Probably yet another battery thread Q?. To bore you :)

[OldFart]

Waiting for the paint to dry between coats. Why does some plastic paint require less than an hour between coats or more than 48 hours?
2 tins from the same range one has different times between coats than the other. Boring

So my £20 "Thing" , Still unable to find out what it actually is/was

3 x 12v 10ah SLA batteries currently fitted. So i thought a 10s pack would be ideal. After reading
threads on here it seems that a Lithium battery of half the capacity of the SLA's may actually have
a similar range. Especially so with the SLA's being old.

With Xmas approaching and lots of bills looming i thought get a small pack to start with and see how it all works rather than spend all my money and find problems with the bike, controller or motor.

Not that simple is it. My charger will only do upto 6s and not a 10s. HK site didnt appear to have a 10s charger?

So it appears a pair of 5S cells is the easiest option. Either charge one at a time or get a 2nd B6 charger.

I can get a pair of 5s 4000 or 5000 mAh 20C ones for £50. If i have it right they will give similar range to the SLA batteries? But coming in with a gross weight of less than one 12v SLA.

Easy to add another pair of the same batteries to extend the range further. Best to have a voltage meter for each pack just in case? Especially when adding another set maybe 6 months down the line?

Flaws in my plan? Thanks.

 

[OldFart]

What do you guys use to charge your 10s and 12s packs?

Struggling to find something suitable. Without having 2 chargers on the go at once. But it seems like the chargers are best sync'd together to balance between packs also.

My B6 does not do that.

 

[Geebee]

I just charge one pack at a time.

 

[OldFart]

Just spotted that some 10s packs are actually 2 x 5s packs in one case.

Are they all like that? The HK website doesnt explain very well. Only found that by one comment by a customer.

Would there be any advantage by going to a 25C or 30C over a 20C? Considering the bike i have is an old thing with just a basic 36v DC controller. Not a fancy motor with phases etc.

Having no luck in finding out who made my "Thing". Contacted the shop whose label was on it and they know nothing about it. Claim to never having seen it.
Maybe its older than the speed controller?

Thanks

 

[Geebee]

I just use 20c ones even with a 5 amp battery you are still looking at a 100amp output, or about 4kw constant
I have run my Tonaro on a 36v 5 amp Hobby king LiPo and there was close to zero voltage drop at maximum power of 17amps, gives the bike more punch than the original 36v 10a pack.

 

[OldFart]

Going with the 5s packs. Cannot be bothered to mess with the 10s ones if they come with only one a + & - leads and not 2 packs as one.

They need to make the item info clearer.

£15 extra going from 4000 mAh to 5000 mAh.. Argghhhh my head hurts..

If i bought enough for 20Ah. The 4000 would be cheaper... Too late i have gone that option now. Ordered a pair to see how it copes.

I need to finish painting it and put it back together first though.

Thanks for putting up with my silly questions

 

[Kinninvie]

I use Multistar 10C batteries on my BBS02.750W,25A and although they are only 10C they work perfectly so 20C is more than enough for you.
I charge mine with 2 chargers,a £25 Accucel6 and a £14 ImaxB6.
I always put the Imax charged battery on the Accucel when its charged just to double check it as it seems the more accurate of the 2.
My Battery Medic has just arrived so I can use this in future for accuracy.

 

[awol]

You can charge both 6s packs together on one charger using one of these parallel balance boards, choosing one which matches the connectors on your battery. It does take longer to charge though and the batteries must both be disconnected from each other and totally seperate before connecting to the board. They should also be about the same voltage too.

http://www.hobbyking.co.uk/hobbyking/store/RC_PRODUCT_SEARCH.asp?strSearch=parallel+board

 

[Kinninvie]

It takes me 6 hours to charge my batteries with the above chargers.
If I used a balance board I could only use 1 charger so it would take 12 hours

 

[OldFart]

Thanks for the tips, The packs i bought are only 4Ah, £15 less than the 5Ah packs.
Should make it more affordable to jump upto 8Ah if everything goes to plan.

From what i have read the 8Ah ones will give more power and a longer run than the SLA 10Ah cells. Probably still a 1/3rd of the weight also.

The 4Ah come in at less than 1/6th of the weight.

Painting everything is slow going. The hammerite seems to take forever to dry.

Any tips on painting wheels? How do you prevent the rim from rusting or going porous? Rear wheel is not a problem band brake. But teh front uses standard V brakes.

Thanks.

 

[Geebee]

Any tips on painting wheels? How do you prevent the rim from rusting or going porous? Rear wheel is not a problem band brake. But teh front uses standard V brakes.

Thanks.

The wheels look like my old ones, if so they are aluminium with a matt/rough finish, if so rust should not be a problem.
Personally I wouldn't paint them, they usually end up looking cr.p after a bit of use.
Maybe steel wool around the braking surface?

 

[OldFart]

Yeah, That was my plan. Just wirewool them.

It may not be a speed machine, But i would like it to stop sooner rather than later.

The wheels actually look painted. Will double check tomorrow.

Just curious is there is anything to protect the rim, Bearing in mind that area is used for the brakes, So no shiny slippery surfaces.

Spotted a link to some brake rubbers, But not sure where. Only £2.99.

Anything to avoid? They are only 2" long, (18" wheel on the bike) Can i go bigger or will they foul the tyre or miss some of the rim?

Thanks again.

 

[Geebee]

Yeah, That was my plan. Just wirewool them.

It may not be a speed machine, But i would like it to stop sooner rather than later.

The wheels actually look painted. Will double check tomorrow.

Just curious is there is anything to protect the rim, Bearing in mind that area is used for the brakes, So no shiny slippery surfaces.

Spotted a link to some brake rubbers, But not sure where. Only £2.99.

Anything to avoid? They are only 2" long, (18" wheel on the bike) Can i go bigger or will they foul the tyre or miss some of the rim?

Thanks again.

I would not put anything on the baking surface at all.
Any cantilver pad should be fine, but as you say maybe not long ones, but my wheels were 16"
The brakes on mine were adequate once bedded in, but you needed both brakes working well if you were on hills.
Oh and the band brake wont hold rolling backwards if stopped on a hill.

 

[OldFart]

Sellers seem to miss the obvious and do not put dimensions in the info.

Some appear to be super skinny for thin walled racing bikes. I chose some short thick looking ones and some longer type that come with a holder.

The current blocks are like plastic. Rock hard, And i can see slithers of paint/aluminium embedded also.