nabberuk
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Auton, The Autonomous Sail Boat

Thu Jul 12, 2012 9:15 am

Hello,

I'm currently in the planning stages of an autonomous sail boat that will cross the Atlantic in the microtransat challenge.

Powered by the Pi and various sensors (wind, compass, tilt etc), the boat will be run using the combination of batteries and solar cells.

If anyone's interested i'm keeping a blog going at http://www.autonboat.com or you can follow us on twitter; @autonboat
the autonomous sailing boat: www.autonboat.com

Ravenous
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Re: Auton, The Autonomous Sail Boat

Thu Jul 12, 2012 12:27 pm

From Europe to the Caribbean - the wrong way round, as far as the prevailing wind is concerned... eek. No surprise nobody's finished it yet...

nabberuk
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Re: Auton, The Autonomous Sail Boat

Thu Jul 12, 2012 4:25 pm

I'd love to live in the Caribbean, but unfortunately i do not!

So unfortunately I'll have to make do with launching from Europe and make sure it's pretty good at tacking!
the autonomous sailing boat: www.autonboat.com

Ravenous
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Re: Auton, The Autonomous Sail Boat

Thu Jul 12, 2012 4:31 pm

Could just mount a forward-facing windmill on the top and drive a propellor from it - instant upwid sailing. (Probably cheating.) (Possibly violates at least one of the rules of thermodynamics too...?)

I know nothing about sailing (well I know vaguely how tacking into the wind works) but it seems being tilted over it would be tricky to keep the bow at the right heading in a blustery wind...

nabberuk
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Re: Auton, The Autonomous Sail Boat

Thu Jul 12, 2012 4:34 pm

i plan on using dual rudders as the boat will live most of it's life tilting and that should give it far more control.
the autonomous sailing boat: www.autonboat.com

Rabjerg
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Re: Auton, The Autonomous Sail Boat

Thu Jul 12, 2012 4:38 pm

You shoud race the guy form http://fishpi.org/. :D
.. or better cooperate.

nabberuk
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Re: Auton, The Autonomous Sail Boat

Thu Jul 12, 2012 4:42 pm

Rabjerg wrote:You shoud race the guy form http://fishpi.org/. :D
.. or better cooperate.
We're already cooperating, i've been a member of fishpi's forum for awhile (and will continue too!). I think there's certainly info we can share etc. Some things will be a little different though as the fishpi isn't powered by the wind.

I'm certainly excited about seeing how they both evolve.
the autonomous sailing boat: www.autonboat.com

nabberuk
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Re: Auton, The Autonomous Sail Boat

Mon Jul 23, 2012 12:02 pm

Can anyone think of any interesting sensors (not one that will aid the control of the boat) that i should include. For example, Thermometer/Humidity sensor?
the autonomous sailing boat: www.autonboat.com

Ravenous
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Re: Auton, The Autonomous Sail Boat

Mon Jul 23, 2012 12:13 pm

Cloud coverage - either by camera (if fitted) or maybe some simple measure of the overall light level? (This might get fooled by the sail casting a shadow on the sensor though, unless several sensors are fitted in different places.)

I know you've mentioned temperature, but what about separate sensors for air and water temperature? (A water temp. sensor might be tricky though if it trails behind, as it might attract fish, etc. Might even act as a sea anchor if enough gunk sticks to it.)

Just wild guessing.

EDIT: oh and I forgot, air pressure.

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Mortimer
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Re: Auton, The Autonomous Sail Boat

Mon Jul 23, 2012 12:55 pm

Water salinity.
Acidity.
Pitch, roll.
Light levels.
Wind speed/direction.
--------------
The purpose of a little toe is to ensure you keep your furniture in the right place.

nabberuk
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Re: Auton, The Autonomous Sail Boat

Mon Jul 23, 2012 3:48 pm

Water salinity.
Acidity.
Pitch, roll.
Light levels.
Wind speed/direction.
Pitch/Roll and Wind Speed/Direction will already be recorded as it will be used for the actual sailing.

