Changes in the third edition of parts 1, 2, 3, 5 and 6 compared to the previous edition (from the year 2006 for parts 1, 2, 3, 6 and from the year 2003 for part 5).

Before we move on from helix angle restrictions, I want to say a few things about face contact ratio. Soon after the appearance of the first helica...

We have all gotten a harsh lesson in exactly what “essential” means from an invisible enemy that does not care about degrees or bank balances. Thos...

Seven weeks into the lockdown, we are all looking for “new content.” Even with a full cable “package” there are times when it seems there is nothin...