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Oset Trial Bike Power Aaaaarrrgh!


louie b
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Can anyone point me in the right direction re; turnigy 5.0 5000 mah ?

I've seen these being used on oset20 bikes but can't find out which balanced charger or lead to use? I've looked on hobby king website but it's a bloody minefield helppp :(

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I know very little about the Osets but I do know a little about electric model flying, Hobbyking and lipos.

5.0 is 5000mAH. You need to know how many volts you need to work out how many cells the battery needs.

From what is in stock in the UK warehouse (check you don't get international you might have to pay import tax) this charger is very good for the price http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=28146&aff=1070348

Its 12volt so you will need to run it from a car battery or power supply. (I made mine from a PC PSU)

Or this one is 240 http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=49452&aff=1070348

Let me know the voltage battery's you need and the max Amps that will be drawn by the motor and I can find you the batteries.

Edited by richfr
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Thanks richfr

The batteries on the oset are 4x12v motorcycle batteries

Wired in series .I've seen these. 5.0 5000 mah working fine

In oset bikes I want correct charger and patch lead as I've heard

These batteries are dangerous if overcharged or drained below 50%

?? If you can help me with advice that would be appreciated thanks

Louie..

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everything you need to know about the use of lipos is in this thread http://www.trialscentral.com/forums/topic/34845-oset-batteries-lithium-lipo-conversion-directions/

HK also now do a lifepo4 chemistry rc battery ( a little less of a fire risk but you still have to treat with respect ) they are a little more expensive but I think worth the extra as they tend to be a little more forgiving chemistry...

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Thanks richfr

The batteries on the oset are 4x12v motorcycle batteries

Wired in series .I've seen these. 5.0 5000 mah working fine

In oset bikes I want correct charger and patch lead as I've heard

These batteries are dangerous if overcharged or drained below 50%

?? If you can help me with advice that would be appreciated thanks

Louie..

But what voltage is the motor 24v? I cant find any reference to how many amps the motors draw on 6s lipos. Maybe a power meter would be a good idea to test its within limits http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=28713&aff=1070348

The chargers I listed will balance charge them correctly.

I would also wire on the bike a voltage checker and alarm to tell you when they need charging keep within safe limits.

Life batteries don't like high discharge rates so may not work.

If its 24v these batteries will do it http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=32211&aff=1070348 they are in a hard case so not damaged as easily and rated 30c discharge.

You will need some power connectors these are really good http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=46611&aff=1070348

And a series connector http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=31809&aff=1070348

Balance charger lead if you want to charge 2 together http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=9910&aff=1070348 (but cant find them in UK store)

Bag to keep/charge the batteries in http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=66381&aff=1070348 just adds a little safety

Voltage monitor http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=44508&aff=1070348

Also need some cable and heat shrink to connect it all up.

Not sure how the osset turns on etc but good idea to have a battery shut off.

Hope this helps.

Edited by richfr
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The lifepo4 battery's that hk sell are rated at 30c so more than good enough ...

if its 4X 12v battery's wired in series then its 48v ,

A watt meter is a very good investment for anyone with a oset ( or any electric bike ) no matter what chemistry you are using.

if you do use cell monitors on the battery's then don't leave them connected when not in use as they will drain your battery..

Edit:

If you are going for lipo then for a 48v 10Ah battery you will need a total of 12cells and if you go for the 5000mah lipos then each cell will need to be paralleled to make a 10000mah battery

if you go for lifepo4 then you will need a total of 16cells for 48v , I would go for 4x 4cell packs , the lifpo4 batterys are 8000mah

Edited by gwhy
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