shaft length autopilot drive unit

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superboots

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I plan to install an autopilot as a back up . I intend to use Raymarine components. However I am unsure about the drive unit. My intention is to have a linear drive attached to the steering quadrant. However, I am unsure about the shaft length of the unit. Raymarine offer long and short shaft lengths for their linear drives. What are the parameters for choosing which type to fit?
 
superboots said:
I plan to install an autopilot as a back up . I intend to use Raymarine components. However I am unsure about the drive unit. My intention is to have a linear drive attached to the steering quadrant. However, I am unsure about the shaft length of the unit. Raymarine offer long and short shaft lengths for their linear drives. What are the parameters for choosing which type to fit?
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Any Use?

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The installation instructions give you an optimum length from the rudder stock to attach the end of the linear drive, normally to a stub tiller, but this length can be varied. The further the length from the rudder stock, the smaller the angle the rudder can travel and vice versa, the closer, the more the rudder angle and faster rudder swing. The downside is that it will put more strain on the linear drive.

This is mine, set up as per the book:
Damn, pics too large, I will edit them down and post . . .

Quadrent2s.jpg

Quadrent4s.jpg
 
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Thanks . I wan not aware of an issue of displacement. I don't think it will apply. Also the stroke may not be an issue as the rudder angle is not likely to be large. Looks like it may come down to space and position of mount for the drive. The quadrant is located in a cramped area behind the aft cabin bulkhead. There is already other bits of kit located there! Bavaria Ocean 47
 
Question - these drive units - do they have optional screw in sections to modify shaft length as the Tiller Pilots do ?

Just asking.

I was lucky that the 2000 unit I inherited with my 38 had such screw in section that fitted exactly what was needed to swap to my old trusty 1000.
 
Refueler said:
Question - these drive units - do they have optional screw in sections to modify shaft length as the Tiller Pilots do ?

Just asking.

I was lucky that the 2000 unit I inherited with my 38 had such screw in section that fitted exactly what was needed to swap to my old trusty 1000.
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No.
 
Refueler said:
If I answered that honestly - it would incur the wrath of moderators. As you well know.
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There is something wrong with you.

You asked a question with a yes or no answer, i answered it. Now you are complaining about the simple, one word answer ?????
 
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Monte: Your sub tiller looks an interesting fitting. Was it part of the manufacturer's installation for the steering or has this been added? Is it a separate piece to the quadrant coupling?
 
The ram can be connected to the quadrant or you can add a separate tiller arm if there is room on the stock and it suits the location (height) of the fixed end. Tiller arms available from Jefa.
 
superboots said:
Monte: Your sub tiller looks an interesting fitting. Was it part of the manufacturer's installation for the steering or has this been added? Is it a separate piece to the quadrant coupling?
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The stub tiller is individual to the type / model of boat, so is sourced separately.
I think I bought mine from ASAP but it was a long time ago now!
The fitting just clamps onto the rudder stock so it can be positioned at the correct height and aligned at 90° to the LD.
 
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