  A class of generalized Randall-Sundrum type II (RS) brane-world models with
Weyl fluid are confronted with the Gold supernovae data set and BBN
constraints. We consider three models with different evolutionary history of
the Weyl fluid, characterized by the parameter $\alpha$. For $\alpha=0$ the
Weyl curvature of the bulk appears as dark radiation on the brane, while for
$\alpha =2$ and 3 the brane radiates, leaving a Weyl fluid on the brane with
energy density decreasing slower than that of (dark) matter. In each case the
contribution $\Omega_d$ of the Weyl fluid represents but a few percent of the
energy content of the Universe. All models fit reasonably well the Gold2006
data. The best fit model for $\alpha =0$ is for $\Omega_d=0.04$. In order to
obey BBN constraints in this model however, the brane had to radiate at earlier
times.
