Originally Posted by gurucube
even when asked 'Are you happy to depart immediately behind a 757?'!!! (And the Dashes Im thinking of quite often go from intermediate holds too!).
MATS Pt 1 section 2 chapter 1 page 9 13.9:
"The pilot of a departing aircraft may request a delay in take-off because of the danger of vortex wake from the preceeding aircraft. There is particular danger for aircraft comencing the take-off run part of the way along the runway"
we've all learned the hard way about this one and it's been covered many many many times before. At the end of the day the safest option for planning purposes is to ask anything going begind a 757 is:
"ARE YOU HAPPY TO ACCEPT 1 MINUTE BEHIND THE 757."
If the answer is yes, then you can line them up or clear them for an immediate take off. If no then adjust the departure plan accordingly and ask for a gap elsewhere should it be required.
Our job and the job of the pilots is all about SAFETY, if you or the pilot doesn't think it's safe then it just isn't done.
And yes i work in a very mixed traffic environment with lots of 757 followed by S/M traffic.