Talk:Overall pressure ratio

Delete contradictory section
The lede says pressure ratio and compression ratio mean the same thing in the context of this article, ie aircraft intakes and compressors. This understanding is common in text-books and industry educational publications. The deleted section says they are not the same..... because it was copied from Compression ratio. The equivalent to this volume ratio, that would be relevant in the article, is density ratio or area ratio or specific volume ratio, if anyone thinks it's worth mentioning.Pieter1963 (talk) 21:11, 24 January 2021 (UTC)

Efficiency numbers
I find it extremely hard to believe the 58% cruise thermal efficiency claimed in this article for the best engines. The reference is just some blog post, and not a technical document. Stationary gas turbines of the size used in aircraft reach thermal efficiencies of only about 40% (https://www.ge.com/gas-power/products/gas-turbines). The best combined cycle power plants which make use of the hot exhaust of the gas turbine to power a steam turbine are a bit over 60% efficiency, but that is with the steam turbine which is obviously not on the aircraft... — Preceding unsigned comment added by 147.86.223.11 (talk) 07:00, 24 November 2021 (UTC)