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RX Pack Interference Question

Old 03-23-2004, 08:35 PM
  #1  
roadman
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Default RX Pack Interference Question

To all:
I am building an aircraft utilizing an Astro 60 cobalt motor system. The aircraft came out fairly tail heavy. As this is a competition aircraft, I'm concerned about any additional weight to balance the aircraft. I have room to put the RX pack in the nose of the aircraft, however that puts it very close to the motor (~2"). Can anyone see any problems with placing the pack here, specifically in radio interference or range?

Thanks,

Jason
Old 03-23-2004, 09:17 PM
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Technito20
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Default RE: RX Pack Interference Question

No, absolutley nothing wrong with that. Unless you are planning on mounting it right on the head, where it'll burn it. Or right under the muffler where fuel goo can get on it. Other than that everything should be fine.
Old 03-23-2004, 10:21 PM
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Phil Cole
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Default RE: RX Pack Interference Question

The Astro 60 is an electric motor. It has brushes, so there will be some commutator hash as well as the switching noise from the speed control.

So, yes, it's possible that there will be interference problems. Keep the motor wiring and ESC as far as you can get from the receiver. The heavy part of the Rx pack is the battery, so put that up the front, and the receiver as far back as you can get. Run the antenna directly away from the receiver. Keep the receiver, servo, and Rx battery wiring away from the motor wiring.

Can't you move the power pack forward to help the CG? Maybe split the pack, and put a couple of cells up front.
Old 03-25-2004, 04:45 AM
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Lynx
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Default RE: RX Pack Interference Question

If you're going to mount it closer anyways one way of reducing noise would be to use a few extra capacitors on the motor. Generally speaking for 'optimium' noise reduction attaching one capacitor from each lead to the case of the motor, and one capacitor between the two leads will give you the best possible noise reduction.
Old 03-25-2004, 03:57 PM
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smokingcrater
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Default RE: RX Pack Interference Question

if you have problems, try wrapping the rx in something that has an aluminum backing on it.

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