Originally Posted by
flynaz32
Started by stating we are doing a flight out of CVG. Taxi to runway 27 and then the runway becomes unusable because of disabled aircraft on runway, now you are cleared to, and will depart 08, what things do you need to do, keep in mind for departing different runway. Asked if V1 or Vr would change, no, because they are weight dependent. ...
This is not correct. They can change, and change a great deal. Wind, runway slope and close in obstructions can all result in speed and thrust changes.
The later two are also why parallel runways of equal length can have different data/speeds.