RE: always wanted to know
Nice one Learjetmech
here's another thought.
most engines run better in cold, damp air. Cold air is denser than warm, so more oxygen gets into the mix for a given volume of air = more power.
In damp conditions the fuel has a tendency to coat the water droplets . This has the effect of increasing the surface area of the fuel droplet as compared to when it is a single, solid droplet. Makes it burn faster - gives more power!
This latter characteristic was exploited in the fifties especially by Boeing with water injection into the likes of B-47s, early model B-52s and KC-135s. It was this that created the huge clouds of black smoke left on the runway at take-off.
hope this was of interest.
cheers
R