I want you to notice the pattern first, because every aircraft type here follows the same skeleton, and the differences are all about what the engine and propeller are doing to you. Start with the multi-engine jet, the power-off stall. At the stick shaker — that’s your artificial stall warning, the device that shakes the control column to tell you the wing is about to lose lift — you smoothly lower the nose to the horizon, or just below it, to un-stall the wing. Lowering the nose reduces the angle of attack, which is what actually breaks the stall. Simultaneously, you increase power to the maximum recommended, and the reason is to minimize height loss. You prevent wing drop with roll control — that’s the ailerons. You raise the gear, and you select take-off flaps. So the sequence is: pitch down, power up, roll to hold the wings level, clean up the gear, and set take-off flaps. Now the power-on stall in the jet is simply “as with power-off.” Same drill. The jet doesn’t have a big propeller yanking you around, so the recovery is identical. Now move to the multi-engine propeller aircraft. The power-off stall recovery is nearly the same list, but with one critical change: you prevent wing drop with rudder and aileron control. Why the addition? Because with propellers, when you slam the power up, you get rapidly changing propeller torque and slipstream, and those create rolling and yawing moments you have to counter. So you need both rudder and aileron working together. The rest is the same: lower the nose to the horizon or just below, increase power to maximum recommended to minimize height loss, raise the gear, select take-off flaps. Here’s the key contrast the book draws: the primary difference between jet and propeller aircraft is that rapidly changing propeller torque and slipstream that becomes evident during power application. In a propeller aircraft, it is essential for the pilot to maintain co-ordination between rudder and aileron while applying the control inputs required to counter the changing rolling and yawing moments generated by the propeller — especially at high power settings or during rapid applications of power. And the bottom line: yaw must be prevented during a stall and recovery. Yaw is the nose swinging left or right, and in a stall that’s the doorway to a spin. Now the small aircraft — single-engine propeller. The power-off stall recovery is: at stall warning — note, in the small aircraft you get a stall warning rather than a stick shaker — smoothly lower the nose to the horizon or just below to un-stall the wing, simultaneously increase power to maximum recommended to minimize height loss, prevent wing drop with rudder, and raise the gear if applicable. So here it’s rudder alone for wing drop, and the gear is conditional — only if the aircraft has retractable gear. The power-on stall in a single-engine propeller aircraft has additional complications, and I want you to really understand this. At the high nose attitude and low airspeed associated with a power-on stall, there will be considerable “turning effects” from the propeller. Those are fully detailed in Chapter 16, but for now, know they exist. To maintain co-ordinated flight during the approach to, and recovery from, a power-on stall, you must compensate for those turning effects with the correct combination of rudder and aileron. And here’s the phrase I want you to remember: it is essential to maintain co-ordinated flight — ball in the middle — when close to the stall AND during recovery. The ball in the middle is your slip indicator; it tells you whether you’re flying coordinated. Any yawing tendency could easily develop into a spin. There’s one more effect to know. When the aircraft nose drops at the stall, gyroscopic effect will also be apparent, increasing the nose-left yawing moment — with a clockwise rotating propeller. So the very act of the nose pitching down at the stall adds a left-yaw tendency on top of everything else, and you have to be ready to counter it with rudder. And then the book gives you the real-world warning: an accidental power-on stall, during take-off or go-around, when a pilot’s attention is diverted, could easily turn into a spin. That’s why it is essential that correct stall recovery action is taken at the first indication of a stall. And the book spells out that first-indication recovery: forward movement of the pitch control; neutralize the roll control; and prevent wing drop with the rudder. So pitch forward, roll neutral, rudder to hold the wing. Let me tie the whole picture together. Every recovery in this excerpt shares the same core: lower the nose to un-stall, add power to minimize height loss, and use your controls to keep the wings level and the aircraft coordinated. The differences are all about the propulsion. The jet needs only aileron for wing drop. The multi-engine propeller needs rudder and aileron because of torque and slipstream. The single-engine propeller needs rudder, and it has the extra complication of turning effects and gyroscopic precession that demand you keep the ball centered — because in that aircraft, yaw at the stall is the fastest route to a spin.