  We use numerical simulations to measure the sensitivity of the tidal spin
down rate of a homogeneous triaxial ellipsoid to its axis ratios by comparing
the drift rate in orbital semi-major axis to that of a spherical body with the
same mass, volume and simulated rheology. We use a mass-spring model
approximating a viscoelastic body spinning around its shortest body axis, with
spin aligned with orbital spin axis, and in circular orbit about a point mass.
The torque or drift rate can be estimated from that predicted for a sphere with
equivalent volume if multiplied by $0.5 (1 + b^4/a^4)(b/a)^{-4/3}
(c/a)^{-\alpha_c}$ where $b/a$ and $c/a$ are the body axis ratios and index
$\alpha_c \approx 1.05$ is consistent with the random lattice mass spring model
simulations but $\alpha_c = 4/3$ suggested by scaling estimates.
  A homogeneous body with axis ratios 0.5 and and 0.8, like Haumea, has orbital
semi-major axis drift rate about twice as fast as a spherical body with the
same mass, volume and material properties. A simulation approximating a mostly
rocky body but with 20\% of its mass as ice concentrated at its ends has a
drift rate 10 times faster than the equivalent homogeneous rocky sphere.
However, this increase in drift rate is not enough to allow Haumea's satellite,
Hi'iaka, to have tidally drifted away from Haumea to its current orbital
semi-major axis.
