Originally Posted by
Anilv
Last encountered them when I did a loadsheet course for SAA around the late 80s I think. It was explained that there was big tank which would be emptied during the take off. Tank was in the wingbox area as had an open top as a closed tank would not allow the pumps to flow as fast. I seem to remember the figure of 3000kgs added if water injection was used but it was a long time ago.
Anilv
From an aged memory at SAA in the 70s the B707B/C was 334000 lbs dry, 336000 lbs wet max take off so 2000 lbs water? Good for about 2 mins