Figure 5-21. Inserting batten into batten pocket. Figure 5-20. Wings spread and battens organized to insert into  wings. Note small stepladder holding up keel. Figure 5-23. Wing ready to tension. Figure 5-19. Raising the kingpost and spreading the wings as needed  to keep the kingpost upright. Figure 5-22. Attaching double pull batten (inset). Batten secured  into batten pocket. go into on both sides. Note the protective pads are still on  the wing tips so they are protected.  [Figure 5-20]  Insert the  battens into the batten pockets, starting at the root and work  out to the tip.  [Figure 5-21]  Most batten attachments are  double pull.  [Figure 5-22]  Some manufacturers use cord or  elastic, and others use a system that slips into the sail itself.  See the POH for wing details. Insert battens from the root  towards the tip about ¾ the way out on each side. Leave  the tip battens for later. Spread the wings as far as possible.  [Figure 5-23]  Check to ensure all the wires are straight, not  wrapped around, and clear to tension the wing. Tension the  wing by pulling back on the crossbar tensioning cable and  pulling the crossbar back into position. This may require  significant effort for some wings. Secure the tensioning  cable to the back of the keel.  [Figure 5-24]  If the keel does  not extend out, then support the aft end of the keel to lift the  tips off of the ground.  [Figure 5-25]  Move to the front and  secure the front control frame flying wires to the underside  nose attachment.  [Figure 5-26]  Remove the tip bag protectors  and install the tip battens, continuing to move from the root to  the tips on each side. Insert the washout strut into the leading  edge. Each manufacturer has its own washout strut systems  and tip battens. Some manufacturers have no washout struts.  Refer to the POH for wing specifi cs.  [Figure 5-27] 5-10