I was all ready to buy a Raymarine ST-40 wind instrument to link to our C-70 to get VMG to the wind, and then I read it was inaccurate at best if not useless. Raymarine says it’s for power boats. Some have said you want the much more expensive vane system. I think many sailors use the ST-40 with good results, am I wrong? What has your experience been with the system you have?
Rotavecta-No good for sail?
- Thread starter Quoddy
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No good for sail?
I would follow Raymarine's recommendations and not use the Raymarine ST40 with the rotavecta transducer for a sailboat application. Raymarine clearly states that it's for power boat use only. I'm sure they have their reasons. I have the Raymarine ST60 wind system and find it very accurate as long as you take the time to calibrate it properly. That goes for any instrument system. If you are going to use it for upwind work, the Close Hauled meter is great as it expands the scale so you can more easily read fine deviations in wind direction. I would imagine that one of the reasons that the rotavecta transducer would not be good for a sailboat application is that it doesn't project forward of the headstay. It would be subjected to the upwash from the headsail and give inaccurate readings.
I would follow Raymarine's recommendations and not use the Raymarine ST40 with the rotavecta transducer for a sailboat application. Raymarine clearly states that it's for power boat use only. I'm sure they have their reasons. I have the Raymarine ST60 wind system and find it very accurate as long as you take the time to calibrate it properly. That goes for any instrument system. If you are going to use it for upwind work, the Close Hauled meter is great as it expands the scale so you can more easily read fine deviations in wind direction. I would imagine that one of the reasons that the rotavecta transducer would not be good for a sailboat application is that it doesn't project forward of the headstay. It would be subjected to the upwash from the headsail and give inaccurate readings.
i have the st 40 with the rotavecta and it is acurate , it give the same direction as the windex, it wasn't at the begining then i calibrated it and it is fine and dandy now, the only downside is that i had to cut the wire at the top of the mast for winter removal and at the mast step for the same reason, it did not affect the readings
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