Date: 26 Dec 97 03:28:50 From: email@example.com (Brad Hunnewell) Organization: EarthLink Network, Inc. References: 1 2 3 4 5 6
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On 21 Dec 97 17:01:28 , hackettNO*SPAM@southwind.net (Kim Hackett) wrote: >The early 707s, the KC-135A with J57 engines, and the B-52G use water >injection for additional takeoff thrust. The B-52G has a water tank in >the fuselage forward of the wing. The water injection lasts about 45 >seconds. Not all takeoffs use water injection. On takeoffs with water >injection, all of the water must be used, otherwise it would freeze at >altitude. I think the water capacity on the B-52G is about 3000 lb, if >I remember correctly. I used to fly KC-135A's (until just about 2 years ago). We carried about 6000# of water which "burned" for about 2 minutes, or if we turned it off before that, we drained the rest. Of course, water doesn't actually burn, it would increase the density of the through-put air mass, which increased the thrust from (I'm stretching my memory here) about 12000# to 16000# per engine. It put out a huge black smoke trail and was loud as hell, but all-in-all, pretty cool to watch, especially a 10-ship takeoff with 12 seconds between aircraft!