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  • Teakgate


    MartinArcher
    • Year: 1987 Brand: Malibu Model / Trim: Sunsetter Device Type : Hinged Gate Style Surf Device Material: Teak Control: Powered with Automated Controller Cost: $1500-$1999 Platform Type: Teak

    Owning a 1987 Malibu Sunsetter has been a fun venture.  I really enjoy slalom skiing but another fun watersport we have enjoyed is surfing.  When owning a direct drive you learn surf on a less than massive wave.  I decided to add gates to the boat after experimenting with some fixed gates and being very happy with the results.  The issue with manual gates is a boat this size is very difficult if not impossible to turn against the gate that is out.  I quickly realized that an automated solution would be needed if we wanted to continue running gates.  This would allow the gates to retract as the boat came off speed )or exceeded a high speed limit) and deploy as the boat reached surf speed.  I also has many other ideas up my sleeve when I kicked off the project including controlling the gates wirelessly from the wave to allow the rider to control the surf side and initiate transfers as they wished.  The project took my about four weeks. It turned out to be a lot larger project that I originally had thought, but then again I kind of went all out with it.  

    I built the gates from teak wood and used 2" stainless bar to fasten them together. I polished all the stainless to a mirror finish including the hinges. The amount of time I have in polishing is insane. 

    The side of the boat is pretty close to a 17 degree angle. When designing the gates I realized that that 17 degrees would be a bit much to lean the hinge line over to. With a 17 degree from vertical hinge line the end of the gate would rise almost 6 inches. I designed a wedge block to go between the gate and the hinge line to reduce the hinge angle to 9 degrees. This brings the gate elevation change to 2-3 inches. It also allows the actuator mounting point to be under the teak deck. At a 17 degree angle, the actuator angle was so great the transom mount would end up above the teak deck....not good.

    I designed the gates to be level with the teak deck when stowed and then "dig" a bit deeper when deployed. The gates stow at 27 degrees and deploy to 30 degrees. This 57 degree swing is accomplished using Lenco 102 actuators. When designing the angles and mounting points of the gates and actuators, I realized that the actuators mounting point on the transom would need to be exactly where the swim platform was.  I came up with a solution by welding the existing swim platform brackets to a larger 1/4" aluminum plate that would offset the bracket toward the center line of the boat. This also allows the actuator to be mounted to the aluminum plate. I had them powder coated along with the brackets that mount on the platform. The finish turned out great.

    The gates had to be cut with several angles, it is probably best to let you look at the pics instead of describing the angles in text.

    I mounted the gates to the transom and the new brackets along with the actuators. The meant drilling 14 new holes in the transom per side. That's right, there are 28 new holes in the boat! You can rest assured they are very well sealed with 3M 4200. I also had to do gel coat work on the transom where the swim platform brackets mount. The old brackets were mounted with 4200 and required a lot of scraping to remove. It also pulled a few small bits of gel off the transom. I re-gel coated the area so the new brackets would have a good surface to seal to. All holes were pilot drilled in reverse and then over drilled the OD of the screws being used through just the gel, and then countersunk to prevent any gel cracking.

    As for the control, I designed and build a custom controller to run the gates.  it has the following features...

    1.  GPS Receiver for speed input

    2.  Speed based gate control (deploys between 7-13 mph by default but is configurable)

    3.  In boat 3 way gate switch control

    4.  Wireless gate control from the wave with a wireless remote worn by the surfer

    5.  GPS speed output for converting paddle wheel cruise systems to GPS.

    6.  4 Line LCD Display (shows # Satellites locked onto, speed, actuator currents, surf status)

    7.  Maintenance Mode to allow controlling the gates on the trailer for testing, boat waxing, etc.

    I sell these controller under a company called Wake Logic Limited.  You can drop me a line about the controller at matt@wakelogic.com.

    The gates are finished with Star Brite's Tropical Teak Sealer. The wood turned out beautifully and really shows off the grain and knots in the wood. I also cut compound angles in the teak platform to match the gates when stowed and finished the fresh cuts with the same teak sealer. I remounted the teak deck and it now comes right on and off the mounts.

    Well here are the pics of the project….

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    Here's a video of the gates in action.

