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The three competing supersonic designs are discussed in this video – The Forgotten American Concordes. Two competing designs from the USA were proposed to the US government, which was going to fund 75% of the development cost: one from Lockheed, and the B2707 from Boeing which was the winning design. The B2707 was meant to be bigger and faster than Concorde,...


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The 2707 started with a variable sweep, but it was too heavy to be feasible Here's a mockup of the 2707 with its variable sweep And here's a video of Boeing's mockup But variable sweep mechanisms add a lot of weight. And, being a civilian airliner, there would likely have to be all sorts of safety backups, adding more ...


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Airlines try to maintain some ratio of crews to fleet to provide surplus bodies to cope with this sort of thing. For Regionals, where the average aircraft hours are around 2500 hrs per year, and each pilot flies somewhere around 800-1000 hrs per year, you need 3 crews per a/c just to meet the baseline operational need. Add absentee time for vacation ...


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It certainly would have worked, as there weren't really any technical obstacles, only financial. The real issue is, was it possible to build it and put it into service with un-subsidized ticket prices that would fill seats AND make it possible to make a profit on its operation? It's important to note that the Concorde was only feasible because British and ...


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Tail engines add more weight. Placing the engines in pods underneath the wing relieves the bending moment in flight, allowing for lighter wing root construction. Placing them at the tail requires local beefy frame construction. Note that the upwards bending moment in flight is the limit design factor: In flight all of the weight of the aeroplane times the ...


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Quite rare. An approach abort that results in touchdown is called a "balked landing" and generally happens when you've started the landing transition, reducing power and starting the flare, where you are in a "low energy state" (speed decelerating below Vref and engines going to idle) at the time you make the go-around decision. It's considered a high(er)...


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The effect of dihedral on lift can be obtained applying high school trigonometry: $$ L=L_0 \, cos \,\theta $$ where $L_0$ is the lift of the original flat wing and $\theta$ is the dihedral angle. This holds true for negative values of $\theta$ as well. Since the cosine can be approximated by unity for small angles, the net effect is negligible in most ...


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I know the airplane was re-designed during development due to weight and complexity issues associated with the swing wing design. Variable geometry was the rage in the sixties and Boeing felt that, from initial studies of the problem, that is could make use of the swing wing design for improved low speed flight. It turned out that even with a titanium wing ...


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