I'm trying to write a paper (10 pages minimum) on water in the atmosphere and how it relates to aviation for my ATMS 315 (Aviation Meteorology) class. Do any of you know where I might find concrete numbers regarding the effects of humidity on aircraft performance. Type specific performance numbers would work, as would general guidelines (i.e. xx% decrease in thrust for every yy% increase in relative humidity). If any of you know of a site where I can find this, can quote from a performance manual or book, or just know the answer, please help me out. If you just know off the top of your head, please also leave a title (i.e. 767 captain, etc.) so that I can quote you as a reputable source in the paper. I appreciate any help that y'all can provide. Thanks in advance.