SierraTango501
SierraTango501 t1_iuemfdr wrote
Reply to comment by WW-Sckitzo in ELI5: Morse code is made up of dots and dashes. How did telegraph operators keep from losing track of where one letter ended and another began? by copperdomebodhi
Aviation still uses morse heavily in ground based navigation (VOR/NDB) identifiers.
SierraTango501 t1_j698u6k wrote
Reply to comment by CBMet in ELI5: What is the difference between turbojet, ramjet, and scramjet? by Global_Maize_8944
Also, ramjets and scramjets don't work at the speeds that commercial airliners fly at, and turbojets are hugely fuel inefficient.
The engines powering commercial airliners are turbofans, similar in construction to a turbojet, but with a large diameter intake fan, that bypasses a lot of cold air past the compression/ignition stage and mixes it with the exhaust air to generate thrust without burning up a ton of fuel a minute.