Yanking And Banking

I watched a demonstration by the pilot of a U.S. Air Force F-22 Raptor on one of the nicer weather-days at this years Sun n Fun International Fly-In and Expo (the day before the tornado hit). The Raptors most unique characteristic-from an observers standpoint and in addition to its efficient conversation of fuel into noise-is its ability to maneuver at extremely high angles of attack-maintaining a constant AoA of over 60 deg. in sustained flight. Watch an F-22-or any other high-performance aircraft-maneuver, however, and you may notice an interesting pattern. Any time the fighter changes attitude under a G-load, the pilot does so incrementally. He or she changes pitch, then changes bank, or the pilot changes bank and then changes pitch. You never see a radical pitch and bank change simultaneously.

Key Takeaways:

• "Rolling Gs," which occur when an aircraft simultaneously changes bank angle and G-load, create uneven and potentially damaging twisting forces on the airframe.
• Expert pilots and aviation regulations emphasize avoiding simultaneous radical pitch and bank changes, with unsymmetrical flight having significantly lower G-limits than symmetrical flight.
• An NTSB accident report highlights the risk, where a pilot likely damaged an aircraft by pulling up aggressively while still rolling out of a steep bank, demonstrating the real-world consequences of rolling Gs.
• FAA training maneuvers like lazy eights and chandelles are designed to teach pilots to make sequential, rather than simultaneous, changes in pitch and bank to prevent the structural stress caused by rolling Gs.

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