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  #1  
Old 01-11-2018, 02:19 PM
nevetsw18 nevetsw18 is offline
 
Join Date: Jul 2011
Location: T67
Posts: 84
Default Ground power plug

Hello,

I'm currently working on my simple skyview panel. I'm looking for info from the brain trust on the installation of a ground power plug. I'm wondering how you did it/what parts you bought to make it happen?

The primary goal of adding a plug is to program the efis and add flight plans and routes to the system prior to departure. I have an EarthX battery and would like to avoid using a trickle charger whilest programming my efis.

Thanks!
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  #2  
Old 01-11-2018, 03:04 PM
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Raymo Raymo is offline
 
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Location: Richmond Hill, GA (KLHW)
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You'll need a charger specifically approved for your EarthX battery. This one comes with the quick disconnect you can attach to the battery and plug in through the oil door.

I have the same setup for my PC680 and it worked well for keeping the battery charged while doing the EFIS setup.
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  #3  
Old 01-11-2018, 03:25 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 4,073
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I mounted an Anderson SB50 to my engine mount and is accessible from the oil door. It is good to 120 amps, and not too bulky. I used a #8 wire for connection. A heavy jumper adapter and a charger/power supply adapter plug was made. I got the part numbers from the anderson site and ordered all components from Mouser.

A tee handle was added to the jumpers to facilitate easy removal. Although, not weightless, the whole weight added is minimal for the function.

EDIT: PS - I have a MFJ power supply like the one Carl linked - dead quiet electrically for your avionics work, and the Earth X will be happy too. Get the unit with a voltage and amperage meter.
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Last edited by BillL : 01-11-2018 at 06:16 PM.
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  #4  
Old 01-11-2018, 04:56 PM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 1,184
Default

Quote:
Originally Posted by nevetsw18 View Post
Hello,

I'm currently working on my simple skyview panel. I'm looking for info from the brain trust on the installation of a ground power plug. I'm wondering how you did it/what parts you bought to make it happen?

The primary goal of adding a plug is to program the efis and add flight plans and routes to the system prior to departure. I have an EarthX battery and would like to avoid using a trickle charger whilest programming my efis.

Thanks!
The simple way to do this is to add jumper wires, say 12 gauge, one to your avionics buss or airplane side of your master solenoid, and one to your ground buss. Pick a connector of your choice. The mating connector gets hooked to a 30 amp or so regulated power supply. In this configuration your master solenoid can remain off, or you can turn it on if you want to do a little charge. In this latter case the charge rate will be dependent on how big a power supply purchased. When not in use you can tuck the jumper wire up behind the panel.

A simple power supply like this one would meet your needs: https://www.gigaparts.com/mfj-4230mv...iABEgJfDvD_BwE

I recommend never running avionics or pMags on your battery with any battery charger connected.

Carl
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  #5  
Old 01-11-2018, 06:58 PM
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N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 11,054
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I did it two ways.

I bought one of these: (With an Earth-X battery, you will need a different charger.)


And put connector with the ring terminals on the battery. I used Adel clamps to hold the connector in place by the oil door.

The other option, which I also did and didn't work very well was to wire on of my two cigarette lighter plugs to the always hot buss with larger wires and an 7.5 amp breaker. Then I could charger the battery with that.

My preference is to use the connector by the oil door.
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  #6  
Old 01-11-2018, 07:50 PM
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n82rb n82rb is offline
 
Join Date: Jan 2007
Location: fort myers fl
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i just power up the skyview on the backup battery and load it up. the amount that it brings the backup down is not that much and it recharges in the first few minutes of the flight.

bob burns
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  #7  
Old 01-12-2018, 08:15 AM
woxofswa woxofswa is offline
 
Join Date: Sep 2007
Location: Mesa Arizona
Posts: 443
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I wired up an external Piper style plug receptacle per the Aeroílectric plans and it works great. I already had a set of external cables with the Piper male plug that I got at an air show aero mart for $10. Any FBO anywhere should have a set if you donít carry your own. It was very convenient when building and testing stuff to use a spare battery on the shop floor for power. I didnít buy my shipís battery until the day before first engine start. Having the external plug has saved my bacon a couple of times in the field. Very good return for small investment (receptacle, relay, switch, etc). I once saw a guy whoís main battery relay failed in a remote area and he simply swapped his identical external plug relay as an emergency field repair to get home.
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  #8  
Old 01-13-2018, 06:29 AM
Robert Anglin Robert Anglin is offline
 
Join Date: Mar 2008
Location: houston, texas
Posts: 728
Default Us too.

As with the last post and if we are taking an 8 here. We used a Cessna type plug and mounted it with a 4130 shop made bracket to the engine mount in the upper right corner at an angle, up and forward. So you could just open the oil filler door and plug into it. We placed it so you could plug in and still service the oil and get your hand down in and around to pull the cowling pins out. The ground side went to the engine mount and the positive to the battery side of the master relay. We have a set of jumper cables made with #4 welding cable about 25 feet long with auto clamps on one end and the mate to the receiver on the other end. This lets us put an auto batter off under a bench with an automatic trickle charger on it as a buffer so we can run all day with hangar flying jobs. Then if we leave the master on over night, like does happen we can just charge back up or get a jump if we are on the road someplace and need one. I like the others like to roll up my jumper cable and take it along on long trips like KOSH. Just what we did. Yours, R.E.A. III # 80888
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  #9  
Old 01-13-2018, 10:05 AM
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maniago maniago is offline
 
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Location: Bowie MD
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For those of you who chose a spam can plug, any reason Cessna over Piper or Piper over Cessna? (perish the thought for them to have chosen the same design....).
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  #10  
Old 01-13-2018, 10:40 AM
woxofswa woxofswa is offline
 
Join Date: Sep 2007
Location: Mesa Arizona
Posts: 443
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It isn’t really Piper vs Cessna, it’s round vs flat. I used to have a Socata that had the round “Piper” style which seems more prevalent in smaller aircraft whereas the flat one is used even in large biz aircraft. Most FBO’s have start carts or at least cables with both.
I chose the round one because the components are smaller, lighter, and cheaper and because Bob Nuckles of Aero’lectric fame had simple plans available for modifying and installing the assembly. The round one available at Spruce is also designed for external application with a spring door. The flat designs that I found at the time were open requiring a recessed protected installation. I installed mine in the aft lower fuselage where the cable run to the battery would be short and the distance to the prop long for whomever has to pull the plug after a field start.
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Last edited by woxofswa : 01-13-2018 at 10:47 AM.
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