Anti-ice,. .you state: "very high-full power settings/climb rates are used (unnecessarily) costing a huge amount of money.......or excessive pollution ?"
I don't agree for excessive pollution. The best fuel economy departure is full thrust, min flap, clean up ASAP (1000AGL) and max ROC speed at full climb thrust. Any flex settings will increase fuel burn..... and more pollution.
I fly B757 and our SOP are flex departure with flap 15/20 at V2+15..+25 up to 3000 AGL(noise procedure for all departure) and climb-2 thrust is selected at 1500AGL.. .In my view this SOP has a poor energy management (thrust reduction 1500 feet before clean up and Hi-drag reduced-thrust configuration up to 3000AGL!). . .The predicted plog fuel burn during the climb is based on a full thrust settings and 1000 AGL flap accelleration,.....we always burn 200-300 Kg extra fuel fuel during the climb!!! and they want us to go with minimum fuel.......NO
Keep it safe. .stardust
[ 05 February 2002: Message edited by: stardust ]</p>