Early model Boeing 707-100's used water injection with the JT3C-6 engine. Two pumps (one for left engines, one for right engines) fed demin water during takeoff for 2.5 minutes. When the water stopped, it felt as tho the power had been pulled back big-time, and in fact the thrust loss was 2,100 pounds per engine, and on a 10,600 pound/thrust engine, this was a LOT. These aircraft were affectionately known as "waterwagons". I flew these for awhile, and was pleased to move on to the B707-320 with fan engines.