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Greg's RV-9A Builder Site
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Date: 3-4-2008
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Number of Hours: 3.50
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Manual Reference:
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Brief Description: Wiring
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Ran the other fat wire for the ground through the fuselage. Much easier, as it is straight throught the belly. I probably should have run the other one this way, maybe I'll change it. Uh... probably not. Anyway, then ran the other power related wires through, two #22 for the battery relay ground wires, and two #10 wires for the engine power "always hot" wires. They get protected by 80 amp ANL fuses, then will run to the engine main bus and the engine aux bus. The fat wire provides power to the Vertical Power VP-100, and that distributes power to everything else electrical in the airplane, except the engine related components. The ECU, fuel pumps, ignition, fuel injectors all get direct power from either the engine main bus or the engine aux bus. The engine main bus power comes from the main battery, and the aux bus power from the aux battery. The engine starter is the only engine related item that gets power not from one of those two buses. If the engine won't start, we aren't going flying anyway, so I don't need a redundant circuit for the starter. If the engine quits in flight, the windmilling propeller will be turning the engine just as well as a starter would. I also ran the stobe shielded wire to the tail. The only wires left to the tail are the elevator trim wires, which I won't get for a while, with my harness that will come with the VP-100, and I won't get that until I get my panel from Stein. We're talking 6 months to a year away for that.
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Contactor and Ground Bus
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Looking Forward
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