Without knowing the tonal intensity you cannot say with a lot of certainty how the effect applies over a range of intensities but I would hazard a guess Ortmann would have chosen one mid-range, say mf. In that case it doesn't take a great mind to work out quieter and a greater gap than 3/50ths, louder a smaller gap than 3/50ths. It all then makes perfect sense. Just keep trashing my thread why don't you! The OP is about ligaments!?
Great let's take random guesses at the dynamic intensity- purely the for sake of applying your meaningless calculation to something specific. Now would you like to incorporated the other variables?
The elasticity of a particular pianist's joint
Which finger is playing
The position from which the finger begins
The pianist's range of motion
The length of the pianist's fingertip
Every single one of these factors makes a mockery of the idea of ascribing a specific duration to collapse (even if we make the bizarre assumption that every note is to be played mf). It is the fact that collapse is so VARIABLE that makes it so problematic. It takes as long as it takes in a given circumstance. Trying to quantify it to a figure is like asking how long a piece of string is. Ortmann only measured one piece.
I have not trashed your thread. You have trashed it by attributing your own nonsense to Ortmann and refusing to hold your hand up to the fact- regardless of the troubles I have taken to illustrate your irrefutable gaffe. Had you appreciated what ortmann actually stated, without adding your own unwarranted inferences, this would have been resolved in just 2 or 3 posts. I only intended to make a passing point. Had you listened to it and corrected your error, we would have been done.
Also, appreciation of the variability of collapse is central to understanding why it is problematic. You might have your fingers in your ears, and but were you to take them out, you'd realise that to assume that collapse takes a predictable amount of time is to grossly misunderstand a central issue. The very problem is you CANNOT predict how collapse effects the key speed-hence the effect it has on control. Your error relates to a most significant issue.