Quote:
Originally Posted by LeRoySmith
Those are called Sling Psychrometers. The original kind are pretty expensive (I think in the neighborhood of $150) but you can get cheap digital ones that work pretty well for $25. If you get one spend a little extra and get a psychometric chart (and instructional book). You will learn all you ever care to know about water content of air and how it behaves in concert with temperature.
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I couldn’t remember name, thanks.
Those was used on dinosaur jet engine’s mainly P&W J57s TF33s. Been 35 years plus since I ran jet engine on trim pad or test cell.