Thorspark Ignition AA

General electrical problems
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Steven.Carter
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Thorspark Ignition AA

Postby Steven.Carter » Sun Apr 22, 2012 5:23 pm

I have Thorspark electronic ignition fitted to my Huntmaster, but it has always worried me what would happen if my dynamo died.
So with a little help from Chris Brindle at the LDR this weekend we cobbled together 8 AA batteries to give us 12 volts and connected it to just the ignition, the bike fired up and did the whole run back to the hotel,
My bike has a new name Duracell!!!

Steve

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daithomas
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Re: Thorspark Ignition AA

Postby daithomas » Sun Apr 22, 2012 7:03 pm

Hi Steve,
I suppose you're new name is Ever Ready
regards,
Dai

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Steven.Carter
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Postby Steven.Carter » Sun Apr 22, 2012 7:17 pm

me ever ready. I don't think so :D. Should get a laugh when I ask for some AA batteries to get my bike going!

Steve

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john.nash
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Postby john.nash » Mon Apr 23, 2012 9:20 am

I have a question on this then.
How big is your standard battery, in there, and what is the current draw of the system and coils ?

The chances are that you'd get a fair few hours before your battery packed up. Of course, that is dependant on running without lights.
How long would the AA batteries last ?
John "Josh" Nash
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2009 royal Enfield,1978 t140 bonneville, '67 CJ750, 196-ish Ural M62 outfit, 1960 k750, ''51 kH500, ''49 soon to be Ariel bobber, 47 VH twinport, '44 Ariel WNG, '43 Ariel WNG, ' and piles of rusty scrap ....

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Postby brenton.roy » Mon Apr 23, 2012 11:48 am

Hi, this is a good solution as a temporary battery that isn't conected to a charging system, as Steven has.
NiCad's go into something called "Thermal Runaway" if you keep charging them and they get hot. I saw this a few years ago when I did solar cars.
There's almost nothing you can do when the reaction gets out of hand.
Brenton - AKA "the fun police"...
'51,'56 Squares, '48 VH, '27 Model C, R67/2, Mk IV Le Mans, '06 Super Duke and Ariel projects.

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Steven.Carter
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Postby Steven.Carter » Mon Apr 23, 2012 3:25 pm

I have a pair of 6volt sealed batteries in there at the moment John which would last a long time if the charging stopped but its nice to know I have a back up, the AA's would probably do around 150 miles as our ride round the Yorkshire dales was 112 miles and was still going. I didn't fancy flatting the batteries completely as my bike would know the worst possible place to stop on the M1 :cry:
I used some cheap alkaline batteries not the Ni cads Brenton
Maybe I could get 300 miles out of the same setup on a single?

Steve

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john.nash
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Postby john.nash » Tue Apr 24, 2012 8:42 am

Are all singles magdyno ?
We just lose our lights but keep running ...
John "Josh" Nash
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AOMCC No.4119
2009 royal Enfield,1978 t140 bonneville, '67 CJ750, 196-ish Ural M62 outfit, 1960 k750, ''51 kH500, ''49 soon to be Ariel bobber, 47 VH twinport, '44 Ariel WNG, '43 Ariel WNG, ' and piles of rusty scrap ....

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Postby alan.richmond » Wed Apr 25, 2012 11:28 pm

When in trouble, call out the AA, eh!

A. Why not carry a spare motorcycle battery?
B. Why not wire it in, through a change-over switch?

Alan
"Red Leader", Velo LE Mk II, Mk III. Honda Benly CD 200

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Postby nevhunter » Thu Apr 26, 2012 3:39 am

What are you guys doing riding at night with Lucas (Prince of Darkness). You are bringing back memories of the dip switch that has an "all black" position...Nev

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Postby alan.richmond » Thu Apr 26, 2012 10:43 pm

That would be the War-time "Air Raid" position, wouldn't it!

Alan
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