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What is the range of an order of angular rate magnitude that gyros used in military planes need?

(a) 8

(b) 8.5

(c) 7.1

(d) 3

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This question is from Gyroscopes in portion Satellite Radio Navigation  & Inertial Navigation of Avionics

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The correct answer is (b) 8.5

To explain I would say: A gyroscope on a military aircraft must sense angular rates as low as 0.005 deg/hr and as high as 400deg/sec, a range of 8.5 orders of magnitude. Strapdown gyros in civil aircraft need only sense an 8 order of magnitude range of angular rates.

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