The 'Twin-Beam' Mirror (TBM) achieves two-component fusion by injection of a high-energy (∼ 300 keV) beam into a mirror-confined target plasma created by a lower-energy (< 100 keV) beam. The present study considers high-energy injection at various angles to the magnetic field as a way to increase the fusion neutron flux (at the expense of energy multiplication) for applications such as a fusion-fission hybrid or materials test facility. The rapid decrease in Q with smaller injection angle, however, appears to place a practical limit of ∼ 7% on the gain in flux in a TBM with 50° injection.