I also found a couple of nice pics of a CH-54 with a rotor fold and rotor blade support struts . It's on the Aeroweb Aviation Enthusiast Corner ,
http://aeroweb.brooklyn.cuny.edu/air.htm I went to aircraft manufactures , under 'S' for sikorsky and then CH-54 . I tried uploading the two pics but image shack said the file was too big . There's probably a way to re-size the images , I'm not that good with computer's , but the pics aren't hard to find . John