My luck with KC-46s and bad weather broke recently with a Pegasus launching out of Boeing Field on a glorious day.  It was carrying out trials work with a US Navy Hornet.  This jet was the subject of its own post.  The KC-46 followed it down the runway.  It rotated in a good location and the light was so much nicer than I have had recently so I was very happy to get shots of it as it climbed out and headed off to the airspace set aside for testing.