Register

Technicalities: Glimpsed in Passing

Regardless of the number and
arrangement of horizontal surfaces, putting
the CG ahead of their collective centroid
makes the airplane longitudinally stable.
Piaggio Aero
Gemini Sparkle

Key Takeaways:

  • The article begins with the author's philosophical reflections on perspective gained from flying and the unexpected experience of seeing himself on Google Street View, prompting musings on existence and improbable events.
  • It transitions to a detailed explanation of aircraft weight and balance, emphasizing the critical role of Center of Gravity (CG) limits as mandated by regulations like FAR Part 25/23 for safe operation.
  • The author elucidates how CG limits are determined by aerodynamic factors, including tail size, the relationship between CG and the aerodynamic center, and landing gear placement, impacting both forward (control/rotation) and aft (longitudinal stability) limits.
  • Ultimately, the piece stresses that despite intricate aircraft design considerations for stability, adherence by pilots to proper weight and balance procedures remains paramount for flight safety.
See a mistake? Contact us.

Contempt and awe seldom wed, but height may make a match between them. One of the intermittent rewards of flying is the thought-provoking perspective it provides: We look down upon great cities reduced to anonymous gray smudges, or the lights of a solitary car speeding alone at midnight across a canvas of black velvet. The latter makes us reflect upon the unimagined lives of strangers — where is she going? what is he thinking about? — and the former upon the unimaginable multiplicity of such lives, each one a world, and yet each also a brief vestige upon the face of the land. Size had better not matter.

It was therefore with emotion that I learned, from my next-door neighbor, that I was to be seen on the Google “street view” of the intersection just below our houses. I looked, and indeed there I was. My face, along with a couple of license plates, was blurred from fear of lawyers, but my body, returning from the espresso joint down the street, coffee in right hand, newspapers under left arm, had been caught in a fortuitous space-time intersection with the Google camera-car, which, in spite of its resembling a rolling planetarium, I had entirely failed to notice.

Peter Garrison

Peter Garrison taught himself to use a slide rule and tin snips, built an airplane in his backyard, and flew it to Japan. He began contributing to FLYING in 1968, and he continues to share his columns, ""Technicalities"" and ""Aftermath,"" with FLYING readers.

Ready to Sell Your Aircraft?

List your airplane on AircraftForSale.com and reach qualified buyers.

List Your Aircraft
AircraftForSale Logo | FLYING Logo
Pilot in aircraft
Sign-up for newsletters & special offers!

Get the latest stories & special offers delivered directly to your inbox.

SUBSCRIBE