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#19
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![]() Michael wrote: Then you really didn't understand the physics of how a pitot tube works. Think of a pitot tube as an energy conversion device. There is energy in moving air. There is energy in pressurized air. A pitot tube is a device for converting the former into the latter. An ASI is actually a pressure gauge (usually a brass bellows that drives the needle) that measures the difference between the ram pressure and the static pressure. The ram pressure is always going to be higher, because the speed of the airplane is forcing air in, and pressurizing it. I understood that. I just way over estimated how much air went through the pitot tube. Any tube that has a hole in the front and a smaller hole in the back would do the job. The net pressure to the A/S indicator would be less but that's just a calibration issue. So I understood the concept but over estimated the flow. -Robert |
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