My progress, and a water cooling mod

This is the building forum for the Combat Boat 90. This is an exclusive forum for contributors. By contributing the equivalent of 15 Euro, you get access to this forum which contains extensive instruction material, tons of pictures, STL's and other stuff.
Torandi
Posts: 8
Joined: Wed Mar 28, 2018 4:38 pm

My progress, and a water cooling mod

Postby Torandi » Thu May 31, 2018 7:52 pm

The parts printed easily on my prusa i3 mk2, and I mounted them pretty quickly.
I ran into some issues getting the engine axis to line up perfectly with the drive shaft, but solved it eventually.

My biggest issue was that the coupling on the shaft constantly came loose as soon as I applied any engine torque.
My solution to this was to flatten one side of my drive axis with a dremmel, and modify the coupling a bit.

I also came up with a better (in my opinion, not yet tested in anything other than bath tub) solution for the cooling, taking the cooling water from the jet outlet.

I run two of these engines, https://hobbyking.com/en_us/2040sl-4800 ... ooled.html, so I modified the engine mount to fit them.

Video of my working boat with water cooling: https://youtu.be/cD_2HRyeXrE

I'll post my modifications in the STL part of the forum.

admin
Site Admin
Posts: 138
Joined: Thu Jan 11, 2018 7:46 pm

Re: My progress, and a water cooling mod

Postby admin » Sat Jun 02, 2018 3:31 pm

Really nice, if you have any pictures of the parts and the process would be nice to see! :)

Torandi
Posts: 8
Joined: Wed Mar 28, 2018 4:38 pm

Re: My progress, and a water cooling mod

Postby Torandi » Mon Jun 04, 2018 12:32 pm

Unfortunately I didn't take any progress pictures.
But here are some pictures of the modified parts.

Water Outlet:
Image

Modified Coupling:
Image

Modified engine mount:
Image

admin
Site Admin
Posts: 138
Joined: Thu Jan 11, 2018 7:46 pm

Re: My progress, and a water cooling mod

Postby admin » Mon Jun 04, 2018 3:00 pm

4800-2040sl.gif
4800-2040sl.gif (86.15 KiB) Viewed 573 times
Nice! I add a picture of the motor just in case for those who don't click on the hobbyking link. Really good price for that motor as well I must say!

Dutch
Posts: 2
Joined: Sun Jul 22, 2018 7:55 pm

Re: My progress, and a water cooling mod

Postby Dutch » Sun Oct 21, 2018 10:55 am

Hi
I think you did some wunderfull things here and i bought the same engines/motor as you have.Even the ESC are the same i think :)
I am hoping to finish my boat soon enough to get her running at a fair here over in Germany.
I have some qustions though:

Do you have to "program"the ESC so that the engine/motor is running forward and backwards?(i have motors from Robbe/roxxy and they had to)

The colors of the cables are driving me crazy because i am oldfashion and BL is new to me,so can you help me perhabs by saying what color goes for what?

The engine has Blue-Yello-Orange and the ESC has Black-Purple-Red.
I know that one of them is the signal cable,but wich one?
And wich one are + and - on the engine?

Many questions i know but still hoping you can help me?

Thanks John

Dutch
Posts: 2
Joined: Sun Jul 22, 2018 7:55 pm

Re: My progress, and a water cooling mod

Postby Dutch » Sun Oct 21, 2018 2:06 pm

My problem is solved :D :D :D


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