Editing Auxiliary power unit (section)

====Power section====
The power section is the gas-generator portion of the engine and produces all the shaft power for the APU.<ref name="aertecsolutions.com">{{Cite web|url=http://www.aertecsolutions.com/2015/05/11/the-apu-and-its-benefits/?lang=en|title=The APU and its benefits {{!}} AERTEC Solutions|website=www.aertecsolutions.com|date=10 May 2015 |language=en-US|access-date=2018-06-20|archive-date=2018-06-20|archive-url=https://web.archive.org/web/20180620124922/http://www.aertecsolutions.com/2015/05/11/the-apu-and-its-benefits/?lang=en}}</ref> In this section of the engine, air and fuel are mixed, compressed and ignited to create hot and expanding gases. This gas is highly energetic and is used to spin the turbine, which in turn powers other sections of the engine, such as auxiliary gearboxes, pumps, electrical generators, and in the case of a turbo fan engine, the main fan.<ref>{{Cite web |title=Turbojet Engines |url=https://www.grc.nasa.gov/www/K-12/airplane/aturbj.html |access-date=2022-03-20 |website=www.grc.nasa.gov}}</ref>