Recent content by underdog

I am trying to put together the lightest possbile middrive from scratch. Going lower diameter RC motors will in general terms meen bigger kv ratings. So I guess my challenge is to find the ultimate solution in terms of total weight (and sice) including reductions... Does anybody have experience...

Happy to report that my long awaited new workshop is now opened. Some cool bikes are comming to life these days. Here is a couple of the works in progress...

http://pubs.rsc.org/en/content/articlepdf/2014/ra/c3ra47853j Old news? I Cant find any real good practical experiments, or results... Anyone? edit: "Carbon aerogels from bacterial nanocellulose as anodes for lithium ion batteries" Looking for "real world" test-results

Hello. Is that a MAC motor in the front? I am currently making a almost identical rear-wheel for a fatbike, what kine of spoke lenghts did you use in the front wheel? Regards Magnus

I have neglected to update anything for a long time. Waited for something modified enough :) Just completed building this badboy for a good friend of mine. Its a Gary Fisher Cake 1 frame, with BB7 200mm disks, manitou swinger in the back and 130mm Splice in the front. Running 24" 9C-clone...

You want one of the 50V packs from here: http://em3ev.com/store/index.php?route=product/category&path=35 Paul will sort you out. Good priced top quality packs! Go for the 20R-cell-packs if you want stupid-power 8)

NO... That is a by my experience a bad idea, no mather how carefull you are. Go for a desent BMS system, and a bulk-charger. Problem with balance charging, is that you are running unprotected when driving. While doing this I have killed 10% of my cells over a 30-day period (I only run up to 60...

Hello. I just recieved the beta-product. It has been tested and found working beautifully on some custom packs we had laying around in the shop. We want to mount it to our service-bike that we use to get around to our customers when service-calls is needed. If I have understood the information...

That is a genius idea. :) Do you have another good one for charge-rate?

Hello. Does this information-tag tell anybody something? I know it is supposed to be a 10Ah pouch. But I can not seem to find any information on the nett from that information tag... What I really need to know is what kind of C-rating it has...

1 vote for quote of the day! :lol:

Misinterpret me right :) I am happy for all help I get. I am sorry for misleading with the picture. I do now understand that the reason my charger did not start is still a mystery... I am not paranoid, but I feel that if one should posess lipo`s, one should understand and account for every...

Ok, I understand that I should have mentioned that this is a picture where the sense-wires are disconnected. I thought people would understand that I do not run the BMS without these. Just did not have a good picture of it complete connencted.... :wink:

I can wait to see where this build is going to end up. I am really looking forward to it :) When do you expect to start the build btw? Do you have any time schedule or estimated time of completion? If you are ever in the Oslo area feel free to come by my workshop.

Oki. Little update. I am seeing some wierd behaviour from my BMS system I think. The pack is constructed of The Good-priced 4s 20C Hardcase LiPo`s from HK. Two and two put upon each other and 12awg leads soldered together into 8awg. It has a D131 80A BMS and closed off with supersticky tape...