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Home✈️Aircraft🚁Helicoptere-MikadoLogo 500 › Grounding the boom to the RX or Vbar?
05-08-2013 05:52 PM  6 years ago
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smittylube

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Santa Cruz, CA

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Grounding the boom to the RX or Vbar?
Can I ground the boom to an empty negative terminal on the vbar or RX instead of directly to the battery wire?
I would still have the normal connection to the motor plate, tail case etc.
Anyone tried this yet?
RPM is your friend..................................until you crash
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05-08-2013 06:49 PM  6 years ago
michael88997

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Lewisville,Tx

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All I did was ground my motor mount to the boom and never had any problems... which version do you have?
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05-08-2013 06:50 PM  6 years ago
Ronald Thomas

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Gainesville, Fl, USA

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Just go to the motor plate.....not to the electronics. To the electronics is not wrong per se but if you have a failure and a short happens, the whole airframe has a direct path to the electrics.....stuff can get fried.......RonTeam MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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05-08-2013 11:06 PM  6 years ago
smittylube

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Santa Cruz, CA

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Ok will do motor plate only. Easy peezy

Finishing a 550sx currently.
I ran it to the motor mount as well as the neg of the battery on my 600 3d now sx. Not a problem so far- not to the electronics on that one.

Thanks guys
RPM is your friend..................................until you crash
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05-09-2013 05:02 PM  6 years ago
RyanW

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Edmond, Oklahoma

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I have it done to the motor plate on one machine and to the neg battery terminal of the ESC on the other one. I am sure there is a trade off one way vs the other but I don't really know which is better.-Ryan
Mikado USA, Kontronik, Opti-Power, MKS Servos
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05-09-2013 10:39 PM  6 years ago
cudaboy_71

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sacramento, ca, u.s.

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guess i shouldn't be an electrical engineer. i did both on my machine--tail grounded to a neg terminal of the RX and to the motor plate. almost 100 flights so far it has worked fine. and, i definitely need the ground in my dry climate. machine was all wonky ungrounded.if it ain't broke, break it.
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05-10-2013 12:00 AM  6 years ago
Jays200

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Perth, Western Australia

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I was having static hits on my new 600SX, something I'd never experienced with my black belted 400SE and 800Xx, even with the earthing kit installed as per the instructions. Yes it had continuity all the way through.

My solution was to run an earthing wire from the boom earthing screw to a spare port on my Vbar. Problem instantly fixed.
Logo 800 Xx, Logo 600SX, Logo 400SE
Kontronik ESC and Pyro, Vbar
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05-10-2013 12:40 AM  6 years ago
BobOD

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New York- USA

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It's quite sensible to ground the electronics and airframe together. Of course this means if a wire gets chaffed it could now cause a short to the airframe but if you're not sloppy, this should not happen.Team POP Secret
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05-10-2013 01:37 AM  6 years ago
Ronald Thomas

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Gainesville, Fl, USA

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There is nothing wrong with going to the negative terminal, until you have a crash that shorts the frames and that kills all your electronics....go to the motor plate and if that does not work, then go to the negative terminal....RonTeam MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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05-10-2013 01:57 AM  6 years ago
BobOD

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New York- USA

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Good point, I've never had my wiring damaged in a crash that way but can see it happening.
Still, I'd rather toast some electronics due to a crash than have static send a heli into a crowd.
Team POP Secret
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05-10-2013 02:18 AM  6 years ago
Jays200

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Perth, Western Australia

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I'm sure you could put some uber low rated fuse in your negative earth to your electronics just in case you had an airframe short during a crash.

I'm not sure how'd you work out the rating of the fuse.
Logo 800 Xx, Logo 600SX, Logo 400SE
Kontronik ESC and Pyro, Vbar
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05-10-2013 08:36 PM  6 years ago
BobOD

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New York- USA

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Unusual...but clever idea.Team POP Secret
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05-10-2013 08:44 PM  6 years ago
Ronald Thomas

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Gainesville, Fl, USA

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Static is a power surge. If the fuse it too low then it will now and Then you have no grounding again so the size of the fuse would be pretty critical.Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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05-10-2013 11:30 PM  6 years ago
BobOD

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New York- USA

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If static was generating more than an amp, I'd just go to a TT. I doubt it is anywhere near an amp though. A well grounded heli shouldn't build up potential so no big surges.Team POP Secret
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05-10-2013 11:33 PM  6 years ago
Ronald Thomas

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Gainesville, Fl, USA

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Never measured it before but then again, going to the motor plate has always worked for me.Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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05-10-2013 11:46 PM  6 years ago
BobOD

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New York- USA

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I wouldn't plan on using a fuse anyway. My goal isn't to prevent crash damage nearly as much as to prevent an out of control situation. I just feel that way the burden is on me instead of unsuspecting bystanders.Team POP Secret
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05-11-2013 04:22 AM  6 years ago
KC

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WA

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I had nothing but trouble with grounding the boom to the rx with a vbar in 72mhz...same rx gave trouble when using m/s 2 line connections with Jive ESCs. Wouldn't try it with 2.4 either.

Motor plate is easiest, just sand/scratch/scuff all the metal surfaces from the pulley bearings to the boom to the plate.
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05-11-2013 12:28 PM  6 years ago
Jays200

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Perth, Western Australia

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My 600SX was/is grounded to the motor plate but I was still getting static hits. Once I grounded the boom to the Vbar as well, problem solved. No fuse Logo 800 Xx, Logo 600SX, Logo 400SE
Kontronik ESC and Pyro, Vbar
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05-11-2013 12:32 PM  6 years ago
Ronald Thomas

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Gainesville, Fl, USA

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Yeah, every one is different, pretty amazing how that works considering every airframe is basically the same. The atmospheric conditions are a HUGE variable.Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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05-11-2013 08:02 PM  6 years ago
BobOD

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New York- USA

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Poor motor insulation can be an issue sometimes.Team POP Secret
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