All good suggestions, i like the idea of salinity/acidity.
the autonomous sailing boat: www.autonboat.com

Ravenous
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Re: Auton, The Autonomous Sail Boat

Mon Jul 23, 2012 3:54 pm

You might get a few ideas from the pacx site:

http://liquidr.com/pacx/pacxspecs/

...though I have no idea what budget or size/power requirements are for the sensors they're using. I especially like the fluorometer idea - for measuring luminous plankton?

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Mortimer
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Re: Auton, The Autonomous Sail Boat

Mon Jul 23, 2012 6:12 pm

How about galvanic potential?
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The purpose of a little toe is to ensure you keep your furniture in the right place.

Joshua
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Re: Auton, The Autonomous Sail Boat

Wed Jul 25, 2012 2:56 am

I think you need to throw a fish finder on here and record where it runs into large schools. How cool would that be?

nabberuk
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Re: Auton, The Autonomous Sail Boat

Wed Jul 25, 2012 4:35 pm

Some very good idea's on here, some things i even had to google as i've never heard of them! :lol:

I like the fish finder idea but i'm not sure what sort of power requirements that would need. o and there around £400!!
the autonomous sailing boat: www.autonboat.com

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Mortimer
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Re: Auton, The Autonomous Sail Boat

Wed Jul 25, 2012 5:44 pm

A fish finder is perhaps overkill and would be difficult to log anything useful from. A simple depth sounder might be easier, but whether it not you'd get any readings far out at sea is another matter.
--------------
The purpose of a little toe is to ensure you keep your furniture in the right place.

nabberuk
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Re: Auton, The Autonomous Sail Boat

Thu Jul 26, 2012 2:39 pm

Think i might have to stick to weather sort of information and perhaps Water salinity.

Should all be pretty low battery drain.


On a side note, i've just installed a new forum :)
the autonomous sailing boat: www.autonboat.com

nabberuk
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Re: Auton, The Autonomous Sail Boat

Thu Aug 09, 2012 6:21 pm

Something i forgot to mention in my OP. This project is open to community involvement, so if your interested in helping out then please let us know!
the autonomous sailing boat: www.autonboat.com

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Jim JKla
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Re: Auton, The Autonomous Sail Boat

Thu Aug 09, 2012 6:46 pm

Give yourself a chance sail via Cape Verde do the rules say you have to go direct.

Also coat your sails out of solar cells and make them dual function.

Light detector put the sensor on the top of the mast (no shadow there).

Polution detector co2 and carbon particulate (diesel produced carbon).
Noob is not derogatory the noob is just the lower end of the noob--geek spectrum being a noob is just your first step towards being an uber-geek ;)

If you find a solution please post it in the wiki the forum dies too quick

nabberuk
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Re: Auton, The Autonomous Sail Boat

Fri Aug 10, 2012 7:43 am

I did look into putting solar cells onto the sail but bendable cells aren't really available.
the autonomous sailing boat: www.autonboat.com

Ravenous
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Re: Auton, The Autonomous Sail Boat

Fri Aug 10, 2012 8:05 am

If the sail was a light rigid aerofoil instead that might work. However that won't work - the sun and wind will usually be in different directions! (Also weight might be a problem.)

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SladerZ
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Re: Auton, The Autonomous Sail Boat

Fri Aug 10, 2012 9:49 am

How are you communicating with the boat in sea?

nabberuk
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Re: Auton, The Autonomous Sail Boat

Fri Aug 10, 2012 10:06 am

SladerZ wrote:How are you communicating with the boat in sea?
It's looking like the only way will be satellite link. But it is rather expensive.
the autonomous sailing boat: www.autonboat.com

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ripzay
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Re: Auton, The Autonomous Sail Boat

Fri Aug 10, 2012 10:50 am

nabberuk wrote:
SladerZ wrote:How are you communicating with the boat in sea?
It's looking like the only way will be satellite link. But it is rather expensive.
How are you intending on doing the satellite link ?

The only way i would know of being able to do this and keep the cost down is to rent a satellite phone and hold it on board the vessel - lots of the modern satellite phones have a USB port on them for data linking.

Just interested that's all!

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SladerZ
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Re: Auton, The Autonomous Sail Boat

Fri Aug 10, 2012 10:57 am

and with this one :

http://en.wikipedia.org/wiki/Single-sideband_modulation

it's possible u think ?

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