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    I Question about making a coaxial magnetic field in a pipe

    Hi, for a particular project, I would like to create a 1~2 Tesla magnetic field in a stainless steel pipe along the z axis. I was wondering if my concept would work, or if anyone had better ideas. Here's my concept. Fig1. So I got a few pipes about 1 inch in diameter. I would like to have a...
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    Vertical lift aircraft fuel longevity

    Anyone know how long a typical lets say news helicopter can last in the air given how much fuel it holds? I am not sure but I heard a news helicopter or a police helicopter probably wont last more than 3 hours in the air. Some military transport helicopters can only do about 2 and attack...