On May 6, 9:40 am, WingFlaps wrote:

Dan, you keep trying to pick up the wrong end of the stick.
I'm not talking about certification. For example, in the FARs does it
describe how the stabilator chord changes with trim positions?
Certification results from practical demonstrations of plane handling
and flying not theoretical aeronautical discussions -or is that not
so?

The FARs don't care how the chord changes. They don't care
how the engineer achieves the flying qualities and strength they
demand for certification. They just set certain parameters that must
be met, and the engineers design an airplane that complies with those
parameters.
If the trim tab damaged the effectiveness of the elevator so
that the control surface stalled, or lost authority to the point that
the parameters could not be met, certification would not take place.
Period. Your arguments are specious.
Neither the FAA nor any foreign national governing body is
going to get into the minutiae of design specifics. There's no time
and no need. Or did you want to pay more taxes and user fees and a
higher price to buy or rent an airplane, just to achieve through
endless detail what is already achieved through mandated performance
and strength limits?

Dan