Endless Sphere

finalizing the geometry...

machined the head tube...

25R is supposed to be an NCA cell so calendar life should be good. i have several dozen panasonic NCR 2900's (NCA chemistry) from 8years ago that are still performing almost like new.

do a discharge graph to see if they're still performing like new:

so i just got a batch of Sanyo GA's and needed to verify... needless to say they're 100% legit

Looks really neat - how far can you go on a full charge? So is that right the BBS02 would be the best option for a full suspension; lightweight e-bike, floating typ of e-bike in comparison to all the hub-drive bikes out there? I really want to get an e-bike or build one myself; I am living in Germa...

bbs02

34t chainring

42t granny

haha yeah it's too late for me to change my leverage ratio :lol: my swingarm has more leverage on the shock than yours so i might need a harder spring: https://em3ev.com/shop/dnm-burner-rcp3-spring/?currency=USD BTW when you sit on your bike what % of sag do you get at the rear shock? i'm actually a...

very nice project!

your BOM links to a DNM shock w/ 550 pound spring. is it too soft for your build? i'm curious because i'll be using a 550 pound also, but 220mm

check out the Rockshox Domain dual-crown. these have steel stanchions. should be quite tough

This build is looking really good! I would like to try a motorcycle rear hub for my OpenEmoto project. ( https://endless-sphere.com/forums/viewtopic.php?f=28&t=92563&hilit=openemoto ). Yours look very lightweight but strong. Do you know where to get it online? Or a model number? Or which motorcycle...

Swingarm looking strong and solid. I also like the design. How is the drag (or cogging) of the drive compared to a hubmotor? Do you plan to use regen? tbh i haven't even ridden a hub motor :lol: so i have no idea yes i'm planning to get something w/ regen even just to save the brake pads. that's an...

someone can guide me i will appreciate: havving a problem with the new BHT 60v 1200w 0.35mm lams motor seems unstable after about 50%/60% of throtle already tried 2 kellys , hall sensors have good readings, from 0 to 5v spining the motor and about 12v in certain positions with the green blue and ye...

thanks. gotta get to work on the rest of the frame. this seems useful

http://cq.cx/tubejoin.pl

flux core is such a dirty process

13s4p Sanyo GA pack. discharged w/ 6.8ohm load. pack was used on a BBS02 w/ over 4000km

i'm still getting 95% of original capacity

same 6.8ohm load

i'm still getting 95% of original capacity after 14 months and over 4000km

new X-fusion rear shock, and testing a different fork:

The Stig wrote: ↑

Apr 03, 2018 5:15 pm

Hi Overclocker,

I just wanted to confirm: which website did you buy the BHT motor from?

https://www.e-bike-diffusion.com

but i'm not sure if it's still available

zero calculations made w/ this build (except for RPM calculations) :lol: it's all based on intuition :roll: Yeah i do it the same way most of the time, but sometimes it's deeply interesting to know some values :) yeah it would be great to be able to do finite element analysis and such. instead of t...

i have older NCR with dotted wrapper. some of them are clocking in at over 2900mah at 1C (2.9A discharge). that's more than advertised capacity after like 8 years

the motor can slide forward/back to adjust chain tension. i probably have to torque those bolts really hard though to keep the motor from "creeping" Did you do calculations for the maximum pulling force on the motor? The controller phase amps multiplied with kT will give you max motor torque. From ...

Cool project! I'm a big fan of frames with lots of steel tube fabrication. Hope the rest of the frame looks like the swingarm so far. You could add a plate on the other side of the thin slotted motor mount area. Drill holes the same as your motor mount bolt pattern and use set-screws to set the cha...

i'll add some gussets to stiffen it up

the motor can slide forward/back to adjust chain tension. i probably have to torque those bolts really hard though to keep the motor from "creeping"

skeetab5780 wrote: ↑

Mar 30, 2018 8:44 am

Nice fab skills man, looking really nice

i'm getting concerned about the strength of my motor mounting plate. it's 2.8mm mild steel. you think it'll hold up?

i think you had you had issues w/ bending your motor mounts in one of your vids

minde28383 wrote: ↑

Mar 18, 2018 4:23 pm

I see, but how much you paid for it?

probably something like us$25

minde28383 wrote: ↑

Mar 18, 2018 10:43 am

how much you pay (in usd or euros) for your rear hub? Can I see it for sale on some web shop?

it's an aftermarket hub for a certain 150cc motorcycle. i purchased it from a local shop, not online