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HelicopterGasser Model RC HelicoptersOther › Preventing radio interference
12-03-2005 05:00 PM  12 years agoPost 1
whitetrash

rrApprentice

Spain

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I've read almost every post about radio interference. I 've had one minor incident that I guess is caused by this. I decided to ground the frames and tail but I did not completely understand how should I do it, my english is limited . So anyone has some pictures of how is it done and a little explanation for foreigners dummies also . Thanks a lot!

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12-03-2005 05:02 PM  12 years agoPost 2
whitetrash

rrApprentice

Spain

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I forgot to mention I am flying a Vario Benzin Acrobatic with supressed plug cap.

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12-03-2005 05:33 PM  12 years agoPost 3
RUFFYB

rrNovice

HERTFORDSHIRE UK.

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Hi whitetrash,
i made up several bonding wires.
Remove the anodizing from the frames
where you screw the wire to.
There is a picture of my benzin trainer
in my gallery. You can see the wires there.
Regards, Gareth...

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12-05-2005 05:13 PM  12 years agoPost 4
Flying Tivo

rrKey Veteran

Monterrey,NL,Mexico

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Grounding

I can only agree with grounding the tail, as this is the only part of the heli that is isolated from the frames. The engine is grounded to the bottom frame via the crankcase. The bottom frame is connected to the side prames via the metal bearing holders for the lay shaft, so this means the side frames are grounded. The tail boom holder is the part that is isolating the tail. So if any that is wher the grounding needs to be done. I also have a Acrobat and i do not have problems with glitches. The only time i had a problem, it was the lower bearing on the lay shaft that was going bad. If its a persisting and costant problem, then you have a bad Coil, try and change that.

Felipe

If life throws at you lemons......Squirt some lemon juice in the eye of your enemy!!!!

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12-05-2005 05:25 PM  12 years agoPost 5
sparky666

rrApprentice

uk

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The best way to tell if the frames are grounded out to earth/engine is to test it.....use a continutity meter that gives out 200mha....test between engine and frame.....your looking for 1.2.....1.6 ohms.....remember if its carbon. its normaly coated i think.!!! so use wet and dry just around the contact part to get good continutity.
i have seen some post saying they have 40 ohms or more when testing...the lower the figure the better. I got mine to about 1.2 1.6,
this is still high would like to have .4
best way round if you can not get continutity is to use cable and crimps from engine to frames..
hope this helps.

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12-05-2005 05:50 PM  12 years agoPost 6
RUFFYB

rrNovice

HERTFORDSHIRE UK.

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Flying Tivo,
you might not have a problem with glitching but
i did not want to take the chance.
I checked my frames with a multimeter when i built
my trainer and the only way to get continuity was
to remove the anodizing and use bonding wires.
The engine had no bonding to the frames either!!
They may be directly bolted to it but the anodizing
does not conduct.
Regards, Gareth...

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12-05-2005 09:34 PM  12 years agoPost 7
whitetrash

rrApprentice

Spain

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I had just one minor incident but it scared me like hell. I was flying beside a construction area with a lot of trucks coming in a and out and all of them using their radios. I hovered for a minute and then went to forward flight, when the heli was 15 meters away the tail made a strange thing, thought it was the wind or something, but then the engine reved up for a second and the heli shacked. I landed as fast as I can with no damage. By the time that happened there were three trucks in a row near me, at about 10 meters, all of them using their radios. I don't know what to think. The day after I went to another place and felt like I was having some problems again, but I'm not sure, I don't know if it was radio interference or the wind or just me going crazy. So before something happens I wanna make sure I am soing all I can to avoid radio interference. Thanks a lot for your input.

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