Glossary
What is Part 141 flight training?
Training at a school that holds an FAA-approved training course outline, which it must teach in sequence and which the FAA inspects. The structure suits full-time and career-track students, and an approved course can require fewer total flight hours than the same certificate earned outside one.
That is the whole entry for now. The longer version, with the mechanics and worked examples, is still to be written. See autorotation for how those read once they exist.