Abstract: In the present trailer, a pair of cross members are pivoted on the trailer frame about parallel horizontal fulcrum axes and extend transversely across a boat trailer frame. A keel receiver is provided on each cross member, extending to one side of the respective fulcrum axis. A pair of elongated bunk members extend longitudinally relative to the boat trailer frame, connected at ends to the two cross members such that the cross members are linked together by the elongated bunk members. A pair of elongated yokes are mounted at yoke pivots to the rearward cross member and extend longitudinally between forward and rearward yoke ends. A pair of short bunk members are mounted to the pair of elongated yokes on a transverse short bunk pivot axis that are transverse to the boat trailer frame.

Abstract: In the present hull and keel support, a pair of cross members are pivoted about parallel horizontal fulcrum axes and extend transversely across a boat trailer frame. Each cross member includes a central keel receiver on one side of the associated fulcrum axis. Gimbal arrangements pivotably mount the hull engaging members and establish a first pivot axis parallel to the fulcrum axis, enabling the hull engaging members and keel supports to conform to a variety of boat hull configurations, while maintaining a desired weight distribution proportion between the keel receivers and hull engaging members. The hull engaging members also move about second pivot axes, substantially perpendicular to the fulcrum axes. In a first preferred form, the hull engaging members are elongated bunks mounted to pairs of gimbal mechanisms, a forward pair of which are slotted to permit deflection of the bunks. In another preferred form, hull engaging rollers are mounted at opposed ends of pivoted bars.