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What Battery
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buzzy bee



Joined: 23 Nov 2007
Posts: 3382
Location: South Cheshire

PostPosted: Mon Apr 02, 2012 7:54 am    Post subject: What Battery Reply with quote

Hi

What battery do I buy to power my flashing beacon, obviously it needs to last as long as possibe, as it won't have any charging untill I get home, it will only have a beacon on it mind.

Cheers

Dave
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emmerson



Joined: 30 Sep 2008
Posts: 1268
Location: South East Wales

PostPosted: Mon Apr 02, 2012 10:57 am    Post subject: Reply with quote

I'd go for what they call a 12x12. These are used on small mobillity scooters, and seem to go on for ever. I have a spare one for herself's stand-by scooter. It's nevere been used on the machine, but I use it to jump start my ride on mower, and in two years I've never yet charged it.
About £30 as I remember. Also used on golf buggies, I believe.
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emmerson



Joined: 30 Sep 2008
Posts: 1268
Location: South East Wales

PostPosted: Mon Apr 02, 2012 11:07 am    Post subject: Reply with quote

I'd go for what they call a 12x12. These are used on small mobillity scooters, and seem to go on for ever. I have a spare one for herself's stand-by scooter. It's nevere been used on the machine, but I use it to jump start my ride on mower, and in two years I've never yet charged it.
About £30 as I remember. Also used on golf buggies, I believe.
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ukdave2002



Joined: 23 Nov 2007
Posts: 4100
Location: South Cheshire

PostPosted: Mon Apr 02, 2012 1:27 pm    Post subject: Re: What Battery Reply with quote

buzzy bee wrote:
Hi

What battery do I buy to power my flashing beacon, obviously it needs to last as long as possibe, as it won't have any charging untill I get home, it will only have a beacon on it mind.

Cheers

Dave


I'd go for LED flashing strobes, as seen on recovery vehicles, will give you much more battery life than a rotation beacon lamp....can't you strap a generator on somewhere?


Dave
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Roger-hatchy



Joined: 07 Dec 2007
Posts: 2135
Location: Tiptree, Essex

PostPosted: Mon Apr 02, 2012 2:20 pm    Post subject: Reply with quote

Can they not be solar powered / charged these days.

And yes LED would be less power consuming in another way, no power to a motor that turns the beacon.
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buzzy bee



Joined: 23 Nov 2007
Posts: 3382
Location: South Cheshire

PostPosted: Mon Apr 02, 2012 8:22 pm    Post subject: Reply with quote

Hi

I have been looking at strobes etc, not decided on what to do yet, so many to chose from.

I have seen lots of engines with a alternator under the flywheel, wich powers head lamps and a battery obviously, but I am not keen on it att the moment, for the ammount I plan to do... Would it matter an alternator going backwards?

Cheers

Dave
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Phil - Nottingham



Joined: 01 Jan 2008
Posts: 1252
Location: Nottingham

PostPosted: Mon Apr 02, 2012 8:30 pm    Post subject: Reply with quote

No as output is same in either direction before rectification surely
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47Jag



Joined: 26 Jun 2008
Posts: 1480
Location: Bothwell, Scotland

PostPosted: Mon Apr 02, 2012 10:03 pm    Post subject: Reply with quote

Dave.

The cooling fan would be the only problem. Sucking instead of blowing.

Art
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buzzy bee



Joined: 23 Nov 2007
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PostPosted: Mon Apr 02, 2012 10:11 pm    Post subject: Reply with quote

oh, thats the alternator off the list of ideas then, asI need to be able to reverse up ocasionally... lol
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MVPeters



Joined: 28 Aug 2008
Posts: 822
Location: Northern MA, USA

PostPosted: Tue Apr 03, 2012 7:53 am    Post subject: Reply with quote

Buzzy

See if these would do the job:

4 modes - bright white, red. green & flashing red. 40 hours run-time (maybe) on 3 little AAA batteries - included.

A local store in the US was selling these for $3.50 a pair a few weeks ago. I bought a dozen for use at the trolley museum that I volunteer at. If there's any left I'll get some more - e-mail me off-list if you want a couple.

http://www.ebay.com/itm/Brinkmann-9-LED-Multi-color-Flashlight-/320879363125?pt=US_Flashlights&hash=item4ab5e68435

MVPeters @ comcast.net
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ukdave2002



Joined: 23 Nov 2007
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Location: South Cheshire

PostPosted: Tue Apr 03, 2012 10:14 am    Post subject: Reply with quote

47Jag wrote:
Dave.

The cooling fan would be the only problem. Sucking instead of blowing.

Art

buzzy bee wrote:
oh, thats the alternator off the list of ideas then, asI need to be able to reverse up ocasionally... lol


For the low power you need cooling won't be an issue, also if air is sucked through the alternator rather than blown it will still cool.

Dave
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ukdave2002



Joined: 23 Nov 2007
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Location: South Cheshire

PostPosted: Tue Apr 03, 2012 10:26 am    Post subject: Reply with quote

47Jag wrote:
Dave.

The cooling fan would be the only problem. Sucking instead of blowing.

Art
quote="buzzy bee"]oh, thats the alternator off the list of ideas then, asI need to be able to reverse up ocasionally... lol[/quote]

For the low power you need cooling won't be an issue, also if air is sucked through the alternator rather than blown it will still cool.

Dave
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Jim.Walker



Joined: 27 Dec 2008
Posts: 1229
Location: Chesterfield

PostPosted: Tue Apr 03, 2012 3:34 pm    Post subject: Reply with quote

If you run the alternator backwards AC output will flow backwards and forwards - instead of forwards and backwards! Wink
Jim.
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Julian



Joined: 19 Apr 2010
Posts: 278
Location: Warrington

PostPosted: Tue Apr 03, 2012 4:25 pm    Post subject: Reply with quote

47Jag wrote:
Dave.

The cooling fan would be the only problem. Sucking instead of blowing.

Art


'tis a centrifugal fan. So works the same what ever the direction of rotation.

Though to be fair the vanes are slanted a little so it won't be as effective. I made a cooling fan once for an alternator out of some heavy aluminium plate - all I had was a drill and some tin-snips.

Julian.
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MVPeters



Joined: 28 Aug 2008
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Location: Northern MA, USA

PostPosted: Tue Apr 03, 2012 4:32 pm    Post subject: Reply with quote

Turn the fan around on the shaft?
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