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View Full Version : Ekos with single FC 3730 outrunner build


b20btec
06-27-2012, 09:26 PM
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

http://i22.photobucket.com/albums/b326/b20btec/f29709a8.jpg

http://i22.photobucket.com/albums/b326/b20btec/eff11ef4.jpg

http://i22.photobucket.com/albums/b326/b20btec/b421eee5.jpg

http://i22.photobucket.com/albums/b326/b20btec/6d620ea0.jpg


http://youtu.be/nXp_RbmiAyU


http://youtu.be/vrsbNFGoRcM
limitedr1
07-04-2012, 02:22 AM
Looks real clean. Nice buld... What did you use for drive and rudder system?
b20btec
07-04-2012, 01:34 PM
Fightercat offset rudder and 3/16 cable
EricSchlaifer
07-04-2012, 04:59 PM
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?
b20btec
07-04-2012, 08:22 PM
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.
b20btec
07-04-2012, 09:36 PM
Pics updates, video will be in the video section shortly.

Link to youtube - http://youtu.be/vrsbNFGoRcM http://youtu.be/nXp_RbmiAyU
EricSchlaifer
07-07-2012, 01:58 PM
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+
b20btec
07-10-2012, 10:16 AM
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.
LarrysDrifter
07-10-2012, 10:30 AM
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.
Rocstar
07-10-2012, 10:43 AM
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.

:popcorn2:
b20btec
07-10-2012, 10:44 AM
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.
b20btec
07-10-2012, 10:47 AM
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.
Rocstar
07-10-2012, 10:51 AM
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!
b20btec
07-10-2012, 11:37 AM
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.