To the many fans of AeroElectric connection, you know Bob Nuckolls advocates separation as a primary means of reducing the problems associated with Electromagnetic Compatibility. For example, he says to "keep fat wires (which tend to have strong, noisy currents) seperated from the skinny ones (which tend to be avionics and instrumentation). Half a page later he says "Avionics and audio systems should not share wire bundles with DC power distribution".
In the interests of trying to follow this advice, I'm trying to plan how I'd bundle the wires leaving the panel aftward, and in modern RVs, there's a lot of them. Here's a few:
Down the fuselage, you basically only get two bundles. Down each wing, you might get two bundles. Which wires are victims susceptible to interference? Which are the antagonist wires? Mr. Nuckolls mentions some, but his list is hardly exhaustive. For example, are the wires to the roll AP servo victims or antagonists? I've heard it both ways. Are they DC power distribution, or are they avionics? Should you be seperating the AP power wires from the AP control wires? Where do antennas fit into this? Would these go into the fat bundle or the skinny bundle?
More generally, how would you plan your bundles to minimize noise issues? What general rules of thumb do you follow? I dare say Mr. Nuckolls' book leaves more questions than answers on the topic.
In the interests of trying to follow this advice, I'm trying to plan how I'd bundle the wires leaving the panel aftward, and in modern RVs, there's a lot of them. Here's a few:
- trim servo power and position sensor
- autopilot servo power and contol
- transponder antenna
- comm antenna
- GPS antenna
- strobe lights
- nav lights
- landing lights
- pitot heat
- magnetometer, OAT, fuel senders
Down the fuselage, you basically only get two bundles. Down each wing, you might get two bundles. Which wires are victims susceptible to interference? Which are the antagonist wires? Mr. Nuckolls mentions some, but his list is hardly exhaustive. For example, are the wires to the roll AP servo victims or antagonists? I've heard it both ways. Are they DC power distribution, or are they avionics? Should you be seperating the AP power wires from the AP control wires? Where do antennas fit into this? Would these go into the fat bundle or the skinny bundle?
More generally, how would you plan your bundles to minimize noise issues? What general rules of thumb do you follow? I dare say Mr. Nuckolls' book leaves more questions than answers on the topic.
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