BSA C10 C11 C12

BSA C10 C11 C12 Forum => Technical Section => Topic started by: harneyguy on March 29, 2017, 06:45:45 pm

Title: Running batteryless ???
Post by: harneyguy on March 29, 2017, 06:45:45 pm
Hi guys ! Long time since being on here .. wanted to see if anyone could help me figure this out .. trying to run my 1951 Bsa c11g without a battery .. has anyone done this or had experience trying this ? Would really appreciate any and all help thank you !! This is my bike for point of reference
Title: Re: Running batteryless ???
Post by: ginantonik on March 30, 2017, 09:11:41 am
Can you confirm you running an Alternator.

There's plenty of data + personnel experience of running Alternator bikes without a battery, as for Dynamo driven bikes ?

Basically it comes down to rectification to convert from AC to DC, then some form of voltage control - as a Lucas Alternator can produce upwards of 30V when revved.

In the UK, on our CCM/B25/B50 we use a cheap (£12) Ebay 4wire rectifier/regulator - Wassel ignition (12V) and either a very small battery (2Ah), a capacitor (from an old TV) or nothing ................
The latter option came about when the battery fell off during an Enduro, and was'nt noticed until 2-3 hours later when loading bike onto trailer ..... Not certain if we'd recommend it, but they certainly start and run ok without anything!

I'd, tend to fit a large capacity, +50V Capacitor instead of nothing - it will help starting and replicates the non-battery LUCAS 'energy transfer' system without using rare Rotor/Stator/points-cam parts.

Rupert Ratio C15/B25 book - has an excellent chapter on this subject, as it was fitted to several C15/B40/B25/B44/B50 engines



Title: Re: Running batteryless ???
Post by: Owen on March 30, 2017, 12:05:58 pm
Well the picture looks like there is a dynamo in place. I do like the seat suspension!
Title: Re: Running batteryless ???
Post by: harneyguy on April 03, 2017, 07:42:36 am
Running the dynamo with a podtronic rectifier and a capacitor now
Title: Re: Running batteryless ???
Post by: Tman on April 03, 2017, 09:26:56 am
Why a rectifier with a dynamo? :-\
Title: Re: Running batteryless ???
Post by: camman3 on April 06, 2017, 07:49:31 pm
Whether it is your style or not, there is no denying there is a lot of fine work there.....I actually like it, the more I look at it :D
Graham
Title: Re: Running batteryless ???
Post by: Owen on April 06, 2017, 09:12:46 pm
As a concept it looks great. However, practical it is not with that hand change! IMHO.
Title: Re: Running batteryless ???
Post by: harneyguy on April 07, 2017, 02:45:37 pm
Soooooo interesting array of comments .. some helpful some utterly useless.. there's a theme in the motorcycle world and it's sestemic .. if it ain't what you think is correct that it couldn't possibly be true.. I know this sentiment all too well cause I participated in it as a builder. Short of safety concerns .. if you re not sure about a machines inner workings then ask questions .. don't make an assumption based on little marit... that just makes you the asshole... let me give some runway here ... I'm a structal engineer by trade.. I create and tune chassis for a living .. I joined this forum to get some feed back on some particulars about my machine... as for the for mentioned concerns ... you guys were correct about the lever but has since been rectified ... this bike has been gutted and blueprinted and improved .. I do not make trailer queens .. although very far from a race chassis .. it still falls in the premise of achieve a riding agenda... start, stop, go, brake, turn, shift... nothing more.. nothing less.. if you have real questions or answers please ask .. but do not assume .. it's not appreciated

PS. All offensive messages have now been removed by Admin (Pete)
Title: Re: Running batteryless ???
Post by: camman3 on April 07, 2017, 04:38:51 pm
I like it even more now :)
How did you correct the lever....friction plate?
Graham
Title: Re: Running batteryless ???
Post by: harneyguy on April 07, 2017, 07:13:25 pm
I preloaded the internal bearing and put an external spring on it so it acts more like an indexing lever then a sloppy shifter
Title: Re: Running batteryless ???
Post by: ianinglis on April 07, 2017, 10:15:30 pm
some funny folk on here HARNEYGUY - you will get used to us all eventually (if you stick it out that is) ;D


ian
Title: Re: Running batteryless ???
Post by: Pete on March 13, 2019, 10:07:57 am
Just found this thread. I must have been AWOL at the time. I've edited and removed most of it as it was quite abusive at times, and we never heard from Harveyguy again. Shame.
Very interesting bike in my view.
Pete
Title: Re: Running batteryless ???
Post by: MilitaryRon on March 13, 2019, 03:01:11 pm
Me too! I think I vaguely remember the bike and I also like it. But whether I liked it as a concept or not, I'm still very interested in the engineering expertise involved. I hope he comes back with updates.

The thing about a special (and I've built one as some of you know) is that there is no criteria to follow. You build what you want to suit your own eyes or needs.   Ron
Title: Re: Running batteryless ???
Post by: elevensies on March 14, 2019, 11:09:02 am
i really like it, and there is lots to like,

good work :)

Title: Re: Running batteryless ???
Post by: sidevalve on March 14, 2019, 05:22:06 pm
each to his own but not 100% sure about the no front mudguard thing over here. Even on a bicycle being constantly hosed down by dirty water can get a bit tiring and we do to get a lot of rain here -otherwise looks ok to me
Title: Re: Running batteryless ???
Post by: FrAlan on March 14, 2019, 09:33:42 pm
I like it, the whole idea of specials is that they are personal to the owner, one mans meat and all that.I have built several over the years including a bsa/triumph, constructed from the leftovers of a friends triton building efforts. Not the worlds finest motorcycle, but it cost nothing and we had lots of fun with it.
Title: Re: Running batteryless ???
Post by: Tman on March 14, 2019, 10:26:21 pm
Norton lump in a Triumph frame? Probably no worse than the Triton it became, in most riders' hands.
Title: Re: Running batteryless ???
Post by: MilitaryRon on March 15, 2019, 06:06:08 am
Norton lump in a Triumph frame? Probably no worse than the Triton it became, in most riders' hands.
Can't remember ever seeing that? It was nearly always a Triumph engine in a Norton Featherbed frame that was concidered the best of the marques for a cafe racer.  Ron
Title: Re: Running batteryless ???
Post by: Tman on March 15, 2019, 12:43:50 pm
There'd be no kudos with the "fast boys" in doing it, but probably just as fast in most peoples' hands (mine included!) It was just my first thought with FrAlan saying he was using up leftovers.
Title: Re: Running batteryless ???
Post by: timsdad on March 15, 2019, 05:23:39 pm
Some folk build some strange specials and I think it usually depends on what bits you've got laying around.

Back in the late '60s there was a bloke from Ipswich way who spent a huge amount of time and money building a Jayton - a 600 AJS motor in a Wideline frame. Also, in the '90s, a chap from the suburbs of Newmarket who put a 250 James engine in a little Honda frame.


Ray
Title: Re: Running batteryless ???
Post by: Donald on March 15, 2019, 06:46:16 pm
Back in the 70's I had a Berkley with a villiers 2stoke engine, with reverse gear, I cut it all out and fitted a mini front sub frame engine and gearbox, wonder what happened to it now.