  A search for high-mass resonances decaying to $\tau\nu$ using proton-proton
collisions at $\sqrt{s}$ = 13 TeV produced by the Large Hadron Collider is
presented. Only $\tau$-lepton decays with hadrons in the final state are
considered. The data were recorded with the ATLAS detector and correspond to an
integrated luminosity of 36.1 fb$^{-1}$. No statistically significant excess
above the Standard Model expectation is observed; model-independent upper
limits are set on the visible $\tau\nu$ production cross section. Heavy
$W^{\prime}$ bosons with masses less than 3.7 TeV in the Sequential Standard
Model and masses less than 2.2-3.8 TeV depending on the coupling in the
non-universal G(221) model are excluded at the 95% credibility level.
