We used the 1990s version of that. Joe Della Barba
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Frederick G Street Sent: Tuesday, March 26, 2013 11:21 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Autopilots I'd definitely use this drive with a Raymarine corepack: http://www.savinglots.com/lotprod.asp?item=OCTAF1212LAM12 Cheaper than the Raymarine linear drive, too. Fred Street -- Minneapolis S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^( On Mar 26, 2013, at 10:07 AM, "Della Barba, Joe" <joe.della.ba...@ssa.gov<mailto:joe.della.ba...@ssa.gov>> wrote: We loved the hydraulic units because a hydraulic ram is nearly indestructible. The only thing that can really go wrong is a bad seal and that can be fixed anywhere in the world. A bad pump can be swapped out fairly easily in a remote spot. When the rudder was not supposed to be moving the hydraulics lock it in place with much less strain on the device than the mechanical drives. The linear drives are more fiddly, with gears and bearings. They would tend to get chewed up under heavy use and are not easily fixable in Samoa or Bermuda - they pretty much have to go back home for repairs. Remember this is me spending other people's money ;) Now if you already have a linear drive it isn't like it won't work - they will steer the boat. In your install make SURE there is no lost motion with the mount flexing. That will feed back through the rudder sensor and the thing will endlessly be going back and forth. We had boats where the HULL flexed enough to cause this issue and we had to get reinforcements glassed in.
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