     

     

    Here are some pics of the wave after I got the boat in the water.  I put 300 lbs in the locker, and about 500 lbs on each side of the dogbox for this run.  I have since learned that a 750 on the regular side give just a bit of list and a bit better wave on the regular side.  The goofy side on a Mabu is really good due to prop rotation so this balanced out the wave nicely.  In these pics we had the weight mentioned above and 5 passengers on board and me on the surf board.  At rest, the boat sat perfectly level (with dual 500’s). Any listing in the pics is from the gates.

    I have the gates set up to deploy at 7 mph. If the speed exceeds 12 mph they go back to the stow position. If the speed drops below 7 mph they go back to stowed. I also set up my switch bank to allow the surf side to be swapped while underway.

    Here is what I noticed while behind the boat....

    1. The wave is as good with my new gates if not a bit better than my prototype gate from the Poorman's Surfgate thread.

    2. With the prototype gate, I had to weigh the surf side a bit heavier than the non-surf side to get the same wave I had last night.

    3. I had two more people last night than I ever had running the prototype gate.

    4. The wave is longer, cleaner, and has a lot more push than our non-gated wave.

    5. I finally tried surfing goofy - the wave is actually really good without moving a single person or bag.

    6. It takes about 4-5 seconds to switch from one side to the other.....on an 87' Sunsetter. 

    7. I'm pretty darn happy with the wave....especially considering it's a 25 year old direct drive.

    8. Stow the gates, set the Perfect Pass for 30 and enjoy a slalom run back to the dock with no disturbance to the wake whatsoever.

    Now for the good stuff....

    Here's the wave this spring in April with no gates and just listing. Me wearing the same wetsuit. 300lbs in the locker, 800lbs on the surfside, and 4 people in the boat (3 on the surfside and 1 driver).  Both gated and non-gated waves has the floating wedge down.

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    All other pics are with the Teakgates….

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    Some arial footage of the gates in action....

     

     


    User Feedback

    Recommended Comments

    Rugger

    Posted

    One of the original and best implementations of DIY gates to date.  Shows you what old school boats are capable of and shows off some pretty frickin' slick engineering on your part.   I remember when you were going through the process.   Thanks for sharing the results.   

    • Like 1
    Number9

    Posted

    Fantastic.  Have you updated your Wake Logic controller?  I don't know that it needs anything but just curious how it has evolved.   

    • Like 1
    MartinArcher

    Posted

    The biggest change to the system has been the wireless controller.  I have eliminated the need to use a wrist strap to protect the remote from the water.  It is now simply a keyfob sized remote with a wrist strap that floats the remote of it is ever dropped.  It allows you to keep the remote in your hand and easily feel the buttons with your thumb so you don't have to look down at the remote which makes throwing those transfer tricks a little easier while keeping your eyes up.

    • Like 1
    Russell

    Posted

    Hello Martin,

    Its been a while since I’ve spoken with you about boat-stuff.  I just looked at your write-up on your boat from a few years ago.  It inspired me to start thinking about improving my wake and automated surf system.  I have my same 1999 Sport Nautique direct drive.  I may be running more ballast since I last chatted with you.  I’m running about 850 lbs in my single rear trunk.  It’s evenly weighting the trunk.  I’ve added about 450 in my ski locker, in front of my motor.  The difference is recognizable, but not profound.  I run my Mission Delta device, and the “surf side” is definitely cleaned-up.  Currently, there’s not a chance of surfing in the traditional sense (surfboard). My wake is nowhere big enough for that, particularly without the rope.   That’s actually ok since we foilsurf.  I’ve had the opportunity to foil behind a few other boats that produce noticeably bigger wakes.  Guilty confession; I prefer the bigger wake to my smaller one.  I’m curious if in your progressions, you have any advice that may aid me in my quest.  By hook or by crook, I’m going to come-up with an automated surf system, run by your controller.  I just can’t stop the over analysis-paralysis on which path to take.  The consensus on Wakegarage is that vertical deployed tabs need more ballast than I’m able to give.  I don’t want sacks on the floor or back seat of my already cozy boat.  Maybe lead under my trunk ballast would help.  I like the idea of NSS, but Max on Wakegarage says I don’t have the space I need for his NSS kit.  My Mission Delta does as advertised, which should tell me to just build automated gates.  Your boat seems to have worked well with gates.  Would you have anything that would help me break the cycle of habitually reading about the various approaches to automated surf systems, and moving forward?

