From: firstname.lastname@example.org (MikeM727) Organization: America Online, Inc. (1-800-827-6364) Date: 17 Sep 96 02:24:42 References: 1 2 Followups: 1 2
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In article <airliners.1996.1875@ohare.Chicago.COM>, GWilson404@aol.com writes: >Delta is sometimes used to mean the ratio of either ambient or engine face >total pressure to sea level static standard pressure, 1013.25mb or >14.69psia. At constant temperature the thrust of a jet engine is directly >proportional to this value , which therefore has to be taken into account >in field performance calculations. This sounds to me more like a description of EPR, Engine Pressure Ratio. I've never heard EPR referred to as "Delta". Of course the term "delta" can be used to mean any differential.