Umbilical Arms for the Saturn V Vehicle

Umbilical arm design for the Saturn V vehicle is presented with emphasis on the arm servicing the S-IVB stage aft position. Arm criteria are outlined, followed by a description and operation of the launch equipment, in this order:the hinged, truss structure; the arm retraction system; the withdrawal mechanism; and the extension platform. Systems equipment and reliability, an important result of this work, will be substantiated by a rigorous testing program.