Automatic wakeboarding in a pond

[Rick] sent in an awesome project he and his uncle [Charlie] have been working on for this summer. It’s a completely automatic wakeboarding system that tows [Charlie] and company from one end of his backyard pond and back again.

The entire system is supported by two towers at either end of the pond. Strung between these towers is a 420 foot cable that pulls the rider from one end to the other before stopping, and automatically continuing in the opposite direction. Apart from stopping and starting the motor attached to the cable, no user input is required. This means anyone lucky enough to make it to [Charlie]‘s farm can wakeboard all afternoon without a break.

[Rick] posted a few short videos covering the internals of the system. From what we can see, the guys are using a LabJack U3-LV data acquisition unit to grab the speed, direction, and position of the rider. This data is sent to a laptop that controls the motor suspended on one of the towers.

There are a few more videos of this incredibly fun toy available after the break.



Comments

  1. Xeracy says:

    upsides to not living in an urban area…

  2. travisdeyle says:

    Is it “wake” boarding when there is no wake?

  3. HAD says:

    More like: strung between these towers is a 420 foot cable that pulls the rider’s drowned corpse from one end to the other before stopping, and automatically continuing in the opposite direction.

    This build has the potential to go really, really bad.

    • filespace says:

      Yup…this build has the potential to go..FUN….REALLY FUN.

      btw.. you must be this tall to ride..lmao

    • hospadar says:

      I really don’t see what’s so dangerous about this. I guess if are wakeboarding alone (dumb) and somehow get your head jammed into/wrapped around the cable (dumb) you might be in trouble. Do it with a friend sitting next to the kill switch and it’s no more dangerous (and in fact probably much safer) than getting towed behind a boat with a deadly arm chopper (ahem. propeller) attached to it (in a lake full of other arm chopping ski boats).

      • Mike_m says:

        for reference, on a proper ski boat, the prop is under the boat on a straight shaft – either in a V or inline config with the engine. Normal runabout boats are more of the arm chopper variety when they have i/o (stern mount) outdrives. usually not an issue with a skier/wakeboarder/wakeskater, however it is damn near stupid to try and surf behind an I/O boat – we refer to people who try this on the lakes as our future chums.

  4. knightvoyager says:

    Besides possibly getting dragged by the handle, this is an awesome project! They should make the cable go around a larger section like a ski lift so he doesn’t lose speed and sink though.

  5. Pall.e says:

    Did anyone see the mythbuster’s episode where they wakeboarded being towed by a excavator? This reminds me of that http://dsc.discovery.com/videos/mythbusters-excavator-wakeboarding-angle-2.html

  6. addidis says:

    This is great. You could probably start a business charging people for rides. The guy above me is just scared of the awesome sauce. You should probably have some one on the apply named “kill” switch but any one who doesn’t let go probably deserves the darwin award they are about to receive.

  7. barryronaldo says:

    Did this back when I lived in Brunswick, GA. They used to have a place called ski rixen. You would get towed past alligators every now and then lol. It was on St. Simons Island I believe. It was 92 or 94. It seems like they are still in operation, although in FL now. http://www.skirixenusa.com/ It was a lot of fun (but expensive) so the builder should also have tons of fun but at a much better price :) At any rate it is always a challenge to secure things in water and good on the builder to get it all figured out :) Timely too, with the temps climbing!

  8. Mike_m says:

    neat someone did this in their own backyard – cable wakeboarding is actually quite common in europe (where the lakes don not allow normal gas boats), and actually down here in texas we have a cable park as well – http://www.texasskiranch.com. As for safety – even in the commercial cable parks, the handle never stops – think like a j-bar ski lift. you’d have to try pretty hard to get dragged by a tow handle, doubly so if unconscious.

  9. Ren says:

    Safety tip: Close down the ride when lightning is possible.

  10. 0xfred says:

    This sort of cable tow is fairly popular in the UK – normally in a continuous loop rather than one line back and forth. You can also get a commercial setup like this – called System 2.0

    This is a very nice build though. I’ve heard of a few winch setups but never seen a home-build cable setup like this.

  11. filespace says:

    Built in KILL SWITCH……LET GO OF HANDLE
    i mean come on…
    have you guys never been wake boarding/ water skiing

    • FuelCell250 says:

      Haha yeah man, they clearly have never been skiing or wakeboarding. Besides the bit about lightning, there is absolutely no way that this is more dangerous than being towed behind a rope.

  12. Mike_m says:

    yeah, drop handle is the best kill switch – we used to use gas powered winches in all sorts of ponds, definitely no kill switch on those :)

  13. Paul says:

    I wasn’t able to find a picture but, there’s a setup like on a huge lake except in a big polygon in Bratislava at a public park. if you ever go there it’s at the end of the 2 and 4 tram lines through a camping ground.
    never got a chance to go on it, but it looks fun.

  14. Wizzard says:

    Best second project: Add a third tower, use a sinusoidal pull offset on each tower to keep the rider moving between the 3 towers in a semi-circular pattern… No more stop and go!

  15. NsN says:

    Aerial video of a lake waterskiing / wakeboarding facility in germany:
    http://vimeo.com/25288834

  16. SpydaMonky says:

    On the way back did he “jump the goose”? HE JUMPED OVER A GOOSE, legend :)

  17. Rick McNeely says:

    Just so ya know, He does have a remote kill switch on his helmet now. But we’ve found that the best prevention against corpse towing is to hold the rope in your hands, and not tie it around your neck! :-)

    The LabJack reads a quadrature encoder to track speed and distance. It also reads the buttons on the local and remote controls. It also provides a 0-5V speed reference to the motor controller.

    The other USB box is an OnTrak Control Systems USB / relay/IO box. It just provides the motor controller with a direction indication.

    Both devices provide DLLs for interfacing. The software I wrote allows on-the-fly adjustment of laps/speed, start/stop positions, lap distance, stop position(It can drop you off right on the beach), etc.

    I use several languages and platforms at work. For this system, I used PowerBasic. It interfaced easily with the DLLs, has nice built-in communication libraries, and it’s nice and fast. The compiled program is about 75k.

    If I were doing this on a production basis, I might use an embedded controller. But this is a one-off, So I used the systems and tools I had at hand and am comfortable with.

    I will try to post more details on my website (in a couple of days) for anyone who wants. http://www.rickmcneely.com

    Thanks for the great feedback!

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