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Crash caused by possible inteference from ignition battery?

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Old 09-24-2003, 08:04 PM
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Columbo
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Default Crash caused by possible inteference from ignition battery?

Today my 31% edge with a 3W75 gas engine crashed.

I took off, made a circle and was coming back around (took about 40 sec) when all of a sudden I didn't have control of the plane. It started a nose dive and went in at
about a 45 degree angle. I have been flying the plane for about 6 months now with no problems. However, today I moved the ignition battery farther back into the fuse to adjust the C.G. rearward. This put the ignition battery within 3 inches of the PCM receiver. It had previously been about 10 inches from the receiver. Is it possible for the ignition battery to induce such severe inteference? I am trying to isolate the problem. Any information would be appreciated.

Greg
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Old 09-25-2003, 01:20 AM
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Default RE: Crash caused by possible inteference from ignition battery?

Quiet simply put, yes that could have cause the problem.
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Old 09-25-2003, 06:15 AM
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amcross
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Default RE: Crash caused by possible inteference from ignition battery?

Greg,
Not only is it possible, but it is highly likely. EVERYTHING ignition related and EVERYTHING r/c related must be as far from one another as possible. 10" is the minimum distance I use; some others go as high as 12 or 14".
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Old 09-25-2003, 08:05 AM
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Default RE: Crash caused by possible inteference from ignition battery?

Thanks for the reply guys. It would be a huge coincidence if this was related to anything other than me moving the battery to within 3 inches of the receiver. Like I said I have been flying fine for 6 months now, and as soon as I move the battery, I crash with no control over the plane. I can live with making a dumb mistake such as this out of ignorance. However, what frustrates me is that I called Gerhard at aircraft international and asked him if moving the ignition battery close to the receiver would be O.K., and he specifically told me that it would be fine since the ignition is shielded and since I was using a PCM receiver.

Greg
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Old 09-25-2003, 11:59 PM
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Default RE: Crash caused by possible inteference from ignition battery?

You should drag the guy that told you that out and beat him =>
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Old 09-29-2003, 04:27 PM
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Default RE: Crash caused by possible inteference from ignition battery?

I agree with the beating

Another thing it could be is that you moved your CG back too far and made it unstable in pitch.
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