When the Tower controller replied that you had 4 miles they were probably trying to re-assure you that the preceding aircraft was clear ahead, they would not be thinking that there was a Wake Turbulence issue.
The controller SHOULD be thinking 'wake turbulance' all the time!!!!!
advise the controller that you are requesting a 2 minute gap before you are airborne.
The last time I told tower I wasn't ready I was shoved off the runway and had to queue up again. Grrrrrr!!!
You mention 15 - 25 seconds to rotation....never achieved this in any turboprop I flew, and that was the Cheyenne, Metro, Saab340, F27.
Nop...never achieved this in any Turboprop I ever flew either.
...but bean-counters find it safe. And they make the laws.
Sentences like: Limits are there to be reached, not to be observed.
Yer I understand that and agree but the bean-counter is not stood next to the guy in the tower and I'm sure he doesn't want a fatal on his watch.
Seperation, either in distance or time, is a minimum not a limit.
My question still stands. Perhaps a German ATCO can tell me by what standard do they calculate take off seperation minima???? And is there any ATCO discression?