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Old Jul 15, 2015, 06:12 AM
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waterproofing electronics for seaplanes and flying boats

Hey all,
First time posing in the Scratchbuilt forum. Sorry I know this is a bought kit but I know these were originally built here in this forum and I did a couple searches on this and didn't find anything,....I just finished building a hydrofoam type flying boat that I bought on the classified forum. It was a kit and the instructions really sucked. No text, all bad grainy pics. I got it all built and I'm struggling with a couple things. First is how to waterproof the electronics bay or the individual components,.ie the servo's, speed control ect. The second is CG. The instructions said 50 mm from leading edge of the deck which to me seems impossible since the electronics bay is behind the CG line. I've got a Emax 2822 1000kv motor swinging an 8X4 slow fly prop and a 1000 ma 3S battery and three 5 gram servo's. Does this CG sound too far forward? Any help or insight anyone may give me would be much appreciated. Thanks all,
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Old Jul 15, 2015, 07:48 AM
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Don't know about CG for that, haven't built one. However, for waterproofing electronics, i use CorrosionX. Some auto parts stores sell it, or try boating stores, or online. It is available in aerosol can or hand sprayer. I bought the latter, poured some in an eyedropper med bottle. I dribble it into the shrink wrap of ESCs from one end til it comes out, then from the other till it comes out again. For RX i open the case and wet all the components. Same for servos. Haven't had problem with any water plane after treating them. (And i toasted a couple ESCs before finding CX.)
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Old Jul 15, 2015, 08:16 AM
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thanks, I'll see if amazon has it.
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Old Jul 15, 2015, 10:59 AM
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flitetest did an episode on water proofing electronics that might help

Flite Test | Waterproofing Electronics (18 min 20 sec)
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Old Jul 15, 2015, 02:48 PM
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I put the stuff in a condom. Always works.
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Old Jul 15, 2015, 04:20 PM
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As far as the CG goes, 25% back from the leading edge of the flying surface is a good place to start. You basically have a pizza box flier with floats attached, 25% is the CG of all these type fliers.
Corrosion X is what I have for waterproofing too.
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Old Jul 15, 2015, 07:15 PM
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Thank you all!! This forum is the best!! I have some CorrosionX on the way!
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Last edited by oceanway99; Jul 15, 2015 at 07:40 PM.
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Old Jul 15, 2015, 10:23 PM
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Hello all ; CX is the way to go . I,after reading some of the write ups about it, just dunked my stuff. Thing is, give it at least over night to dry. "Motor and all.
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Old Jul 16, 2015, 08:05 AM
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http://www.plastidip.com/home_soluti...FO=Liquid_Tape
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Old Jul 16, 2015, 06:16 PM
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I'm going to try plastidip next. Corrosion x smells bad and is messy it is also to slippery for mounting with Velcro.
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