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28 volt aircraft batteries

 
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terryjm1



Joined: 27 Sep 2005
Posts: 119
Location: St. Louis, MO

PostPosted: Tue Jul 04, 2006 8:39 pm    Post subject: 28 volt aircraft batteries Reply with quote

In my never ending procrastination of buying a new set of batteries, I have found another possibility and would like your thoughts.

I have found a source for very nice used batteries. I have a friend that works for a company that services airplanes. There are apparently very strict regualtions on the time a battery can be used in the planes they service. They are 28 volt gel cells. He says they are the highest quality.

The idea came up when he asked me if I knew of someone that would take the batteries and not charge a disposal fee.

I dont have any information on the specifications. We only discussed it yesterday and he had no information off the top of his head.

If they will fit and produce adequate amp hours, can you guys see anything wrong with giving them a try?

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Terry Merrell
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MajorWilson



Joined: 26 Sep 2005
Posts: 236
Location: Peoria, AZ

PostPosted: Tue Jul 04, 2006 8:42 pm    Post subject: Reply with quote

The only problem I can see is that 28 volts does not equate too well to our 144 and 276 volt systems.
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Jeff Wilson
US Army (Ret)

Plug in the cord... not the pump!
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terryjm1



Joined: 27 Sep 2005
Posts: 119
Location: St. Louis, MO

PostPosted: Wed Jul 05, 2006 12:10 am    Post subject: Reply with quote

I was thinking 280 would be close enough to 276.
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Terry Merrell
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MajorWilson



Joined: 26 Sep 2005
Posts: 236
Location: Peoria, AZ

PostPosted: Wed Jul 05, 2006 12:11 am    Post subject: Reply with quote

That could work for you. I guess it depends on the size.
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Jeff Wilson
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Jimmy Argon



Joined: 06 Oct 2005
Posts: 41
Location: Az

PostPosted: Wed Jul 05, 2006 12:26 am    Post subject: 28 volt Aircraft batteries Reply with quote

Terry,
I may be interested in some. If you can get the make and model I may be able to get some technical info since I work in Avionics. If they are off commercial Aircraft (Boeing/Airbus) they are pretty good size and I can get the data.
Jimmy
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terryjm1



Joined: 27 Sep 2005
Posts: 119
Location: St. Louis, MO

PostPosted: Wed Jul 05, 2006 12:36 am    Post subject: Reply with quote

When I get the info I will post it.

Thanks Jimmy

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Terry Merrell
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ThomasHudson
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Joined: 26 Sep 2005
Posts: 130
Location: Port Washington WI

PostPosted: Wed Jul 05, 2006 12:01 pm    Post subject: Reply with quote

The only major thing to watch out for is to be sure that when charging, the finish charge voltage does not exceed the maximum input voltage rating on the DC-DC converter. When I changed my Force from lead-acid to NiCD, I had to get a new DC-DC unit because the finish voltage on the NiCDS (worst case, when initializing) is around 220V, which was higher than the standard DC-DC unit in the 156V lead-acid car.
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terryjm1



Joined: 27 Sep 2005
Posts: 119
Location: St. Louis, MO

PostPosted: Wed Jul 05, 2006 10:11 pm    Post subject: Reply with quote

Thanks Tom,

My voltage range on the DC750 is 200 to 400. It should be ok.

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Terry Merrell
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