Back to that water injection, as has been stated the system operated for the first couple of minutes of takeoff and climb out. Thereafter what was left became unnecessary baggage and soon after that it became frozen baggage, a large ice lolly.
My home was a mile west of Grand Central airport which is about 5 miles northwest of Jan Smuts, thus it was we would lie on the lawn in the early evening and watched the European bound aircraft dump their excess water over our house.