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RV-10 Electrical

 

 

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RV-10 Electrical and Schematics    

I've studied quite a few schematics and was bothered by their complexity and dependence on diodes. The 122NQ030 is an obsolete part and I don't want to be stuck trying to find one in the future. I redesigned using two batteries and three solenoids - No Diodes.

These are my design parameters:

  1. I want my EFIS on an independent bus for start up. High side transients are not an issue but a low bus during cranking is an issue and the EFIS could reboot.
  2. E-bus should be isolated from main bus so it can be powered and not feed back to main bus.
  3. Need a mechanism to charge both main and aux battery.
  4. Want to be able to run ebus from main or aux battery.

Based on these design parameters, which may be the same or different from yours, I came up with the topology in the schematic below.

Operation of this circuit is as follows:

Prestart - Main Batt switch open, Aux Batt switch closed, X-feed switch open. E-bus is powered from Aux battery and EFIS boots.

Start - Main Batt switch closed, Aux Batt switch closed, X-feed switch open. E-bus is powered from Aux, Main cranks engine

Run/Flight - Main Batt switch closed, Aux Batt switch closed, X-feed switch closed. Batteries Charge.

Emergency Start - Main Batt switch closed, Aux Batt switch closed, X-feed switch closed. Engine cranked by both batteries. EFIS may reboot during start.

Emergency Alt Failure - Main Batt switch open, Aux Batt switch closed, X-feed switch open. E-bus is powered from Aux. Everything else powered down.

Features of this configuration are:
1. E-bus always sees full bus voltage and diode voltage drops are not an issue
2. Aux battery can provide cranking power
3. The extra solenoid is cheaper than diodes and heatsinks and mounting. They are also available in the field in an emergency.
4. Altenator field can not be enabled unless at least one battery contactor switch is in the ON position.

RV-10 Schematics
To download any of the schematics, first expand by clicking on the picture then right click and Save Picture As to your computer.

Main schematic showing three primary busses

Tail cone, engine compartment and tunnel schematic

Control stick schematic

Wing schematics

Tail cone schematics

Avionics - bus structure

Avionics - power, ground, and analog

Avionics - ARINC, RS-232 and CDI

Grand Rapids EIS-6000

Electrical System Photos
Here are photos of the electrical system as I build it.

Breaker Panel Drawing

breaker_panel_t (7K)

Actual Breaker Panel

P6210023_t (17K)

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Last update 25Mar2010