Why are the lines on some centre of gravity moment envelope graphs not straight?

For example the Cessna 152 and 172, the graphs look like this:CofG Moment Envelopt C172

I can't find a good quality C152 graph but the left diagonal line appears to have a curve in it.

  1. Why is there not a straight line from the minimum to maximum weight for the minimum moment?
  2. How are these lines calculated?
  3. Why is the C152 line a curve when the C172 line is two straight segments?
  • $\begingroup$ Please look here and here if those answer already are enough to answer your question. Edit your question if there is anything left unclear so we can write a better answer. $\endgroup$ – Peter Kämpf May 18 '19 at 11:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.