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installing Simrad RF25 rudder feedback

Old 08-29-2017, 08:24 AM
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Default installing Simrad RF25 rudder feedback

I've never a Simrad autopilot before, but it was on an outboard, so this is the first time I'm installing a rudder feedback unit.

Based on the install specs, it looks like it would be preferable for me to install it where the red circle is on the attached....but that would mean moving the box for the trim tabs.

So, I was thinking of installing where the blue circle is.....but I am thinking that the steering ram would be too close.

Just wanted to confirm with any experts what they thought.
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Old 08-29-2017, 08:33 AM
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The blue should be fine if space. As the ruder moves. It will move foward towards the blue. But the sensor arm does as well. If that makes sense. Should move together and always be the same distance apart. (Parellel)
Old 08-29-2017, 08:42 AM
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Originally Posted by smac999 View Post
The blue should be fine if space. As the ruder moves. It will move foward towards the blue. But the sensor arm does as well. If that makes sense. Should move together and always be the same distance apart. (Parellel)


I don't have the RF25 in possession yet...but based on the specs, it might be too long...(with the rudder centered, it might not have enough room) in which case, will have to put it on the other side. But thought it would be wise to solicit opinions...
Old 08-30-2017, 09:13 AM
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The bolt a peice of starboard to the metal that sticks forward. And mount feedback to starboard
Old 08-30-2017, 10:45 AM
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Originally Posted by smac999 View Post
The bolt a peice of starboard to the metal that sticks forward. And mount feedback to starboard


Had to do a dedicated mount on mine....
Old 08-30-2017, 11:52 AM
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As long as you are between the 5.9 and 13.6 inches of the specs you will be good. I also suggest favoring the ram side of the rudder arm.
Old 08-30-2017, 12:18 PM
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Hmmm.....If I "extend" the piece of metal arm attached to the rudder.....so in effect, the steering ram moves further back... I would get the clearance to put the RF25 on the same side as the ram, but I am thinking my steering lock would be reduced.....i.e. with the steering ram fully extended, attached to a longer "arm", the rudder angle would be reduced...


this is new to me, and I am just thinking in theory.....so I'm happy to be corrected.

IMBrian - Why would you favour the ram side? Is just because of the box for the trim tab motor on the other side?
Old 08-30-2017, 12:23 PM
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Originally Posted by gcmarshall View Post
Hmmm.....If I "extend" the piece of metal arm attached to the rudder.....so in effect, the steering ram moves further back... I would get the clearance to put the RF25 on the same side as the ram, but I am thinking my steering lock would be reduced.....i.e. with the steering ram fully extended, attached to a longer "arm", the rudder angle would be reduced...


this is new to me, and I am just thinking in theory.....so I'm happy to be corrected.

IMBrian - Why would you favour the ram side? Is just because of the box for the trim tab motor on the other side?


Im saying to favor the ram side of the Rudder Arm, meaning closer to where the ram mounts to the rudder arm. If you go on the rudder post side you will be receiving very little motion/ feedback to the RF25.
Old 08-30-2017, 03:24 PM
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Originally Posted by gcmarshall View Post
Hmmm.....If I "extend" the piece of metal arm attached to the rudder.....so in effect, the steering ram moves further back... I would get the clearance to put the RF25 on the same side as the ram,

Extend the metal base fwdward. So the blue circle moved forward. Just bolt a peice of metal or starboard where the blue dot is. But wider
Old 08-30-2017, 06:56 PM
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Originally Posted by InternationalMarineBrian View Post
Im saying to favor the ram side of the Rudder Arm, meaning closer to where the ram mounts to the rudder arm. If you go on the rudder post side you will be receiving very little motion/ feedback to the RF25.


Hmm...I'm either really dense or really sleepy!


Just to state the obvious, the picture is "upside down" meaning the left side of the pic is the starboard side of the boat, and the right side is to the port side of the boat.


So, you favor mounting the RF25 on the port side of the bracket (which is the steering ram side). I agree, that mounting the attachment rod close to where the ram mounts to the rudder arm is preferable....the longer out I go, the more the movement.


