No idea if this is true, but I was told that the TAC as originally designed was so good that there was no noticeable yaw after an engine failure. During initial certification the TAC had to be "de-tuned" to allow some yaw in order to: a) make it obvious an engine had failed, and b) allow easier identification of the failed engine.
As I said, that's what I was told...
Last edited by BuzzBox; 19th April 2006 at 08:17.