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10-16-2005 05:41 AM  12 years agoPost 1
B.F

rrNovice

Graham, WA.

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How do i fix radio interferance on the gasser? Does simply grounding the engine to the frames fix glitching?? Brand new everyhing. Never been flown. Major glitching with the engine at idle. PCM futaba radio gear, digital servos etc. I had to remove the RF shield from the spark plug cable as it was grounding out the ignition coil and keeping it from running. After removal it ran great, but now I have major radio interferance. I routed the receiver antenna as far away as possible but that is only about 4-5 inches from the engine. PLEASE HELP!! Thanks.

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10-16-2005 06:08 AM  12 years agoPost 2
Crazy Horse

rrApprentice

Orlando FL

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RIF
did you build the heli with the spark plug facing fwd or rearward?

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10-16-2005 06:10 AM  12 years agoPost 3
B.F

rrNovice

Graham, WA.

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Engine is facing rearward. I have not yet ground the engine to the frame. I am doing this next before I start it again. Hope this works.

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10-16-2005 06:13 AM  12 years agoPost 4
aileron bail

rrApprentice

The guy with the dog named Aileron

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Base loaded ant on the RX might help ya i have one and no sheild on plug and no problems

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10-16-2005 06:16 AM  12 years agoPost 5
B.F

rrNovice

Graham, WA.

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Huh? What exaclty is a "base loaded antenna"?? thanks

B.F

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10-16-2005 06:17 AM  12 years agoPost 6
aileron bail

rrApprentice

The guy with the dog named Aileron

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Its a whip ant or a Deans ant

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10-16-2005 06:20 AM  12 years agoPost 7
Crazy Horse

rrApprentice

Orlando FL

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Happen to have another radio set you can try?
I have heard speculation that some RF is the result of the RF being of the right frequency in relation to the channel/freq the heli is on, They just both happen to be in the same spectrum to raise havoc. Grounding the frame is worth a shot but I won't comment on the routing of the antennea. I do know i routed my reg wire ant. directly under the coil and past the motor without issues for the past year....maybe I was just lucky.

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10-16-2005 06:27 AM  12 years agoPost 8
B.F

rrNovice

Graham, WA.

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Thats a good idea. I also thought that maybe simply going to a differnt channel would do it. I don't have another channel to try though. This hobby costs too much to have these kinds of problems. Wish there was better radio technology.

B.F

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10-16-2005 09:27 AM  12 years agoPost 9
mcatech

rrVeteran

Mount Gambier SA Australia

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Hi BF
Unfortunately I have suffered these problems before
but it can be cured
I have tried many things including optic isolator bosch plug caps different RX's etc etc
the thing that cured mine was to earth the individual frame sections to the engine block
even if you think the frames have a good earth it may not be the case
I have not had a problem with any of my gassers since
however I have not tried this on a spectra G and being carbon frames it could suffer the same as aluminium but to isolate problems
what radio are you running?
if your running FM I would not bother
I am sure some people have had success but FM will twich and jitter a fair bit on a gasser even with good earthing
Cheers Michael

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10-16-2005 02:12 PM  12 years agoPost 10
rbort

rrProfessor

Franklin, MA - USA

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Use the whip
Get a revolution whip antenna and mount it in the front like mine. See at my gallery here:

http://www.massheli.com/gallery/raja

Basic rules of thumb for me is to route all the RX wires as much as possible on one side of the heli and leave the antenna wire on the other side by itself. The base loaded antenna is the black "probe" about 6 inches long double stuck to the right frame and pointing just over the battery. Its a "revolution whip antenna" if you want to search online for a place to buy it.

I did the ground the RX to the engine in my 1005 heli for a few years but recently (a couple of years back) I realized that actually that was causing me to get failsafe every now and then when things weren't perfect and when I removed the ground they went away. So while I read here people say to ground it, in my experience I found it was more harmful than helpful on my ship. So if you try it be wary that it may make things worse not better.

Incidentally, what do you mean "major glitching" can you tell us what is happening? Do you have failsafe set and is it going into failsafe or what is happening?

-=>Raja.

MA 1005 Hanson 280, 4220 flts
Spectra 27 3DMax, 3310 flts
Whiplash V1-2 Hanson 300, 1618 flts
Whiplash V2 Hanson 300, 473 flts

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10-16-2005 11:11 PM  12 years agoPost 11
Toadster25

rrKey Veteran

Iowa

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You should be able to put the shielding on without it causing problems. I put RTV around the plug boot to seal the boot to the wire and maybe that is why I haven't had a problem with the spark grounding. I haven't had one problem with interfierence on my Specra G. I am using the normal antena wire through a tube attached to the landing struts on right side away from coil and plug wire.

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10-17-2005 12:42 AM  12 years agoPost 12
Jim Cimino

rrKey Veteran

NE Pennsylvania

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I am also running my Spectra without the shielding. I removed it after a crash due to being locked out. After I fixed the helicopter (minor damage) I was getting a lot of hits and didn't want to fly it. I decided to replace the spark plug wire cap with a new stock one and removed the shielding at that time. I also replaced the spark plug with an NGK and have not had any problems since. I think the plug was the problem.
Jim

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10-17-2005 03:13 AM  12 years agoPost 13
Toadster25

rrKey Veteran

Iowa

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I have been using the NGK iridium plug since the beginning.?

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10-17-2005 04:25 AM  12 years agoPost 14
thenewguy

rrElite Veteran

Corvallis, Oregon Where there is liquid sunshine!

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Yes, go with the ngk and a base loaded antana.

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