[ولد قطر]

SAFT aircraft battery CMM´s can be found here:
https://www.saftbatteries.com/020-MS_...-40-21_cmm.asp

https://www.efunda.com/home.cfm

General engineer reference site.

https://www.wingfiles.com/#Systems

Mostly pilot stuff but a few interesting items for us.

https://www.grc.nasa.gov/WWW/K-12/airplane/short.html

Very good NASA website, basic aerodynamics & lots of other good gen, maths, physics & the atmosphere etc.

https://www.auf.asn.au/groundschool/contents.html

Theory of flight.

https://avstop.com/maint/corrosion/index.html

Corrosion.

https://www.trimble.com/gps/index.shtml

Trimble GPS guide.

https://www.honeywell.com/sites/aero/Egpws-Home.htm

EGPWS.