@DanHulme @TomMcW the reverse thrust is not 100%, most of it is sideways, I don't know how much is it, and on
airliners.net it's also debatable, but from the same source as my answer from an illustrative graph, is looks like it's about 50%, which should be within the rudder / NWS authority below Vmcg -- of course RTOs happen for reasons other than engine failure, but I took it a step further and checked the A320's FCTM, during...