Hey Stefen i dont know if you remember but at the ORCAS meet we went to you were talking about making an auto rising periscope assembly. Did you ever finish building that. Ive made a small one for my Akula and it works almost all the time. SOmetimes it will kink on the way up. I was wondering what success youve had.
I drew a rough sketch of a cork float that should work to lift and lower the periscopes as the boat surfaces or submerges. It has a see/saw type lever under it that acts to reverse the lifting effect of the cork.