ICAO Noise Abatement Procedure
+ Takeoff Power and flap climbing at V2 plus to 800' AFE
+ Set Climb power at 800'
+ Constant speed climb to 1500' AFE
+ At 1500' reduce pitch , Accelerate and retract flaps on schedule
+ Constant Speed climb to 3000' AFE
+ At 3000' accelerate to 250 kts
+ constant speed climb to 10000' AFE
Above is an ICAO defined climb profile for noise abatement procedure for A320 aircraft.
Why flaps are retracted only at 1500' AFE ( Above Field Elevation) ?, If this profile is to be followed for a noise abatement , then pilots need a Higher Angle or gradient of climb , which will get reduced due to reduction in excess thrust supplied by config 1+F or Config 2 , so why this profile is not suggesting an early retraction of flap in sequence after reaching V2 speed plus or 500' AGL (which is standard) to get a higher gradient or Angle of climb ?