The Fairchild-Republic A-10 Thunderbolt II(‘Warthog’). This single-seat close ai

Question

The Fairchild-Republic A-10 Thunderbolt II(‘Warthog’). This single-seat close air supportaircraft is entirely designed around a seven-barrel 30mm GAU-8/AAvenger Gatling gun capable of firing 4200 1.8lb rounds (bullets)per minute with a muzzle velocity of approximately 3500 ft/sto engage armored targets, especially tanks, at distancesapproaching two miles. Due to the enormous recoil of this gun,pilots typically fire the cannon in 2.00s bursts. Using SI units,calculate the engine thrust necessary to maintain constant airspeedduring the interval when the cannon is fired. Assume the plane isin level flight and that 60% of the mass of each round is theprojectile.

Explanation / Answer

use conservation of momentum. total massfired*muzzle velocity = thrust*time

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