In WW-II and shortly thereafter, piston powered aircraft peaked in power, performance and complexity wise. Power went up to over 4000 bhp for large multirow radial engines. Only to be defeated by the jet engine, developed by (among others) Germany's Dr. Hans von Ohain and separately in the UK by Sir Frank Whittle. Its principles are based on the "Aeolipile" of the ancient Greek scientist Hero and other great thinkers like Leonardo da Vinci and the laws of Isaac Newton.
There are a number of engine subsystems which assist in keeping the engine running. Lubrication, ignition and some even have an afterburner. Without going into great depth we will uncover how they work.
Turbine oil specifications.
Excerpt from the document:
The earliest gas turbine engines were developed using straight mineral oils but the operational requirements for low temperature starting, either on the ground or at high altitude (re-lights) led to the development of a range of straight mineral oils with viscosities far lower than those of conventional aircraft engine oil of that time.
For example, oils with viscosities between 2 mm2/s and 9 mm2/s at 100°C became standard for gas turbine engines, compared with viscosities of 20 mm2/s to 25 mm2/s at 100°C for piston engine oils.
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