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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> 24 volt battery
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24 volt battery - 11/14/2005 11:39:33 PM   
bigtroutdog


 

Posts: 64
Joined: 9/20/2005
From: Reno, NV, USA
Status: offline 		I need a 24 volt battery for an electric starter. Can i wire two 12 volt batteries. How?
Who sells a 24 v battery ( auto parts store? )
thanks
       Post #: 1

RE: 24 volt battery - 11/15/2005 2:22:11 AM   
Nogyro



Posts: 1981
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline
quote:

ORIGINAL: bigtroutdog

I need a 24 volt battery for an electric starter. Can i wire two 12 volt batteries. How?
Who sells a 24 v battery ( auto parts store? )
thanks



I've never seen a 24 volt battery myself, but you can wire two lawn mower batteries up to get it. Just connect the plus of one battery to the negative of the other. Then hook your starter to the remaining + and - terminals. Disconnect the batteries and charge them as seperate 12 volts.

I used the 7 amp gel cell batteries after I got tired of lugging the lawn mower batteries around. Here's a pic of what happens when the wires short out.


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RE: 24 volt battery - 11/15/2005 10:58:41 AM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		Bigtroutdog,
Cheeeezze Nogyro way to scare the socks right off from him!
Follow Nogyro advise and insulate the wires and you won't have that happen. It will work fine.
John

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RE: 24 volt battery - 11/15/2005 12:29:21 PM   
Nogyro



Posts: 1981
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline 		JNorton,

That's why I posted the picture of the fried batteries......... Nothing like standing out at the flight line flying your plane and smelling something burning. Yikes! It was my flight box. LOL Got it put out in time so all I lost was the batteries. If you use the Gel Cells, be sure to flip flop the batteries so the terminals are at opposite ends of each other. If you look at my picture, you'll see they are side by side. BTW, I only had those batts for one week. Learned my lesson.

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RE: 24 volt battery - 11/15/2005 3:28:24 PM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		A 20 amp fuse would have prevented that!
I agree nothing worse than a dead short and no way to disconnect the power.

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RE: 24 volt battery - 11/15/2005 6:43:46 PM   
Nogyro



Posts: 1981
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline
quote:

ORIGINAL: JNorton

A 20 amp fuse would have prevented that!


Fuse? What's that?

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RE: 24 volt battery - 11/15/2005 7:39:05 PM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		It's that little fusible link that no one ever gives a thought to until they need it! It's always too much trouble to put in or purchase - don't ask.

My brother installed a stereo in an old van. He did not use a fuse on the power amplifier. Late one night the van committed suicide! All that was left after the fire was a rusty skeleton. He was living in my apartment at the time and we both got tossed on the street. The stereo was so loud he got complaints from 3 blocks away. He only played it while I was at work. I thought of it as a sort of wierd justice as I lost the apartment and he lost the van. It did make moving a bit of a pain since all we had left for wheels was my Honda motorcycle.

Later,
John

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RE: 24 volt battery - 11/15/2005 10:10:34 PM   
bigtroutdog


 

Posts: 64
Joined: 9/20/2005
From: Reno, NV, USA
Status: offline 		Thanks for the info. Will 24v do anything to the power panel? (Tower Hobbies Deluxe)

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RE: 24 volt battery - 11/16/2005 12:13:15 AM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		Probably blow out the glow plug source and any fuel pump you've left hooked to it.

Disconnect the positive wire from the starter jacks. Next put the two batteries in series and wire the positive 24 volts to the starter jack. Use the midpoint connection - 12 volts - between the batteries to power the rest of the control panel. The ground connection go where the original battery ground went.

John

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RE: 24 volt battery - 11/16/2005 3:50:12 AM   
Omaha_RC_Flyer



Posts: 489
Joined: 3/7/2004
From: Omaha, NE, USA
Status: offline
quote:

ORIGINAL: bigtroutdog

I need a 24 volt battery for an electric starter. Can i wire two 12 volt batteries. How?
Who sells a 24 v battery ( auto parts store? )
thanks



bigtroutdog,

See attached photos on what I did for a 24V power source to start my gasser with. I bought the tool box from lowes for around $8.00. I used two standard 12V 7Ah field batteries I had on hand and I picked up the Banana jacks from radio shack.


Later,
Omaha

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RE: 24 volt battery - 11/16/2005 11:30:59 AM   
Nogyro



Posts: 1981
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline 		Omaha,

Nice installation. That's a whole lot safer than my set up was..... Your's gives you 12 volts or 24 volts very easily, with just adding or removing your jumper.

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RE: 24 volt battery - 11/16/2005 2:23:00 PM   
Omaha_RC_Flyer



Posts: 489
Joined: 3/7/2004
From: Omaha, NE, USA
Status: offline
quote:

ORIGINAL: Nogyro

Omaha,

Nice installation. That's a whole lot safer than my set up was..... Your's gives you 12 volts or 24 volts very easily, with just adding or removing your jumper.


It has come in handy a few times at the field when my glow field box battery was too low in volts. I just plug my components into each of the 12V sections (i.e. starter in #1 and fuel pump in #2) Here is a link to a field box I made using the same type of tool box.

I take it with me when I only have a small amount of time to fly. Grab and go kind of thing.

Later,
Omaha

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RE: 24 volt battery - 11/16/2005 4:30:07 PM   
bigtroutdog


 

Posts: 64
Joined: 9/20/2005
From: Reno, NV, USA
Status: offline 		The reason I wanted 24v is for the starter. I have a 100 Saito. I'm using a Hobico torquemaster 180. When it hits the compression stroke, it stops. Maybe I need a better starter. Any recommendations?

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RE: 24 volt battery - 11/16/2005 7:55:54 PM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		That starter should turn over a 100 with ease. You should not need 24 volts.

If you've backed the prop off top dead center and are still having problems, possibly the battery is low. Read the battery voltage across the terminals when you use the starter. It should remain above 12 volts. Or you have a bad connection somewhere, possibly the switch inside the starter is bad.

John

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