Question

A gun barrel weight 300 kg and has a recoil spring of stiffness 250N/mm. The barrel recoils 0.8m on firing. Determine the (i) Critical recoil velocity of the gun, (ii) Critical damping coefficient of the dashpot engaged at the end of the recoil stroke.

Answer 1

i)

$V^2 = \frac{250\times10\times0.64}{3}$

$V = 23.094$ ms^-1

ii) Ec = 17320.508Nm/s