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Old 18-05-2013, 14:58   #1
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autopilot linear drive unit install

thinking of buying raymarine linear drive autopilot
cant find manual online
has anyone installed one of these on wheel steering
and if so how does drive unit arm attach?
i do have emergency tiller shaft if thats an option.
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Old 18-05-2013, 16:42   #2
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Re: autopilot linear drive unit install

The linear drive actuates the rudder, pushing or pulling the rudder shaft via the quadrant. This will turn the wheel if the wheel is engaged to the steering cable at the pedestal, but it doesn't directly use the wheel to effect the steering changes. You can get a separate wheel actuated autopilot if you want it, but it isn't as strong or durable as a linear drive. You should add a rudder position indicator to the array (see the catalog). It's not a very difficult process. In fact, trying to understand the manual on how to program the autopilot may be the most of your challenge.
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Old 18-05-2013, 17:43   #3
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A better solution is to mount the linear drive, connected to the rudder stock by its own dedicated arm rather then the quadrant.


Mounting autopilot arms IS quite a complex operation. It can require new quadrants , bulkhead mounts , correct positioning etc etc

Dave
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Old 19-05-2013, 15:40   #4
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Re: autopilot linear drive unit install

Edson sells a very nice tiller arm (Bronze) that you might be able to use. You will need a keyway on the rudder post/shaft for strength. Mine had enough of a keway above the quadrent to fit the Edson unit. It is very important to make sure the attachment point to the boat is very sturdy as these linear drive units exert lots of force. A Properly installed autopilot is a great and worthy addition.
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Old 19-05-2013, 16:03   #5
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Re: autopilot linear drive unit install

Quote:
Originally Posted by S/V Antares View Post
Edson sells a very nice tiller arm (Bronze) that you might be able to use. You will need a keyway on the rudder post/shaft for strength.
I think they sell two versions - one with keyway and another that takes a through-bolt (we have that one). Either way, it will involve drilling or machining the shaft. Keyway may be easier, but I am not that much of a machinist.

Mark
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