Control surfaces

["Paul Suds" <paul_suds@hotmail.com>]

I'm still conceptulizing, but have reduced my problem areas down to about 
six. One not included, but one that could make a big difference with 
controlability is control actuators. What are some of the mechanisms for 
controlling surfaces outside of the hull? I do not want to use mechanical 
penetrations through the hull, and would like to exclude use of a hydraulic 
pump or cylinder inside the hull (person powered). Ideally this actuator 
would be controlled electrically, via joy stick, where the actuator would be 
outside the hull. Unfortunately, that probably means another motor that 
would have to be sealed. Play would have to be minimal. At this point I'm 
open to any good suggestions, mechnical/hydraulic/electric/magnetic, hull 
penetration or not.
Suds

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