An aircraft is trimmed straight and level at true air speed (TAS) of 100 m/s at

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An aircraft is trimmed straight and level at true air speed (TAS) of 100 m/s at standard sea level (SSL). Further, pull of 5 N holds the speed at 90 m/s without re-trimming at SSL (air density = 1.22 kg/m3). To fly at 3000 m altitude (air density = 0.91 kg/m3) and 120 m/s TAS without re-trimming, the aircraft needs

Options:

A . 1.95 N upward force.

B . 1.95 N downward force.

C . 1.85 N upward force.

D . 1.75 N downward force.

Answer: Option B

-NA-

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