Structural Mechanics

The angle of incidence of tail to trim the wing-tail combination for a 5% static margin is (A) -1.4o (B) -0.4o (C) 0.4o (D) 1.4o Common Data for Questions 50 and 51: A thin long circular pipe of 10 mm diameter has porous walls and spins at 60 rpm about its own axis. Fluid is pumped out of the pipe such that it emerges radially relative to the pipe surface at a velocity of 1 m/s. [Neglect the effect of gravity.]