Spar bow

Arc a longeron

Abstract

In some embodiments, an archery bow comprises a frame, a first rotatable member supported by the frame, a second rotatable member supported by the frame and a limb supported by the frame. The first rotatable member comprises a first track, a second track and a cam. The cam comprises a power cable track. A bowstring cable segment extends from the first rotatable member to the second rotatable member. A control cable segment extends from the first rotatable member to the second rotatable member. A power cable extends from the limb to the first rotatable member. When the bowstring is drawn, the first track feeds out the bowstring cable segment, the second track feeds out the control cable segment and the power cable track takes up the power cable. In some embodiments, the frame comprises a riser and a spar. In some embodiments, the first rotatable member is supported by the spar.

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