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The biggest jet engines ever seen are set to roar on Boeing’s 777X
- benj111 8y agoThis is bigger but less powerful than its predecessor. Is it a higher bypass engine, sort of like a turbo prop hybrid type thing? What's the limiting factor re size? This seems an obvious thing to do to increase efficiency?
- ggcdn 8y agoI'm a structural engineer, so when I see forces I like to compare them to common forces I design for in buildings. That engine produces 115,000 lb of thrust. If I take typical rebar, fy=60ksi, so I will need about 1.916in2, which is about 2 #9 bars. Two engines per plane, so I could hold back the 777 at full power with 4 #9 rebars. Not bad!
- pohl 8y agoThe article says 105,000lb.
- ggcdn 8y agoYou're right, it was the GE-90 that produced 115k. Rest assured, however, that the quantity of #9 rebars remains unchanged.
- Stryder 8y agoThat's pretty cool!
- thatoneuser 8y agoSo if you secured 4 of these rebar perpendicular to the direction of the plane and tied a strong rope from plane to rebar, the result would be the plane couldn’t move and the rebar wouldn’t break or bend?
- ggcdn 8y agoNo, I assumed the rebar is orientated as the 'strong rope'. If the rebar were positioned as you say, they would yield/bend quite easily.
- velco 8y agoRocket engines aren't considered jet engines ???
- HeyLaughingBoy 8y agoNope. Jets use external oxygen; rockets carry or make their own oxygen.
- burfog 8y agoRockets are jets. The name "Jet Propulsion Laboratory" dates to 1943. They do rockets. At least 2 years prior to that name change they had worked on JATO, which is "jet-assisted takeoff". The company Aerojet was founded in 1942, making solid-fuel rockets.
- delinka 8y agoau contraire https://en.wikipedia.org/wiki/Jet_engine#Other_types_of_jet_propulsion https://en.wikipedia.org/wiki/Jet_engine#Other_types_of_jet_...
- woodandsteel 8y agoLike many terms in the English language, the word "jet" has more than one meaning. In the context of flight above the surface of the Earth, it refers to an oxygen-breathing device.