The Incredible Technology Behind Jet Engines
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Published 2024-07-22
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All Comments (21)
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As an aerospace engineer who specialized in propulsion, this video is very nice. Very comprehensive way to explain in layman's terms an extemely complicated topic. A quick detail on turbofans, they are substantially quieter than a regular turbojets due to the air bypass, which is nother advantage and quite a massive on at that. Approved!
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The pace of early aircraft development is still one of the most unbelievable human achievements. To go from the the Kittyhawk to jet planes in under 40 years was insane.
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Steam power technology would be pretty cool in a video. Locomotives, steam turbines, air ejectors. Amazing what you can do with a bit of boiled water.
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I think the two World Wars that would sadly occur in the first half of the 20th century definitely acted as a catalyst to powered flight, specifically the developments made around the time of World War II, as necessity is the mother of invention. Particularly the contributions of Sir Frank Whittle, and his efforts to create the first jet engine as a major innovation in the history of aviation. Receiving a patent for his design for the turbojet engine in 1930 and then founding Power Jets LTD in 1936 to further develop his ideas. Leading to the first successful jet engines being tested in 1937 and, although disputed, still one of the first jet powered aircraft, utilizing Whittle’s Jet engine in the Gloster E.28 & E.29, with them first taking to the skies in 1941. Obviously, Germany’s efforts cannot be ignored, with the Heinkel HE 178, designed by Ernst Heinkel. With his prototype jet aircraft first flying in August on 1939. The U.S. can certainly not be ignored in terms of contributions to the field of jet powered aviation, with the Bell P-59 twin jet engine powered aircraft that took its maiden flight on October 1st 1942. Although impressive, all three of these aircraft didn’t really see much, if any action during World War II but, what followed would set off the biggest change in commercial aviation in the history of jet powered flight with the advent of massive Jet powered passenger planes, like the British built De-Havilland Comet taking its maiden flight in 1952 and the American built Boeing 707, first taking flight in 1954 and entering into commercial passenger use in 1958 with PAN-AM. De-Havilland obviously then suffered issues with the Comet, due to its design leading to the forming of stress crack in the fuselage after cycles of pressurization and depressurization, causing it to break up mid flight on multiple occasions. This then caused the British to loose their lead to Boeing, McDonnell Douglas, Lockheed etc. However, the joint venture between BAC and Aérospatiale to design and build the magnificent Concorde. Quite possibly, one of the most advanced, safest and definitely, the fastest and most beautiful (imo) commercial aircraft ever build but, despite these accolades, it was technically a financial failure. Due to legislation restricting supersonic flight over land and its one crash that was as a result of a freak accident causing a fuel leek in the left wing fuel tank when a huge piece of a blown 747 tire from the plane taking off before it, being left of the runway, was then thrown up, hitting the left wing with sufficient force to rupture the left wing fuel tank causing it to burst the plastic welds. Fuel leaked out of the left wing and into the hot jet exhaust of the two left engines, igniting it and causing a fire that consumed the plane until it finally crashed only shortly after takeoff. That combined with increased fuel prices due to the then recent breakout of war in the Middle East, was the death knell in that magnificent aircraft’s illustrious history. Now we have the duopoly of Boeing and Airbus and innovation has seemingly stagnated and as an American, it pains me to see the serious decline of the once great Boeing Company. I hope that serious innovation will soon return to the field of passenger jet aircraft design and production.
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Small correction, at 4:12 you say the 'gas wants to diffuse'. This is the wrong term. The hot gas wants to expand, not quite the same thing. Diffusion is the net movement from a region of higher concentration to a region of lower concentration, nothing to do with temperature. Keep up the good work!
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More, please! There are other channels that cover similar topics, in similar easy-to-understand ways, but I appreciate your guys' take!
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Well lets jet on then shall we?
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I've got a topic for you: the Internet! Everybody uses it but very few people knows how it works: how the "network of networks" work and what it does really mean, the various services (e-mail, the Web, FTP), what's really a VPN.... It's a vast subject, but it should also be possible to reduce it to layman's terms without wandering too much or go too deep into the intricate technicalities - just like you did in this video.
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Definitely a great format! Would love more of this
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This video provided about 75% of the information on turbine engines that we covered in my Aircraft Systems class way back in 1999, and did it in a lot less time. Lots of excellent information here, particularly for folks who aren't aviation/aerospace professionals. Well done, Simon.
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Love the new content, let’s hear about lasers and the future applications of them
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The name Frank Whittle comes to mind! Oh and Rolls Royce! 👌
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As an aspiring A&P with my powerplant written test in a week. This is a nice refresher
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One of your clips is the T-9 test cell at Dyess AFB running an f101-ge102 B-1 engine. My old test cell. I now work for RR as an SME for the BA engines, specifically Pearl 700, 15, and now 10X. As mentioned, you were a little off on diffusion, but pretty good video... Think of the diffuser as the exit of the compressor, thats where we need the HIGHEST pressure, so we avoid a surge. Surge is bad. Overall, good job. Gas Turbine Engines are VERY complex devices, so to get decent info across in 15-20 minutes is excellent.
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A video all about the engines on the sr-71 would be awesome. They are truly a marvel of jet engineering and a wonder to behold for sure
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Megaprojects usually has reasons for the thing being done or made, with failures and successes, plus budgets and maybe notable figures - i feel like this series would be difficult to really implement that without a longer format video, but its worthwhile either way
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My brother in law works on jet engines and he loves it, he's sent me some videos over the years of how complicated they are and testing etc, mental stuff.
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21:00 The X-43 refers to the entire hypersonic test vehicle, not just the engine. It was an integrated system where the airframe itself functioned as part of the scramjet engine.