Years back I was riding jumpseat on an Eastern Air Lines DC8-61 out of the old Stapleton Field in Denver. It was a White House Press Charter and we were returning to Andrews AFB in DCA. Unbeknownst to us the press reporters had bought a lot of Coors Beer which at that time was unobtainable back east. I do mean a lot of beer cases. The DC8-61 was not a sparkling performer in high and hot conditions which applied that day. We were also tankering extra fuel for the Andrews AFB to JFK ferry which of course had been planned for. But not all that Coors.
It took 68 seconds from brake release to the mains coming off in the vicinity of the runway numbers on the far end. The climb out was not sparkling either.