Originally Posted by
mad fridgie
Not sure what you mean about your horn, (means something different in my terms)
But i think to answer your question.
look at P-H diagram, you will see some lines marked "s"
So at your comp inlet point SST, follow the "s" line until it insects your discharge pressure (SCT)
Now at this point see how the "s" line intersects the Temperature curves. This will give the you the theoretical discharge temp and remove the SCT from this number to give actual amount of discharge superheat. But you then to include efficiency, which then alters the figure.