Question: ( 2 0 points ) An airplane that weighs 1 2 , 0 0 0 N cruises in level flight at 1 8 0 k

(20 points) An airplane that weighs 12,000N cruises in level flight at
180kms at altitude of 15 km . The wing surface area is 10m2, and with
aspect ratio of 8.
(a). Find the average chord length c .
(b). Find the Reynolds number and Mach number. (Use the chord length c as
the characteristic length). Please write each step clearly
( 2 0 points ) An airplane that weighs 1 2 , 0 0

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