With all due respect let me offer these thoughts...
I will make this in 2 or 3 parts so it will go through the 'system' ok..
If I only have 75lbs/min of air and the proper amount of fuel to burn it
effectively at a given manifold pressure and temperature and I use water
injection to cool the air I still have 75 lbs of air plus the water as this has
to occupy some space in the system.
Or I could have 99 lbs/min of air that is at the correct temperature
already and the same pressure without the water in there how does this
end up in equal amounts of power generated??? In this second case the
volume used for the heat extraction is external to the engines air
supply and takes up no space and does not substitute water vapor for
air or fuel.
As a general rule of thumb 10 lbs/min air makes 100 hp. First case 750
hp second case 990. I fail to become a believer.
The water injection helps on a non inter cooled engine or one that the
inter cooler was sized wrong and the air temps are still too high. It
does not replace a properly designed inter cooler ever. For a car
manufacturer to look into only means they are transferring the cost
and effort to the consumer. Now the consumer has to keep the water
tank full and the manufacturer does not have to supply the inter
cooler and related plumbing or install it either. Those cases all seem
to end up about money and not performance. Early aircraft stuff was
generally a 'patch' or the related aero issues were a problem as
well. Where would you hang it when it was not designed in from the
start?
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