     

    I am fully aware of the limited ballast I can run, and the limited size of wake I’m going to be able to safely achieve.  Wakegarage seems mostly comprised of V-drive owners who have an advantage with ballast and where their motors already live and throw weight in the back of their boats.  I’ve read a handful of dd owners who’ve gone with gates, due to the ease of building and probability of success.

    Thanks in advance, should you indulge me.

    MartinArcher

    Posted

    I would guess our boats weight similar weights without ballast and both ski very well which makes generating the wave you see above a challenge and one you have to make a few sacrifices to get.  As you can see, I am running ballast on the floor of the boat.  If I were to try and keep it all out of sight we would have to sell the boat and buy a V-drive to surf.  I love to slalom ski and also enjoy foil surfing a lot so I want a boat that can "do it all" and know the v-drive wakes will really disappoint when I put the slalom ski on.  For you info, I'm running a 750 on the surf side of the engine, a 500 on the goofy side, and a 300 in the locker.  It sounds like I'm not really running too much more weight than you are but we normally run a crew of at least 4 which helps a lot.  You figure that's at least another 600lbs.  The bummer is you can't cheat physics and like the hot rod guys say, "there's no replacement for displacement" and displacement happens with more weight.  I think a true gate will give you a bit better results than you are seeing with you mission delta.  My buddy has one on his Nautique V-drive and it works as advertised but I feel a bit bigger gate positioned at the transom would do a bit better.  We all enjoy a ride behind a bigger boat with a bigger wave but at the end of the day, if you want to keep the boat your in the best thing to do is to make it what you want.  After chatting with you, I think foiling would be a blast with an automated gate system on your boat and maybe a few more people in the boat or another way to add a few more hundred pounds.

    Russell

    Posted

    EHello Martin,

    Its been a while since I’ve spoken with you about boat-stuff.  I just looked at your write-up on your boat from a few years ago.  It inspired me to start thinking about improving my wake and automated surf system.  I have my same 1999 Sport Nautique direct drive.  I may be running more ballast since I last chatted with you.  I’m running about 850 lbs in my single rear trunk.  It’s evenly weighting the trunk.  I’ve added about 450 in my ski locker, in front of my motor.  The difference is recognizable, but not profound.  I run my Mission Delta device, and the “surf side” is definitely cleaned-up.  Currently, there’s not a chance of surfing in the traditional sense (surfboard). My wake is nowhere big enough for that, particularly without the rope.   That’s actually ok since we foilsurf.  I’ve had the opportunity to foil behind a few other boats that produce noticeably bigger wakes.  Guilty confession; I prefer the bigger wake to my smaller one.  I’m curious if in your progressions, you have any advice that may aid me in my quest.  By hook or by crook, I’m going to come-up with an automated surf system, run by your controller.  I just can’t stop the over analysis-paralysis on which path to take.  The consensus on Wakegarage is that vertical deployed tabs need more ballast than I’m able to give.  I don’t want sacks on the floor or back seat of my already cozy boat.  Maybe lead under my trunk ballast would help.  I like the idea of NSS, but Max on Wakegarage says I don’t have the space I need for his NSS kit.  My Mission Delta does as advertised, which should tell me to just build automated gates.  Your boat seems to have worked well with gates.  Would you have anything that would help me break the cycle of habitually reading about the various approaches to automated surf systems, and moving forward?

     

    I am fully aware of the limited ballast I can run, and the limited size of wake I’m going to be able to safely achieve.  Wakegarage seems mostly comprised of V-drive owners who have an advantage with ballast and where their motors already live and throw weight in the back of their boats.  I’ve read a handful of dd owners who’ve gone with gates, due to the ease of building and probability of success.

    Thanks in advance, should you indulge me.

    Russell

    Posted

    I’m stoked to hear you’re foiling!  I can’t get enough of it.  Boating season is still off in the distance.  I’d like to get my solution going before the season is upon us.  I mocked-up an NSS type of device.  I didn’t have it secure when I tested it last season.  It pivoted out of position when I attempted a test run.  I got a little disenchanted, and haven’t tried again with it.  If that proves to be fruitless, I’ll try a surfgate.  I was hoping that maybe I didn’t need too much more ballast, but that’s probably wishful thinking.  I noticed you do have a lot of sacs in your boat.  I’m likely not wanting to give up floor and rear seat for building more wake size.  I could wrap my head around lead in the trunk.

     

    Maybe my wife will green light our next boat before I have to do undesirable things to our current one...

     

    Thanks for your wisdom,

    Russ



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