Orbital Dynamics ofHe3-A

We present a phenomenological theory, valid for $\hslash \omega \ll \Delta \mathrm{}\left(T\right)\mathrm{}$, which incorporates the ideas of Cross on normal-superfluid locking but uses quite different kinematics. Our results agree with his in the "overdamped" region, while we also predict a low-temperature "flapping" mode, orbital effects on the NMR, and a linear orbit-wave spectrum at $T=0\mathrm{}$.