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Thread: Ekos with single FC 3730 outrunner build

  1. #1
    Join Date
    Aug 2011
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    Default Ekos with single FC 3730 outrunner build

    While working on my fc cheetah hull I decided to slap this one together also. FC Cheetah is on hold awaiting paint and esc decision. I wanted a low cost build but it still cost a bit of money. I bought a bare ekos and did the build rather quick kinda like my first build.

    Build List:

    Venom C1 34" Hull Bare
    Epoxied existing Factory Holes
    Seak King 180A
    5.5 Bullet Connectors & Heat Shrink
    Velcro
    Flysky FS-GT3B
    Turnigy 3S 5000 MAH Lipo x 2 - Series
    Fightercat 3730 1600KV
    Fightercat Carbon Universal Motor Mount
    Fightercat 6MM-3/16 Collet
    Traxxas 2075 Waterproof Servo
    Fightercat Aluminum Servo Mount
    Kintec Racing 3/16 Drive Cable
    Kintec Racing 9/32 Stuffing Tube with Teflon Liner
    K&S Brass Tube 5/16 - I can replace stuffing tube if needed
    Kintec Racing 9/32 Stuffing Tube Bracket
    OSE 3/16 Drive Dog
    Octura M445 BC Prop
    Fightercat 3/16 Small Bullet Nut
    OSE Large Inlet
    OSE Large Outlet X 2
    Kintec Racing Aluminum Y Fitting
    Kintec Racing 1/8 ID Coolant Hose
    Kintec Antenna Tube - Green
    Kintec Racing Antenna Mount
    4-40 Linkage
    Dubro Quick Connect
    Kintec Racing 2mm Linkage adapter drilled to fit 4-40
    Aquacraft Linkage Boot
    Fightercat Offset Rudder











    Last edited by b20btec; 07-10-2012 at 10:51 AM.

  2. #2
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    Default

    Looks real clean. Nice buld... What did you use for drive and rudder system?

  3. #3
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    Default

    Fightercat offset rudder and 3/16 cable

  4. #4
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    Default

    Hi, looks really good. I have a ekos hull with crash damage (easy repair) and I am planning to turn it into a single like this. Can you post a picture of the offset rudder setup? I'm not sure if I want to go offset or inline yet and would love to see how yours turned out. Have you run this setup yet?

  5. #5
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    I'll post a pic and I'm going to upload a video. This setup cruises at a cool 62 mph.

    Yes I have, it's pretty freaking fast. I have a few boats and this setup is my favorite for single. I have. Mg on 6s that runs in the mid 50s and it can't keep up with this.

  6. #6
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    Pics updates, video will be in the video section shortly.

    Link to youtube - http://youtu.be/vrsbNFGoRcM http://youtu.be/nXp_RbmiAyU
    Last edited by b20btec; 07-05-2012 at 08:27 AM.

  7. #7
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    Quote Originally Posted by b20btec View Post
    Pics updates, video will be in the video section shortly.

    Link to youtube - http://youtu.be/vrsbNFGoRcM http://youtu.be/nXp_RbmiAyU
    Looks sweet! I'm digging the offset rudder. Now that I see it I think its worth the PITA to move the servo to the other side! Nice to know the hull is stable at 60+

  8. #8
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    Yeah loving it with the offset rudder, some may disagree, but how can it not help....you don't have a rudder blocking your backwash anymore.
    Last edited by b20btec; 07-10-2012 at 10:40 AM.

  9. #9
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    Better make sure the fake exhaust ports are sealed and not loose. Mine nearly fell out on their own. That motor is a torque monster too...they run well. One thing Id do is ditch the cooling "Y". Youll get more water to the motor and esc. Cool the esc first, then the motor mount, or omit the mount cooling, since it does basically nothing anyway. Nice build.

  10. #10
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    I just ordered that motor for my FC Daytona. Like Larry said, get rid of the Y. Water flow will take the path of least resistance and it looks like your ESC water line is longer then the motor line, so you may not be getting much cooling to the ESC...Looks good. Post a vid if you can.

    "There's nothing else I really want to do other than get up and build boats." - Mike Fiore

  11. #11
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    Quote Originally Posted by LarrysDrifter View Post
    Better make sure the fake exhaust ports are sealed and not loose. Mine nearly fell out on their own. That motor is a torque monster too...they run well. One thing Id do is ditch the cooling "Y". Youll get more water to the motor and esc. Cool the esc first, then the motor mount, or omit the mount cooling, since it does basically nothing anyway. Nice build.
    The fake exhaust is pretty sturdy but not the windshield, it blew off but into the hull, which was a blessing. You're probably right about the "Y", my first time trying it and it does seem to run hotter than a single watercool line setup. It's one of those things you learn by trying...at least I can make a legitmate comment to someone else because I've been there also. I'm going to swap it to single and take a temp reading.

  12. #12
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    Lines are close to length, it wraps to the back of the hull...cant really see it in the pic . Video is posted, it's linked under one of these post.

  13. #13
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    Quote Originally Posted by b20btec View Post
    Lines are close to length, it wraps to the back of the hull...cant really see it in the pic . Video is posted, it's linked under one of these post.
    Completely missed that, thanks. Runs strong!
    "There's nothing else I really want to do other than get up and build boats." - Mike Fiore

  14. #14
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    Quote Originally Posted by Rocstar22 View Post
    Completely missed that, thanks. Runs strong!
    No problem, I went ahead and linked the video. The FC 3730 seems to be a lot of power, more than needed.

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