Discussion
The airspeed indicator responds to the difference between total and __________ pressure.
Answer: D
Correct answer: static
The airspeed indicator works on the difference between total pressure from the pitot tube and static pressure from the flush ports, and that difference is the dynamic pressure. Note that dynamic pressure is the output of the subtraction rather than one of its inputs - which is why no probe senses it directly and why the instrument needs both sources to function.
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