Valakian shuttle

The Valakian shuttle was a small, pre-warp vessel dispatched by the Valakians to search for a cure for their plague. It had propulsion modules located on the flanks of the hull above the wings, tapering inward towards the rear.
 * The ship resembled a 20th century Earth spaceshuttle, with wings at either side of the hull and a tailplane on the dorsal surface, suggesting that it could be flown into an atmosphere.

In 2151, the Enterprise discovered this vessel drifting becalmed in space, its two occupants unconscious.