Sternone
>Why is that ? In a real partial loss (and you know that) it isn't THAT easy to feel what side has failled...the plane just goes from left to right... <
The old dead leg dead engine works well as well as having the ball centre as an early indication. Make sure you disconnect the yaw damper.
then of course check the engine indications!
Its not rocket science but simple piloting skills. From what you are saying many twin pilots are lacking!!! but then that has to be training, currency, or pure panic if you loose it.
Pace