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Old 08-23-2018, 11:57 AM   #581
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Originally Posted by JohnRobHolmes View Post
Lipos are inherently water resistant by nature. The cells have to keep air out and keep volatile solvents in to be a stable battery, the pouches or cells are very well sealed in this regard. Unless the cells are put into an extremely high pressure or low pressure environment, you can consider them water proof. The plug (both power and balance) is the worst of your worries, it will corrode over time if not cared for occasionally with some cleaning and drying. If the battery uses a PCB to terminate the cells, corrosion can cause some self discharge or errors on the charge port. That's really the only worry.
Wow, I've been using Lipos for RC Airplanes for years and I didnt even know that!

Very interesting stuff, thanks for all the info!
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Old 10-27-2018, 11:34 PM   #582
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Question. Ive read motor leads are not much to worry about with waterproofing. I’ve also read that battery plugs/terminals need extra attention for waterproofing. If this is the case, do I have to worry about the bare soldered battery terminals on my “waterproof” esc?
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Old 10-28-2018, 03:32 AM   #583
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Question. Ive read motor leads are not much to worry about with waterproofing. I’ve also read that battery plugs/terminals need extra attention for waterproofing. If this is the case, do I have to worry about the bare soldered battery terminals on my “waterproof” esc?

Exposed motor or battery terminals will work if wet, or even under fresh water, but I'd recommend you cover them with Plastidip, silicone sealant, dielectric grease etc. to reduce corrosion over time, especially if underwater: Have a look at 16:40 into this underwater test video I did: https://www.youtube.com/watch?v=ilHMydlW7j0 . . . you can see bubbles coming off the exposed Deans plug!

Beware salt water. Well, just don't go near salt water with your RC as it'll corrode it to death. To be honest putting your RC into any sort of water will cause corrosion metal parts and no matter how much marine grease you pack bearings and axles with the water will get in eventually, so submerge at your own risk!
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Old 10-28-2018, 07:22 PM   #584
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Wow, pretty cool video. Thanks for the info. I’ve been using a liquid electrical tape. I just filled the bec shrink wrap with it and filled the sensor port on my motor for now. (Until someday I get a sensored esc) I’ll use it on the battery terminals on the esc. But in the plugs I’ll use dielectric grease.
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Old 10-31-2018, 09:39 AM   #585
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Wow, pretty cool video. Thanks for the info. I’ve been using a liquid electrical tape. I just filled the bec shrink wrap with it and filled the sensor port on my motor for now. (Until someday I get a sensored esc) I’ll use it on the battery terminals on the esc. But in the plugs I’ll use dielectric grease.

When you go sensored, make sure you waterproof the hall-effect sensors in the motor : https://youtu.be/wS_WyUEdO50?t=897 (due to the harsh environment and temperature changes I recommend epoxy for this, not liquid electricl tape, Plastidip or conformal coating).
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Old 02-01-2019, 06:30 AM   #586
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I wrote this for our servos, because despite them having 13 o-rings, the words waterproof never cross my lips. I believe you may find something useful regarding making your servo more water resistant if you read it.


https://www.promodeler.com/askJohn/W...ater-resistant


My 2˘
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Old 02-12-2019, 03:28 PM   #587
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Just a quick tip I found to work for my electronics. You can cover stuff in rubber cement to waterproof it. I have used it on receivers and mini ESC's Just make sure you don't miss a spot or two, It's really hard to see where it is and isn't when you apply it.
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Old 02-24-2019, 11:52 AM   #588
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Default Re: Water Proofing Electronics

Good writeup John. We have found that moisture will readily travel down the wire jackets as well. Putting some grease at the PCB where the wire jackets stop will put a halt to it for a while, but moisture just hides and waits between the wires and insulation. Multistrand wire is particularly good at being a conduit of water.
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Old 03-08-2019, 01:15 PM   #589
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So, back on page 12 I saw a question about using a small pelican case as an electronics box (a cheaper, easier to repair option over all these dips and epoxies. I do not have any pictures of what I did (which is a good thing because it wasn't pretty). I used a dremel to cut a slot long enough to lay all 4 channels and the battery leads side by side. After feeding them all through, I sealed the slot with sealing caulk, then very carefully sliced off an eighth inch of sheathing from every wire and poured white glue in until the unscripted wire was submerged. Keeping the wires taut while it dries kept them apart, and then a final coating of caulk to keep the wires in place if the glue did get wet. It worked very well for an actual ROV submersible for 6 months.
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Old 04-17-2019, 02:50 PM   #590
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Any tips to waterproofing our transmitters during rainy weather crawls? I'm getting pretty tired of walking around with a clear grocery bag around my hand
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Old 04-26-2019, 07:27 AM   #591
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Any tips to waterproofing our transmitters during rainy weather crawls? I'm getting pretty tired of walking around with a clear grocery bag around my hand
Depends on your transmitter type (pistol or stick), quite a few options for sticks e.g. this waterproof warmer with clear window? I got a Turnigy one from HobbyKing a couple of years back, but their version is discontinued now.


Last edited by 4WheelRC; 04-26-2019 at 07:30 AM.
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Old 04-26-2019, 11:03 AM   #592
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Depends on your transmitter type (pistol or stick), quite a few options for sticks e.g. this waterproof warmer with clear window? I got a Turnigy one from HobbyKing a couple of years back, but their version is discontinued now.



Waterproofing sticks is easy, but I only roll with pistol grips for my surface rc's.
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