Originally Posted by
Quietplease
All water injection did for a BAC1-11 was make it noisier. No discernible effect on performance.
IIRC the water injection gave another 500lbs of thrust below 25C and restored thrust when hotter up to about 40C.
Used on most take offs in Oman.
I remember going out of Tehran in 1979, (me on jumpseat), the water ran out as we hit the inversion layer. The aircraft stopped climbing until we got a good distance from the city. The Captain wrote in the F700, (tech log), Max Continuous Thrust used for 17 mins. The answer "Noted with thanks".