: I never quite understood why injecting water into engine will increase
: its performance. I have no doubt it's true that Boeing used to do that
: on their jet engines. Anyone here can provide a scientific answer?

As others have said, it's not that the water increases its performance.
Rather, it's that the water allows operation under conditions that would otherwise
destroy the engine (in particular, lots of turbo/supercharge boost). It's analogous
to higher octane fuel. Higher octane fuel does not increase performance. Rather, it
allows the engine to be tuned to a higher compression ratio without destroying itself
from detonation. The higher CR is what increases performance.

-Cory

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* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
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