Jeffa Autopilot Failure

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   Yes, the outer hole will give more power to the rudder in exchange for slightly slower turning speed. I would prioritize power over speed, so outer hole for sure.

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Arcadia Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 27 November 2017 Location: Sag Harbor, USA Status: Online Points: 1112	Post Options Post Reply Quote Arcadia Report Post Thanks(0) Quote Reply Posted: 12 October 2022 at 01:19
	Yes, the outer hole will give more power to the rudder in exchange for slightly slower turning speed. I would prioritize power over speed, so outer hole for sure.
	Leon / ARCADIA 2018 Hanse 588 Sag Harbor, NY

Wild Members Profile Send Private Message Find Members Posts Add to Buddy List Vice Admiral Joined: 18 March 2010 Location: Turkey-Greece Status: Offline Points: 937	Post Options Post Reply Quote Wild Report Post Thanks(0) Quote Reply Posted: 16 October 2022 at 12:38
	Hello I ‘m following this topic for a time. Nobody is mention the offset who is required between the center of the drive unit shaft and the center of the rudder shaft. On all of the pictures I see they are on the same centerline. Mistake by Hanse? This mistake offered a lot of problems like blocking by complete turn and a lot of extra power needed,Our am I wrong? Jefa mention that under “ Mechanical Installation “ DD1 direct drive. uploads/2431/install-dd1_2022-10-16_12-18-35.pdf By a offset of 106 mm you need a distance of 200mm from the rudder shaft center to the fixing point of the draglink on the tiller arm and 130 mm from the shaft center of the drive to the fixing point of the draglink. must outwards If Offset of 127mm , rudder shaft - fixing point draglink 250mm and drive shaft - fixing point draglink 165mm .must inwards
	Wild and Wet Belgium 545e#268

Arcadia Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 27 November 2017 Location: Sag Harbor, USA Status: Online Points: 1112	Post Options Post Reply Quote Arcadia Report Post Thanks(0) Quote Reply Posted: 16 October 2022 at 13:49
	You are correct about offset, but it can be simply the difference in length between the drive arm and the rudder arm regardless of their alignment. In this case there is enough of a difference to create the proper geometry as long as the outer rudder hole is used. But as I mention earlier, both arms need to be parallel. In the case of the rudder, the arm is the line drawn between the rudder shaft and the attachment hole, not the physical arm which is welded.
	Leon / ARCADIA 2018 Hanse 588 Sag Harbor, NY

tobo2 Members Profile Send Private Message Find Members Posts Add to Buddy List Captain Joined: 14 February 2014 Location: Switzerland Status: Offline Points: 303	Post Options Post Reply Quote tobo2 Report Post Thanks(0) Quote Reply Posted: 19 October 2022 at 10:51
	Dear Wil It's not a mistake by Hanse. For the 508 Stig Jensen of Jefa told me to make sure that the draglink is mounted CC 205mm on the tiller on the rudderstock using the outer hole. There shall be app. 90dg between the draglink and the output lever on the drive unit, and 90dg between the draglink and the tillerlever on the rudderstock. (s. buildcard)

Arcadia Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 27 November 2017 Location: Sag Harbor, USA Status: Online Points: 1112	Post Options Post Reply Quote Arcadia Report Post Thanks(0) Quote Reply Posted: 19 October 2022 at 22:52
	If you look at the RED lines in the installation that was posted, you will see the they are not parallel. This is not a correct set up. The pilot arm needs to align with the BLUE line. This can be done by lengthening the drag link by about 50mm. Once that is done, the sensor bracket needs to swivel clockwise so that it 90:degrees to the pilot arm. Otherwise it will have different readings from port to starboard. Also note the yellow lines that were previously drawn are not relevant to an installation. All lines need to pass through the two axis they represent.
	Leon / ARCADIA 2018 Hanse 588 Sag Harbor, NY

Arcadia Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 27 November 2017 Location: Sag Harbor, USA Status: Online Points: 1112	Post Options Post Reply Quote Arcadia Report Post Thanks(0) Quote Reply Posted: 19 October 2022 at 22:54

	Leon / ARCADIA 2018 Hanse 588 Sag Harbor, NY

SVZara Members Profile Send Private Message Find Members Posts Add to Buddy List Captain Joined: 04 November 2018 Location: Boston, MA Status: Offline Points: 235	Post Options Post Reply Quote SVZara Report Post Thanks(0) Quote Reply Posted: 19 October 2022 at 23:55
	It's too bad the rudder arm isn't attached at the mid point of the shaft radius instead of hanging off the side of the quadrant.
	Marc S/V Zara 2016 Hanse 505, Hull #129

Arcadia Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 27 November 2017 Location: Sag Harbor, USA Status: Online Points: 1112	Post Options Post Reply Quote Arcadia Report Post Thanks(0) Quote Reply Posted: 20 October 2022 at 00:02
	I agree. That would be better. I can see that the part of the tiller that clamps on to the rudder shaft would probably be in the way, so that’s probably why Jeffa went with the more awkward set up.
	Leon / ARCADIA 2018 Hanse 588 Sag Harbor, NY

Wild Members Profile Send Private Message Find Members Posts Add to Buddy List Vice Admiral Joined: 18 March 2010 Location: Turkey-Greece Status: Offline Points: 937	Post Options Post Reply Quote Wild Report Post Thanks(0) Quote Reply Posted: 20 October 2022 at 12:14
	you are absolutely right. If you can change the position of the drive unit so that the center of the drive shaft switch to the green lines crossing point, the angles between rudder tiller- draglink and drive tiller-draglink will be both 90 degrees and both tillerarms will be parallel to eachother the yellow arrow is the offset like in de Jefa instructions. Only adjusting the length of the draglink you can never achieve this Just m2c. Edited by Wild - 20 October 2022 at 12:19
	Wild and Wet Belgium 545e#268

tobo2 Members Profile Send Private Message Find Members Posts Add to Buddy List Captain Joined: 14 February 2014 Location: Switzerland Status: Offline Points: 303	Post Options Post Reply Quote tobo2 Report Post Thanks(0) Quote Reply Posted: 20 October 2022 at 14:53
	Hi Will, you seem to be an expert for steering geometry and physical momentus. I will send it to Stig Jensen of Jefa to comment. If you really mean that the motor has to be mounted more to the right side (offset) this would mean that Hanse has made a general mistake on the 508s (and also the 505s). And let's remember: We want an AP that works fine more than only two years! Rgrds Thomas



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