I would have attached this little program that I keep on my desk top, but it was to big for the server. Convert, it is useful in a lot of ways, you can even customize calculations if you want. You can down load it from here. http://joshmadison.com/software/convert/ Its free
-------------- Original message from "George Lendich" <lendich@optusnet.com.au>: --------------
Ed,
Understanding your concerns, I have searched the net and confirmed that 1HP = 746 Watts and 1Btu= 0.293 watts, therefore 746/0.293 =2546 btu/hr=1hp.
2546/60 = 42.43 ( 3 recurring).btu/min.
Same site gave 42.44 btu/min.
So the 42.5 is my rule of thumb, but anyone can use it if they want.
So your 5,000 Btu's ( water only) for 175hp must have been fairly accurate( good memory).
I wanted to know Btu's per min/per Hp, as I assume that Radiator suppliers/ manufacturers need that info to confirm sizes of cores etc.
On another tack there is a rule of thumb that the first 1/2 of the Rad does 3/4 of the cooling - is there some truth to that claim?
George (down under)