Figure 1.14a,b. Parameters that define particle kinematics and impact accuracy in the
VK-1 device: a – components of impact velocity v0, circular velocity v1 and free falling
velocity v2; b – parameters that influence impact accuracy of all particles, H – particle
free falling distance, h – height of the specimen, α – impact angle, ω – angular velocity of
the rotor, R – distance of the specimen from the axis of rotation