We asked them about what changed and this is all we got:
We do not publish errata for PE handbooks. Major revisions are indicated by a change in the first number; a small number of technical and editorial changes are indicated by a change in the second number; and a small number of minor...
This post is regarding new material only. We haven't checked if they fixed the typos that have been reported. If you find anything else, please add to this thread.
Section 188.8.131.52 Helical Gears is completely new. The old section 184.108.40.206 Planetary Gears is now 220.127.116.11
Section 9.1.7 "Heat...
We've added a two-part series on refrigeration, covering:
Ideal Vapor Compression Cycle,. Multi-Stage Vapor Compression and the Ideal Gas Refrigeration Cycles.
Access them for free here: https://www.slaythepe.com/coaching-plan-members.html
We just uploaded a 3-part series on Entropy, Entropy Balances, Isentropic Processes and Isentropic Efficiency, as well as a tutorial on the Mollier and P-h Diagrams.