Telling tower about a very long takeoff roll?
This might seem a silly idea, but certain control towers in the uS are under strong pressure to mix so much arrival/departure traffic, that it would help them to realize that a DC-9 40 or 50 series using a 5 degree flap setting can result in using most of the runway. The problem with trying to advise them is that first of all, I can't remember other pilots mentioning this on tower freq and trying to advise tower can result in a blocked transmission.
Do any Tower Controllers see this info as a benefit with heavy arrival traffic to both runways (i.e. MSP ), or is not worth the risk of a blocked transmission?