cruzxia wrote:Hyena, Great looking fighter you have there, I bet it flys at 7kw. I like your balance connector idea 1 plug is the way to go. That is a rapid charging plan you have. Is your charger adjustable (current wise), Charging a a lower rate when you are not in a rush, will prolong cell life.
Yeah she goes OK
Previously when out chasing dirt bikes and crawling over steep, rough terrain and thick mud (ie the worst thing you can do for any hub motor, let alone a higher speed wind) it got quite hot, not enough to burn my hand instantly but enough I couldn't keep it on the cover. After some hard riding yesterday it was barely warm so the air cooling has really helped. I don't really need any more top speed but I might up the voltage to 24S with a small external booster pack. I like round numbers and 10kw has a nice ring to it
6S 18ah will sit nicely in the low dip on the top of the frame and I can easily wire my charge port with a series link that can be removed to plugged in the extra booster voltage.
And yeah I have multiple chargers - the isolated balance charger (which could do the whole pack if I wanted) Also a 4 amp 18S bulk charger for slow, usually over night charging or when I'm not in a hurry. This charges to 75v (~4.16v/cell) and then if I'm going on a big ride like yesterday I'll balance charge it up to 4.19v. Incidently I used 16.5ah of the 18ah pack yesterday (doing 42km) and the cells were all well balanced at 3.5v at the end.
I also have a 20 amp 6S bulk charger (for parallel charging each sub pack @ 6.5a) and a 32 amp 6S bulk charger (for parallel charging each sub pack @ just over 10a) both of which are well under 1C so will be gentle on the packs. The big 2400w charger is just for the occasional fast recharge or as a charging station for doing multiple bikes at once. Like yesterday on the Sydney group ride, all the the bikes built by me run on 18S so I could have recharged all 3 of our bikes while stopped for lunch.
Nice work Hyena.
I think this bike is arguably the number 1 hub powered
ebike on the forum (in my opinion
Thanks mate, that's quite a compliment from someone with 2 very sweet custom stealths himself
And thanks Rix and Cruzxia for the compliments too.
Rix wrote:WOW!! Your fighter is Awsome! That thing looks wicked with the vented hub and the zock forks. 7KW with 18s. I am guessing between 90 and 100 amps. Got Torque?
Yep running around 100 amp limit. Being a fairly high speed wind it doesn't have a mountain of torque off the line, which is kind of good in a way as you don't have to worry about it flipping you off the back if you lean on the throttle too hard. But if you want to wheelie it a sharp jab of full throttle will do it. The triple clamp forks actually make for quite a heavy front end. I built a bike for a bloke recently with a giant reign xo and it was stupidly light - I could literally lift it with 2 fingers. It had a fox shock and carbon rims and spokes and just steering the bike around my workshop by the bars made it pull up in the air a few times. Crazy. Whacking a big H40 motor and 15ah of 18S lipo on there cured it's anorexia but I can only imagine what it'd be like with a light weight RC drive set up.