To me, the movement is the same though, whether the RF25 is on the port or starboard side.....? As long as it is attached close to where the ram mounts to the rudder arm...
Old 08-30-2017, 07:01 PM
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Originally Posted by smac999 View Post
Extend the metal base fwdward. So the blue circle moved forward. Just bolt a peice of metal or starboard where the blue dot is. But wider

If I moved the blue circle forward.....then the base of the RF25 would be further forward than the base of the rudder arm....and when the rudder arm moved say 30 degrees, the RF25 would move more, say 45 degrees....


Shouldn't they always have the same degrees? or maybe the computer would compensate for that?


They are aligned in the installation instructions....
Old 08-30-2017, 11:40 PM
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Originally Posted by gcmarshall View Post
Hmm...I'm either really dense or really sleepy!


Just to state the obvious, the picture is "upside down" meaning the left side of the pic is the starboard side of the boat, and the right side is to the port side of the boat.


So, you favor mounting the RF25 on the port side of the bracket (which is the steering ram side). I agree, that mounting the attachment rod close to where the ram mounts to the rudder arm is preferable....the longer out I go, the more the movement.


To me, the movement is the same though, whether the RF25 is on the port or starboard side.....? As long as it is attached close to where the ram mounts to the rudder arm...

You are talking port / stb. He is talking fwd / aft . You are both on different pages.
Old 08-30-2017, 11:44 PM
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Originally Posted by gcmarshall View Post
If I moved the blue circle forward.....then the base of the RF25 would be further forward than the base of the rudder arm....and when the rudder arm moved say 30 degrees, the RF25 would move more, say 45 degrees....


Shouldn't they always have the same degrees? or maybe the computer would compensate for that?


They are aligned in the installation instructions....
Most pilots you can set the rudder angles. Other option then is cut the rf25 shorter. I have done that on feed backs too. Some have multiple mounting holes. The last one didn't so I cut it in half. Slid it back a few inches and bolted both peices back to together. They fit perfectly back together shorter but that one was a raymarine. You'd have to look at that one. I thought I took pictures but I don't see any
Old 08-31-2017, 04:58 AM
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Mount the RF25 on the blue circle or as near as possible. This is on the same plane as the rudder post. The rudder arm attaches to the rudder post. The steering ram then attaches to the rudder arm. The transmitter arm of the RF25 will parallel the rudder arm and is connected via the transmitter rod. 1.7- 5.1 inches out.
Old 08-31-2017, 04:59 AM
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Originally Posted by smac999 View Post
Most pilots you can set the rudder angles. Other option then is cut the rf25 shorter. I have done that on feed backs too. Some have multiple mounting holes. The last one didn't so I cut it in half. Slid it back a few inches and bolted both peices back to together. They fit perfectly back together shorter but that one was a raymarine. You'd have to look at that one. I thought I took pictures but I don't see any


Ok - this has multiple mounting holes too.... so, I can probably cut off the remainder if it is designed for that.
Old 08-31-2017, 05:10 AM
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Originally Posted by InternationalMarineBrian View Post
Mount the RF25 on the blue circle or as near as possible. This is on the same plane as the rudder post. The rudder arm attaches to the rudder post. The steering ram then attaches to the rudder arm. The transmitter arm of the RF25 will parallel the rudder arm and is connected via the transmitter rod. 1.7- 5.1 inches out.


Gotcha!


So, if I connect the transmitter rod on the inner slot on the RF25...i can just cut the remainder off, so it doesn't butt on the steering ram? Cause the full length of the RF25 is 7".....and I don't have 7" of space there.
Old 08-31-2017, 05:12 AM
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Mount the transmitter rod as far out as practical , allowing clearance.
Old 08-31-2017, 05:18 AM
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Thanks Brian.


When I have it in my hands, I guess it will be obvious. I do get that the longer out, the more accurate, thus the better.... so will mount it as far out as practical....and assume I can cut the last inch or two off, if it causes an issue with the steering ram.
Old 09-26-2017, 01:18 PM
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I got the RF25 rudder feed back now.

My plan is shown on the pic...

Basically, to cut the RF25 off to allow clearance of the ram...

This sounds feasible?

I just want to make sure before I do something irreversible...
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Old 09-26-2017, 01:20 PM
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Yes it does. Leave the arm as long as possible

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