When there's absolutely no room for a tiller arm at rudder you may want to consider a Timing-Belt. There are teeth on the belt and in pulleys, so there is No slippage.
They are made in many sizes, including very small, like is needed in sub models.
The actual tiller is mounted further forward in hull, with a pulley on it's post, then the belt goes aft to the rudder post and it's pulley. The pulleys are very light weight aluminum, so this system doesn't add much weight but are very strong and reliable.
Here's a link to a company that sells belts and pulleys:
http://www.motionindustries.com/moti...ductSearch.jsp
Note: when trying this Link, directly to belt sub-catagory, it was extremly slow for some reason. you may have to go to their homepage and do a search by catagory.
They are made in many sizes, including very small, like is needed in sub models.
The actual tiller is mounted further forward in hull, with a pulley on it's post, then the belt goes aft to the rudder post and it's pulley. The pulleys are very light weight aluminum, so this system doesn't add much weight but are very strong and reliable.
Here's a link to a company that sells belts and pulleys:
http://www.motionindustries.com/moti...ductSearch.jsp
Note: when trying this Link, directly to belt sub-catagory, it was extremly slow for some reason. you may have to go to their homepage and do a search by catagory.
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