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11-13-2006, 04:15 PM
| #1 |
| Diggin' the new SCX10 II!   Join Date: Mar 2004 Location: Norcal
Posts: 11,402
|  Spectrum DSM radios don't work under water?
I have seen many videos with crawlers submarined under water driving. Have any of you guys tried it with a DX3 radio and receiver? I tried it yesterday and found out how quickly miss piggy turned into a boat anchor. It would drive into the water fine, but once it was submerged it completely stopped working, and once I pulled it out of the water it started working fine again. I am going to throw in my FM receiver and try it again. Here is miss piggy being winched out by Dean.         Last edited by badger; 11-13-2006 at 04:19 PM. |
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11-13-2006, 04:18 PM
| #2 |
| RCC Addict Join Date: Jul 2006 Location: So Cal USA
Posts: 1,109
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Dang Newbie....you'll learn...lol John |
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11-13-2006, 04:22 PM
| #3 |
| I wanna be Dave Join Date: Apr 2004 Location: SoCal
Posts: 5,027
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No I don't think the older receivers are "water resistant" But I believe the pro version is. |
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11-13-2006, 04:24 PM
| #4 |
| I wanna be Dave  Join Date: Dec 2005 Location: Happiness is a warm AK.
Posts: 12,563
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Great series of pics!  |
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11-13-2006, 04:26 PM
| #5 |
| I'm a stupid C U N T! Join Date: Jun 2005 Location: In the Garage!
Posts: 4,307
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makes sence, hi frequency waves dont penatrate dense things well, kinda the same way red light penatrates better than blue. you should get more range under water with the FM setup, but even RC subs run the're antenna on a float to keep it above water. In addition the DSM wire being so short its already 4-6 inches further under water than the FM counterpart.
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11-13-2006, 04:26 PM
| #6 | |
| Rock Crawler Join Date: Aug 2005 Location: White Lake
Posts: 764
| Quote:
If you go threw them real quick its like it comming out of the water or going in the water !!!
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11-13-2006, 04:29 PM
| #7 | |
| Diggin' the new SCX10 II! Join Date: Mar 2004 Location: Norcal
Posts: 11,402
| Quote:
Even though everything was completely water proof I could literally hold the throttle at full above water spinning the tires, then dunk it under water and it would come to a stop, like it had no radio signal at all. Once I pulled it back out of the water the rig would work fine again. Again, let me make myself clear, no radio equipment was hurt during this experiment. | |
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11-13-2006, 04:52 PM
| #8 |
| MODERATOR™  Join Date: Jul 2004 Location: Ohio
Posts: 18,928
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Scroll really fast up and down and they're dancing! And well crap, I was about to waterproof the whole rig til I read this. So, you can hit the gas above water and it's fine, dunk it in the water and it'll stop, then lift it back out and it'll run? Major dud. |
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11-13-2006, 04:54 PM
| #9 | |
| I wanna be Dave Join Date: Apr 2004 Location: SoCal
Posts: 5,027
| Quote:
Range is definately an issue with the spektrum signal. I think 300 feet is about max and that is nowhere near the range of a good FM signal. Most racers that do land or water speed trials won't use spektrum because of this. I have seen this happen first hand at the world's fastest challenge a couple months ago, and again last Saturday at the LA SAW boat race. Water makes it more difficult for the signal to travel, so I'd say that is likely the problem. | |
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11-13-2006, 04:58 PM
| #10 | |
| MODERATOR™ Join Date: Jul 2004 Location: Ohio
Posts: 18,928
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11-13-2006, 05:01 PM
| #11 | ||
| Diggin' the new SCX10 II! Join Date: Mar 2004 Location: Norcal
Posts: 11,402
| Quote:
Quote:
I can't believe that a complete newbie such as myself has to find this out first on RCC.  | ||
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11-13-2006, 05:09 PM
| #12 | |
| owner, Holmes Hobbies LLC  Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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I agree with the wavelength not passing through water, being how dense it is. It will just reflect right off the surface. | |
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11-13-2006, 05:17 PM
| #13 | |
| I wanna be Dave Join Date: Apr 2004 Location: SoCal
Posts: 5,027
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Here's one for you, While at I-Hobby inside the convention center I was tooling around just fine with the 2.2 when all of a sudden the rig stopped and continued backward at slow speed until I shut it off. Turned it back on and it was fine. Only happened once with that rig. Later that day and throught the weekend my Super would do the same thing but it happened SEVERAL times. I was told it was likely due to the fact that the older RX's had the antennae (sp?) wire routed between the boards in the receiver. Well I was real worried that I'd have this problem at our Oct comp, but didn't have time to check because I got my rigs back the morning of the comp. It has not happend at all in either rig at the 2 comps we have had since Chicago, and NOTHING was changed. Weird Last edited by Rockpiledriver; 11-13-2006 at 05:19 PM. | |
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11-13-2006, 05:24 PM
| #14 |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Maybe a cordless phone or wireless camera system interfered?
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11-13-2006, 05:27 PM
| #15 |
| I wanna be Dave Join Date: May 2006 Location: Arlington, VA
Posts: 3,377
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i hope you had the winch line allready hooked up before heading into the deep blue. do yall do anything to the motors before dunking?
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11-13-2006, 05:30 PM
| #16 | |
| I wanna be Dave Join Date: Apr 2006 Location: FLAGSTAFF
Posts: 3,728
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back in the day we used to break in all new motors by directly hooking to a 6v battery and dipping them into a glass of water. nice way toset brushes | |
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11-13-2006, 05:44 PM
| #17 | |
| I wanna be Dave Join Date: Dec 2005 Location: Happiness is a warm AK.
Posts: 12,563
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11-13-2006, 05:47 PM
| #18 | |
| MODERATOR™ Join Date: Jul 2004 Location: Ohio
Posts: 18,928
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Underwater driving not being a factor, nothing beats the Spektrums for glitch free operation. The fact they operate outside of the normal RFI/EMI frequencies is reason enough to me to run the DX3. | |
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11-13-2006, 05:49 PM
| #19 | |
| Diggin' the new SCX10 II! Join Date: Mar 2004 Location: Norcal
Posts: 11,402
| Quote:
Like rockwerks said, brushed motors work fine under water. | |
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11-13-2006, 05:50 PM
| #20 | |
| Diggin' the new SCX10 II! Join Date: Mar 2004 Location: Norcal
Posts: 11,402
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Linear Mode
