Endless Sphere

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

should be welding soon. i modified the design yet again

motor's gonna bolt onto that plate. chain tension adjustment by moving motor forward/back. greatly simplifies the rear axle parts

swingarm-mounted motor also eliminates chain growth issues

careful w/ disconnecting the wires from the BMS. some of them shutdown permanently if they detect any unusual voltages from the sense lines so you may have to do a "live" transplant

and many notebooks use 4.3 or 4.35v cells so you have to be careful not to use 4.2v cells

i've decided to mount the motor on the swingarm but still coaxial w/ swingarm pivot

testing the drivetrain. it's quieter than i expected

https://www.aliexpress.com/item/ZOOM-Al ... 81729.html

they're like cheaper TRP Spykes

any thoughts?

cheap coil shocks can be simple w/ no damping

but some cheap ones w/ some rebound damping have primitive designs that have "spiking" issues i.e. very harsh on high-speed hits

https://ae01.alicdn.com/kf/HTB1nvswOpXXXXaXXpXXq6xXFXXXP/227166762/HTB1nvswOpXXXXaXXpXXq6xXFXXXP.jpg?size=453259&height=1689&width=1000&hash=50e7e38e6b64b35189cfda02c0b57cd6 https://ae01.alicdn.com/kf/HTB1.jjnLXXXXXbQXXXXq6xXFXXXz/227166762/HTB1.jjnLXXXXXbQXXXXq6xXFXXXz.jpg?size=500176&height=1718&...

https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Hyundai_Eos_GL_2014_%2811954748753%29.jpg/280px-Hyundai_Eos_GL_2014_%2811954748753%29.jpg hi qsmotor. i'm thinking of putting two of your e-car hubmotors to the rear of this small Hyundai Eon, while keeping the engine to drive the front whee...

haha actually my question is how many amps is needed to start this small 1.5L engine. that's all i need to know, i can deal w/ cell selection myself

think honda jazz engine, or hyundai accent

the objective is to use as few cells as possible

ford ecosport 1.5 liter gasoline

how many amps do i need to start this?

i'm thinking Sony VTC5A or the cheaper LG HB6

this is the only sure way. visual methods not reliable

https://endless-sphere.com/forums/viewtopic.php?t=87798

just watched this vid. apparently the TP5000 performs better... gotta look for TP5000 then

as mentioned earlier these are FAKE tp4056 chips. accuracy is a lot worse than i expected, they range from 4.11 to 4.25. totally unacceptable :roll: so i'll be ordering these TP5100 modules. the 2A charging current should be a big plus. switchmode so cooler running. google doesn't turn up anything f...

a high number of interconnects isn't inherently less safe. actually this is something that is easy to get right :roll: however a lot of things can and do go wrong w/ poorly designed 18650 packs. the metal can itself is one huge negative terminal covered by super thin PVC. have just a little chafing ...