Re: Old 707's

Date:         26 Dec 97 03:28:47 
From:         "Robert J. Carpenter" <>
Organization: Erol's Internet Services
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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.

If I remember correctly, the Viscount used water (and methanol)
injection in its turboprop engines for takeoff.  Perhaps the methanol
was for antifreeze??

	Bob Carpenter