Swimming speed of a Brinkman sheet ($U=\frac{1}{2}{b}^{2}k\omega \sqrt{1+(\alpha /k{)}^2}$)

The leading fixed-stroke speed of a transverse Brinkman swimming sheet is enhanced over the pure-fluid value by $\sqrt{1+(\alpha /k{)}^2}$. It follows from the mean displaced-boundary velocity and zero mean traction. The expansion is at fixed screening parameter and does not assert an enhancement at fixed available motor power.