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Practical Stability

Gemini Sparkle

Key Takeaways:

  • The author experienced significant difficulty flying his Cherokee Six with an aft Center of Gravity (CG), even when within legal limits, due to a noticeable reduction in the aircraft's stability.
  • Aircraft stability (static and dynamic) is crucial for an airplane to return to equilibrium after disturbances; an aft CG diminishes this stability by reducing the effectiveness of control surfaces in generating the necessary corrective torque.
  • While an aft CG might offer minor speed advantages, this comes at the cost of increased pilot workload and reduced ability for the aircraft to self-correct, highlighting the critical importance of proper loading for easier and safer flight.
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My family loved the Cherokee Six I used to fly. My daughter, the one most interested in aviation, sat up front with me, helping with radios and charts. My son, whose stomach was the most sensitive, sat in the middle row, near the center of gravity (CG), where turbulence had the least effect. My wife sat in the last row and watched a movie.

Its useful load was large enough to carry a light sport airplane, although the logistics would have been difficult. Big piles of hand-me-downs for the nieces? Load ‘em up! It was difficult to get it out of the published CG envelope.

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