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A123 for glow starter - 10/31/2007 9:54:41 PM   
BocaBen


 

Posts: 160
Joined: 4/12/2002
From: Boca Raton, FL, USA
Status: offline 		Another usage that I found for my A123 is as a starting pack (4 cells) for my Sullivan starter.
The 4 cells fit comfortably inside the Sullivan battery holder.

High current means plenty of torque for the starter, and the lack of self discharge means that you don't need to recharge it every week before going flying!

Ben


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RE: A123 for glow starter - 10/31/2007 10:16:55 PM   
Red Scholefield



Posts: 4780
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		Great idea, a friend of mine has made the economy version with A123 cells. Used by just about everyone at our recent club 40 races - and was still going strong at the end of the day.

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< Message edited by Red Scholefield -- 10/31/2007 10:18:12 PM >

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Red S.
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RE: A123 for glow starter - 12/19/2007 9:34:22 PM   
dfrazier


 

Posts: 40
Joined: 1/1/2003
From: Lake Charles, LA, USA
Status: offline 		I run a Tower Hobbies Heavy Duty starter on 5s A123's and use it to start my 33cc Homelite conversion engine. I love it.

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David Frazier

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RE: A123 for glow starter - 12/28/2007 1:13:06 AM   
YLF



Posts: 115
Joined: 6/18/2002
From: Pittsburg, KS, USA
Status: offline 		When I read the thread title I thought it was referring to a glow plug igniter. Since it is closely related, I hope this isn't thread hijacking to post pics of my a123 glow plug lighter. I just made this up at the end of the flying season so haven't had a lot of actual use yet but it seems like it should work well, and won't always be dead when I go to use it like my Nicd igniter. I simply installed 2 diodes in line to drop the voltage and have measured voltage at the plug at 1.3 -1.5 volts. Hopefully it won't burn out plugs, it hasn't hurt my test plug so far which is an old used plug that had been flown in an engine for quite a while.

The diodes on this one are the 3 amp from Radio Shack and they get pretty warm if you leave the plug attached for a while but seem to be holding up ok. The first one I built (which I sold to a fellow club member) used the 6 amp RS diodes but they were out of those when I went back.

Mike

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RE: A123 for glow starter - 12/29/2007 5:02:18 AM   
GhostRider32


 

Posts: 127
Joined: 11/23/2006
From: NE, TX, USA
Status: offline
quote:

ORIGINAL: dfrazier

I run a Tower Hobbies Heavy Duty starter on 5s A123's and use it to start my 33cc Homelite conversion engine. I love it.


Could you post a picture of the way you made your pack and attached it to the starter? Thanks.

(in reply to dfrazier)
       Post #: 5

RE: A123 for glow starter - 12/29/2007 8:12:38 PM   
Rfabbre



Posts: 174
Joined: 9/26/2004
From: Roseville, CA, USA
Status: offline
quote:

ORIGINAL: Red Scholefield

Great idea, a friend of mine has made the economy version with A123 cells. Used by just about everyone at our recent club 40 races - and was still going strong at the end of the day.



Are you using the 1100 mah (VPX) or the 2300 mah (DeWalt) batteries? Or something else? How are you charging them?


(in reply to Red Scholefield)
       Post #: 6

RE: A123 for glow starter - 1/1/2008 11:58:54 PM   
BocaBen


 

Posts: 160
Joined: 4/12/2002
From: Boca Raton, FL, USA
Status: offline 		YLF,
Thanks for the suggestion on the ignition starter using the A123 cell and the diodes.
I did not even think about doing that but it make so much sense now!
Using a Dean connector is also a great idea.
Thanks
Ben

(in reply to Rfabbre)
       Post #: 7

RE: A123 for glow starter - 1/2/2008 4:52:34 AM   
Rfabbre



Posts: 174
Joined: 9/26/2004
From: Roseville, CA, USA
Status: offline 		I just finished building a 4s1p VPX pack to power my Hangar 9 starter. My Astro Flight meter shows it is pulling 33 watts at 12.76 volts with no load on the starter. Under the load of cranking a well broken in Saito 91, it pulls 140 watts at 11.95 volts, but it is able to sustain long enough to get the easy starting Saito running. I don't know what those numbers mean---just reporting them in the hopes that someone will comment.

What's really nice is that with the recently installed 42% Products glo-igniter (works great---$24.95), all I need to fly now is gas, starter, plane and radio. Ain't technology great.

(in reply to BocaBen)
       Post #: 8

RE: A123 for glow starter - 1/2/2008 4:00:01 PM   
everydayflyer



Posts: 893
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline
quote:

140 watts at 11.95


watts / volts=Amps.

140/11.95=11.7amps.

These cells are happy up to 20 amps. at which point they are right at 2.5 volts per cell. They are rated for 30A cont. so yours should last a very long time at these levels.

The Foamie aircraft I fly them in pull up to 30A burst and the average amp. load for a 8 min. flight is just over 7.

Charles

(in reply to Rfabbre)
       Post #: 9

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