  We discuss two mechanical systems with hyperbolic chaotic attractors of Smale
- Williams type. Both models are based on Froude pendulums. The first system is
composed of two coupled Froude pendulums with alternating periodic braking. The
second system is Froude pendulum with time-delayed feedback and periodic
braking. We demonstrate by means of numerical simulations that proposed models
have chaotic attractors of Smale - Williams type. We specify regions of
parameter values at which the dynamics corresponds to Smale - Williams
solenoid. We check numerically hyperbolicity of the attractors.
