As somebody said, why not have all the protections on every braked wheel?
I wonder if it is because when the 73 was designed, such systems were very complicated and expensive, and/or perhaps they could only apply one function to each wheel, so they applied each different function to only half the wheels?
(I vaguely remember being taught about purely mechanical Anti skid systems on some early (British?) aircraft - the word 'Maxaret' is floating around the corners of my brain - but can't remember which aircraft makes).
Nowadays, with year on year improvements and reducing cost of electronics, every braked wheel can be protected against locking up.
Last edited by Uplinker; 27th Jan 2017 at 08:53.