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What exactly is you want in a plotter? Opencpn with a gps should be fine shunting, magnetic compass could be 180 deg out half the time though.
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2021-06-15, 12:46 AM
(This post was last modified: 2021-06-15, 12:48 AM by seandepagnier.)
I do have interest to support proas in pypilot.
The thing is, it already works... The difference as mentioned is compass 180 degrees out half the time, but this won't stop pypilot. Now you need 2 rudders generally, so not sure if you have 2 actuators or what.
So perhaps a shunt function instead of tack. tacking isnt really working anyway, (but it will very soon) What else is different for proas in opencpn/pypilot?
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flipping wind & compass 180 deg should be easy enough in node red, though such a minority group might not be anything more than that..
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2021-06-15, 06:04 PM
(This post was last modified: 2021-06-15, 06:08 PM by seandepagnier.)
Should it use heel or gps for hints to determine which shunt you are on or is this manually entered?
a lot of the cheapest wind sensors like davis have 7 degree deadband This should be aimed to leeward and 90 degree offset added where wind is never supposed to come from as opposed to straight forward like other sailing boats.
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yes, ultrasonic is very intersting but I am skeptical of the accuracy especially at low speeds as the time of flight is quite fast. You generally need two transducers. Now, if you could separate them by several meters the accuracy could get much higher.
In theory a paddle wheel style water speed sensor should work in both directions, but not sure all of them are able to tell you which direction they spin without 2 magnetic sensors.