Homebuilt ROVs Forum

well that settles it then! I know what i am doing this weekend. I am going to track down a fish tank, make some salt water, and test some Brush less motors!
I will post my results on here!

Hey there,

This is what I found for the brushless:
http://www.wattflyer.com/forums/showthread.php?t=41694

here, with an interesting solution: http://www.kickstarter.com/projects/ope ... ater-robot
more about it here: http://openrov.com/forum/topics/seawate ... ess-motors

So in my understanding, it seems possible to do it for use in salt water..
I keep digging

Have a great day

Alain

KR2_Diving wrote:well that settles it then! I know what i am doing this weekend. I am going to track down a fish tank, make some salt water, and test some Brush less motors!
I will post my results on here!

Thanks for doing those testing for us....

Regards
Wanderer

You can run brushless in salt water. Wash with fresh after your dive, compressed air to dry them out and then spay a non conductive lubricant on them when you store the ROV. OPEN ROV uses them on all thier builds.

Hey All!
Test results are in!
Brushless motor ran in salt water just fine!

I will post pics and details soon... but the results are pretty clear!

No fireworks! (bummer i know...)

Quick preview of results:
Current Draw
---------------
Medium: Full FWD : Full REV : MAX current
Air: 0.77 : 0.77 : 1.47
fresh h2o: 3.5 : 3.8 : 4.03
salt h2o: 3.7 : 4.05 : 4.08

Summary:
Works just fine in salt water, but there is a bit more current draw.
All tests were without prop!

Will post a more detailed thread in the THRUSTERS section later this weekend!

Ryan "KR2_Diving"

KR2_Diving wrote:Hey All!
Test results are in!
Brushless motor ran in salt water just fine!

I will post pics and details soon... but the results are pretty clear!

No fireworks! (bummer i know...)

Quick preview of results:
Current Draw
---------------
Medium: Full FWD : Full REV : MAX current
Air: 0.77 : 0.77 : 1.47
fresh h2o: 3.5 : 3.8 : 4.03
salt h2o: 3.7 : 4.05 : 4.08

Summary:
Works just fine in salt water, but there is a bit more current draw.
All tests were without prop!

Will post a more detailed thread in the THRUSTERS section later this weekend!

Ryan "KR2_Diving"

Hey Ryan,

Good news!! Thanks for doing that!
Now what's going to be interesting is how do those brushless motors are affected in the long time...
What have you done after the test? Flushing the engine that's all?
Have a nice day

Cheers
Alain

Results are posted in the Thrusters Pages.
viewtopic.php?f=3&t=874

Including links to videos and pictures.

Best of Luck to all the builders out there!

Ryan "KR2_Diving"

KR2_Diving wrote:Results are posted in the Thrusters Pages.
viewtopic.php?f=3&t=874

Including links to videos and pictures.

Best of Luck to all the builders out there!

Ryan "KR2_Diving"

Thanks again Ryan!