Lay out tubing for construction of the center section wing spars. Verify pipe lengths and layout metal sheeting for connecting the pipes together. Install inserts in the top pipe of each spar. Mark off 4" spacing for each rivet on the sheet metal. Drill and cleo the metal sheeting. Ensure alinement and drill a second hole. Cleo siding to spars and completly rivet the sheet in place. Repeat for the other side.
