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T-REX 500 › Trex 500 RF interference with 2.4ghz
02-08-2008 04:29 AM  10 years agoPost 81
The_Widowmaker

rrElite Veteran

Bear Valley Springs, CA

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No the frame itself has nothing to do with the cause of the ESD but can be a determining factor in where the ESD goes. The ESD is looking to go to ground. If your frame is not grounded but conductive, like a CF frame, the arc may travel though it to the nearest, strongest ground like a servo, gyro or through a rx antenna.

On a plastic or GF frame the ESD is still going to be there and eventually will discharge somehwere and Im not saying it will necessarily be a component on the heli. Im not sure where it would go.

"I'm a Virgin.. I'm just not very good at it. "

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02-08-2008 05:42 AM  10 years agoPost 82
ARMSMASTER

rrVeteran

spokane, wa

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Never have had any issues with my swift. Also I have checked and there is no post about this type of stuff in the swift forum. I think it has something to do with the belt as some not all are having this issue. I find it hard to belive that some of us are building these kits that differently!! I also think that the CF frames has a bunch to do with it... I am going to pick up a set of GF frames this weekend at the show. I may get a complete GF kit but not sure if I want to invest the $$ right now on another kite...

Life is like a box of chochlates!

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02-08-2008 06:18 AM  10 years agoPost 83
rockier

rrKey Veteran

Las Vegas

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Ok, I have read thru this thread and I do not know the setup you guys or gals are using. I have not had this problem from day one. I have about 40 flights on the helicopter and have never put oil on the tail belt. The helicopter flies great with no glitching.

Now I will tell you about another guy at the field. From day one he could have the helicopter on the table and the tail would glitch all over the place without doing anything. Without spooling the helicopter up. I looked at his setup and noticed he had the motor wires running thru the frame. I told him to pull the motor wires out of the frames and run them on the side of the helicopter and to twist the wire around each other. After this change he has not had that problem again and he does not use oil on the belt either. I know that he has had about 15 flights now with not problems.

I looked at Paul Susbauer’s gallery and he has the wires on the motor the right way but I would twist them around each other to make sure the motor does not put out electrical charges. This is the link to his gallery. Gallery

I would like to know how the setup of the pilots that are having the problems. Can you take a picture of the helicopter and post it in your gallery so we can look at them.

------,\\\|///,-----
___*| # # |*
oo0---(_)---0oo

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02-08-2008 11:53 AM  10 years agoPost 84
gixxernoob

rrApprentice

fairfax, va

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I looked at the gallery and so the motor/esc connectors a little bit exposed... would that cause any problem? or should it be wrapped around with electrical tape?


M's Ichiro (51)

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02-08-2008 04:59 PM  10 years agoPost 85
rockier

rrKey Veteran

Las Vegas

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gixxernoob No, I do not think they would. I thing to do is make sure they do not go thru the frame to enter fear with the radio. Keep the wire from the motor and radio on different sides of the helicopter or as far away as possible.

------,\\\|///,-----
___*| # # |*
oo0---(_)---0oo

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02-08-2008 09:02 PM  10 years agoPost 86
Paul Susbauer

rrApprentice

Hillsboro, OR

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By the way, the one connector that looks like it is coming apart, its not. Its so freakin' tight that I can't get it comepletely together. The only way I got the connectors together is by squeezing the spring bar portion together with pliers.

Rockier, you are probably on to something with the twisting of wires. Its like on airplanes with long leads, by twisting the leads that always reduced interference. Additionally, with BL motors on some of the RTF helis my company offers, we have braided the motor wires and gotten much more favorable results.

I'll post some revised wiring layouts as mine has changed since I switched over to the FASST system.

If you look, I think Inkspot also routed all his wires like I did as far as the ESC wires/leads go.

--Paul

Ineptitude - If you can't learn to do something well, learn to enjoy doing it poorly.

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02-08-2008 11:20 PM  10 years agoPost 87
twinring

rrKey Veteran

japan

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whats the diameter of the Trex500 tail boom? I think theres a reason why other manufacturers went with a larger diameter boom for this sized heli.
Ive never liked CF booms, just one little stress crack which is so hard to find to begin with, will cause vibration.

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02-09-2008 02:18 AM  10 years agoPost 88
gregw

rrApprentice

Hong Kong

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Just to add my experiences trouble shooting my Logo 10 with ESD problems, the grounding solution that finally worked for me was to ground the tail boom and the motor case to the negative pole of the battery pack. I was using 72mhz PPM (Berg6 GIII) on the Logo 10, and this solution finally got rid of all my problems.. I've since moved to 2.4Ghz XPS, and it's still perfect.

From my understanding, to get rid of ESD, all "conductive" sections of the heli need to be grounded to a common ground. Since the Logo 10 has a plastic frame, that wasn't conductive, grounding the frame is not required. For the CF TRex 500 frames, you'll probably need to ground the boom to the frame and probably the motor case, and then all to the negative pole on the battery pack.

