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Power for Checking Systems Out on the Ground

 
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bobair(at)me.com
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PostPosted: Sun Feb 13, 2011 7:36 pm    Post subject: Power for Checking Systems Out on the Ground Reply with quote

Bob N., et al,

I'm getting closer to powering up my new IFR panel. I need a source of power for an extended period of time on the ground without the engine running for checking out the systems, their initial set-up, and for training myself on the real boxes. I have a BatteryMINDer charger/maintainer and a Radio Shack power supply whose output is rated at 13.8 VDC at 15 Amps.

Should I just disconnect the main battery and use the power supply in its place? Can I hook the power supply up to the battery + and - terminals and use it as a "battery booster" (or would this toast the battery)? Should I just use the battery and charge it overnight with the BatteryMINDer? Other?

I intend to bring up one circuit at a time and I want to measure each circuit's actual power consumption and I'll need to be careful not to overload the power supply.

Best regards,

Bob Falstad
GlaStar N248BF


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VIXEN



Joined: 23 Nov 2009
Posts: 35

PostPosted: Mon Feb 14, 2011 3:51 pm    Post subject: Power for Checking Systems Out on the Ground Reply with quote

This may be slightly off topic but is there anything wrong with charging my a/c battery (modern automatic charger) without disconnecting from the battery terminals from the a/c? I hook up the charger occasionally in order to maintain the battery if I am not flying regularly. Also,if I am testing electrical components such as radios or lights I have the charger hooked up in order to more accurately simulate actual alternator operation. The a/c engine is a Rotax 912UL. Is there something wrong with this reasoning?
Don
On Mon, Feb 14, 2011 at 12:10 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
[quote] --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>


Quote:
I have a BatteryMINDer charger/maintainer and a Radio Shack power supply whose output is rated at 13.8 VDC at 15 Amps.


Should I just disconnect the main battery and use the power supply in its place?  Can I hook the power supply up to the battery + and - terminals and use it as a "battery booster" (or would this toast the battery)?

  Forgot to touch on this. Your existing supply output
  voltage is not high enough to hook directly across a
  battery and still have the recommended isolation
  (back feed prevention) diode. So you can use the
  power supply to emulate a battery. Disconnect
  the battery and put the power supply in its place.



  Bob . . .



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