Note the NASA logo and other NASA markings.

A quote from the above publication: “ Then because of the shape of an airplane’s wing, called an airfoil, the air into which the airplane flies is split at the wing’s leading edge, passing above and below the wing at different speeds so that the air will reach the same endpoint along the trailing edge of the wing at the same time.”

I can’t find a date on it.

for those interested, here's the PDF: nasa.gov/aeroresearch/resources/mib/bernoulli-principle-k-4

@TomMcW scratch what I said

I read a different passage directly from the PDF

then saw your quote

@TomMcW wait, here's the quote from the PDF:

> Then because of the shape of an airplane’s wing, called an airfoil, the air into which the airplane flies passes above and below the wing at different speeds. In general, the wing’s upper surface is curved so that the air rushing over the top of the wing speeds up and stretches out, which decreases the air pressure above the wing. In contrast, the air flowing below the wing moves in a straighter line, thus its speed and pressure remain about the same.

> Since high pressure always moves toward low pressure, the air below the wing pushes upward toward the air above the wing. The wing, in the middle, is then “lifted” by the force of the air perpendicular to the wing. When the force of lift is greater than the force of gravity, the airplane is able to fly, and because of thrust, the airplane is able to move forward in flight. According to Newton’s third law of motion, the action of the wings moving through the air creates lift.

no mention of meeting at "the same endpoint"

so I wasn't crazy after all lol, PDF is correct :D

So, it's been updated since

get the new copy ;)

@ymb1 Just thought it was odd that NASA would publish a theory of lift that they themselves say is incorrect.

The explanation in the pdf doesn’t explain how a flat plate produces lift.

Last call. Bounty ended, 20 hours to go.

:-)

if anyone has ideas on this aviation.stackexchange.com/questions/87119/… I'd appreciate it

I suspect the answer is to contact either the regional flight surgeon's office or the Aerospace Medical Certification Division, but I'm not sure who I need to talk to and have not been having much luck making contact