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02-09-2008 02:39 AM  10 years agoPost 89
Aberdeen

rrNovice

Las Vegas Nevada

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Paul, regading wire interference. this works well.

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02-09-2008 11:40 AM  10 years agoPost 90
Ben-T-Spindle

rrProfessor

Central Illinois

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What is the best way to attach a grounding wire to CF boom?

... BTS

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02-09-2008 01:09 PM  10 years agoPost 91
inkspot1967

rrProfessor

Cranston Ri

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If you look, I think Inkspot also routed all his wires like I did as far as the ESC wires/leads go.
i have mine routed differrently now. mine goes down and up thru the plastic frames and mounted the esc on bottom battery tray.

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02-10-2008 01:41 AM  10 years agoPost 92
bawufa

rrVeteran

Italy / Venice

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there is a simpler way to protect receiver from the Van der Graaff effect created from the belt :

- connect a wire to the support of the front pulley
- with dremel you must erase color from the support because usually it isolates the wire from the pulley, sometimes you need to dremel also the face of support in contact with the bearing
- in this way the wire, through the bearing, is in electrical continuity with the pulley (make a test with a voltmeter, there will be a clear continuity if you have made a clean work)
- connect the wire to te negative of the bec
- spray silicon or graphite only in the outer side of the belt

in this way the charges in the inner side of the belt go to the bec, instead in the outer side they can't attach themselves cause of the presence of the silicone.
The improvement of this solution is you need to spray the belt only once every 2-3 months because there is no consumption of the silicone in the outer side, the inner side is proteced by the wire.

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02-10-2008 01:47 AM  10 years agoPost 93
Brovic777

rrElite Veteran

Los Angeles, CA

My Posts: All  Forum  Topic

Just flew my new GF kit today for one pack hovering it around to test it out.

No glitches, awesome power, very balistic with 13t 100% throttle.

Killer Beam E4 450
Check out my HD Gallery

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02-10-2008 02:17 AM  10 years agoPost 94
misskimo

rrElite Veteran

Alaska 17 years, before mississippi for 31y

My Posts: All  Forum  Topic

one thing I noticed with my 500 , the belt is some plastic looking belt on mine , thin, never seen anything like it. one other thing I notice in the past here in Alaska, belts like the Joker , Rappy , and the 3Dmp, man they would have problems , with the razor I had , I was told they were useing a belt that wouldnt buildup ESD ( electro static discharge) like the yellow types belts, MA belt was black and had alot of rubber in it

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02-10-2008 06:39 AM  10 years agoPost 95
Tailrotor Joe

rrNovice

USA

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misskimo....what?????...can you please use english

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02-10-2008 06:50 AM  10 years agoPost 96
misskimo

rrElite Veteran

Alaska 17 years, before mississippi for 31y

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yeh! my southern typing sometimes lags behind my thinking

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02-10-2008 06:52 AM  10 years agoPost 97
Paul Susbauer

rrApprentice

Hillsboro, OR

My Posts: All  Forum  Topic

I think I get what Tony is saying....

The Rappy belts, as well as some of the other brands are typically made of XZY material (I don't know specifically) verses say a Hirobo Belt (which rock by the way) and as such have additives/materials that do not allow the ESD to build up. Basically, some may be more prone to it than others. Some belts clearly have a kevlar reinforcement for example.

If you look, I belived Greg McFadden on here already mentioned that they are available through SDP-SI. Additionally, he also mentioned that using not just a grounding strap, but one with a resistor to control the rate of discharge was possibly neccessary.

Ineptitude - If you can't learn to do something well, learn to enjoy doing it poorly.

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02-10-2008 11:32 AM  10 years agoPost 98
Kingair Cap

rrNovice

Las Vegas, NV.

My Posts: All  Forum  Topic

Okay, I was asked if my chopper was glitch free in hover or FF. Well, the answer is both.. I flew the blades off of that thing today and not a single glitch. I watched Alan Szabo fly the holy crap out of his CF frame and it is a smokin chopper. By the way guys, he isn't using anything different than we are and that thing flies insane... I couldn't be more impressed with an E-chopper. Ya and get good batteries, it helps. Junk the 12 tooth pinion. There's a shop out there that's selling packages with 2 4cell packs. The motor wasn't tested with 8 cells and it wobbles on 4 even with the 13 tooth 100%. Advice, get atleast a 14 preferably a 15 tooth if running 4 cells. Rocketship with 6 cells and 13 deg. I was only running 90% and smooth as fake jugs..

Enjoy.

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02-11-2008 09:19 PM  10 years agoPost 99
steph280

rrElite Veteran

Irvine, California

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The instruction was pretty clear: For 4S you need 16T or above.

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02-11-2008 11:37 PM  10 years agoPost 100
gian

rrVeteran

AZ

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...smooth as fake jugs
HA!! Excellent description there, King...

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