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#11
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Raymarine Autopilot does not handle my a-spinnaker
Although I did try the wind-vane mode first, which dosn't work to bad unless the boat is being knocked around, the focus of my question is using it just in the normal AUTO mode (e.g. point the boat, and click AUTO). Downwind without my spinnaker I get very very good results ever since I added the rate gyro to my S1G course computer. My wife claims it anticipates better than than I do when going down wind with following seas. I doubt it anticipates anything, just responds quickly, but maybe Raymarine got some artificial intelligence stuff going on I don't know about. By the way, it work's pretty good with my spinnaker also in light air. It's the first time I put the spinnaker up in 10 knots+ of wind, that was the focus of my question. What I got back from this group is that I should increase Rudder Gain (it was set to 2) and Response Time. While I have not had the opportunity to do this with my spinnaker, I did increase Rudder Gain from 2 to 5 on Saturday while sailing with my normal sails. I found the autopilot very assertive (rather than slow) when responding to course changes, and believe it very well might be the answer. What I got back from Raymarine last week, was that I need to send them my autopilot for a software update that fixes a problem they are aware of. I guess I should still do that, if they know of a problem. Dan Daniele Fua wrote: As I understand you use your autopilot with a wind-vane and I am not even sure that, in this configuration, the signal from the gyro is used at all. If it is so, you should be aware that the wind-vane is sensitive to the direction and intensity solely of the "apparent wind"; it is a well known issue that wind steering has problems when going downwind due by the "funny" behavior of the vector composition of the real-wind plus the velocity-wind. Not to mention the wind disturbance at the vane produced by rolling and yawing which may be quite important in some situations. Beside this, as an old timer wind-sailor, I would never rely on an autopilot under spinnaker especially on a wind higher than, say, 10-12 knots. So I am afraid that the solution is: under spinnaker, switch off the autopilot and use a good helmsman... :-) Regards Daniel |
#12
posted to rec.boats.electronics
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Raymarine Autopilot does not handle my a-spinnaker
Dennis,
Make that ... very insulting. Where do you get off telling people they are wasting their time assisting other people in the group ? Dan b393capt wrote: Dennis, This was insulting. Dan Dennis Pogson wrote: I've already told him this but he has flatly rejected my contention that computers can't anticipate, which is what a good helmsman can do! You are wasting your time on this one. |
#13
posted to rec.boats.electronics
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Raymarine Autopilot does not handle my a-spinnaker
I am curious as to why you added the gyro, and what benefits you have
noticed from it in that the S1G has the same auto gyro built into it. Does a second gyro help or confuse matters? Da2ny "b393capt" wrote in message oups.com... Although I did try the wind-vane mode first, which dosn't work to bad unless the boat is being knocked around, the focus of my question is using it just in the normal AUTO mode (e.g. point the boat, and click AUTO). Downwind without my spinnaker I get very very good results ever since I added the rate gyro to my S1G course computer. My wife claims it anticipates better than than I do when going down wind with following seas. I doubt it anticipates anything, just responds quickly, but maybe Raymarine got some artificial intelligence stuff going on I don't know about. By the way, it work's pretty good with my spinnaker also in light air. It's the first time I put the spinnaker up in 10 knots+ of wind, that was the focus of my question. What I got back from this group is that I should increase Rudder Gain (it was set to 2) and Response Time. While I have not had the opportunity to do this with my spinnaker, I did increase Rudder Gain from 2 to 5 on Saturday while sailing with my normal sails. I found the autopilot very assertive (rather than slow) when responding to course changes, and believe it very well might be the answer. What I got back from Raymarine last week, was that I need to send them my autopilot for a software update that fixes a problem they are aware of. I guess I should still do that, if they know of a problem. Dan Daniele Fua wrote: As I understand you use your autopilot with a wind-vane and I am not even sure that, in this configuration, the signal from the gyro is used at all. If it is so, you should be aware that the wind-vane is sensitive to the direction and intensity solely of the "apparent wind"; it is a well known issue that wind steering has problems when going downwind due by the "funny" behavior of the vector composition of the real-wind plus the velocity-wind. Not to mention the wind disturbance at the vane produced by rolling and yawing which may be quite important in some situations. Beside this, as an old timer wind-sailor, I would never rely on an autopilot under spinnaker especially on a wind higher than, say, 10-12 knots. So I am afraid that the solution is: under spinnaker, switch off the autopilot and use a good helmsman... :-) Regards Daniel |
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