Endless Sphere

To the "Quiescent current" part - it is a more thoughtful approach to introduce a configurable disconnect timer, rather than than pinch pennies trying to extend a shelf-life of a battery with a hooked-up BMS, IMHO. What is BMS going to do if it senses a battery voltage going down ? Zilch,...

Let's turn those specs into engineering terms for the fun of it: 13S to 24S BMS would probably need to be divisible by 12 or at least 4. My take is a stackable BMS of 4s or 6s. 10Ah to 20Ah Does not really matter. Though it will drive your design specs below Discharge Currents from 20A - 80A nominal...

I think the problem is cheap.

I have looked and specced out a possible BMS designed that would work, but cost would be high, unless I can get huge quantities.

It really depends on the market. You wouldnt start an ebike company in the midwest where it gets cold and hot and everything is miles out. You would ideally find the market that needs such device. I.e. congested no parking easy bike parking safe slow traffic area. Then ask yourself why a regular bik...

That link you posted is really hard to navigate and tell where you are in it... This is the one I was talking about. http://s29.postimg.org/j6pv1n8vb/falco_no_tomorrow.jpg Let me address falco motor on some of these advertising point. Torque Density --- I am not convinced. Maybe more flat torque de...

Thanks for the links. Really the only reason is not how fastbut how long and far. With maybe a reduction in air drag, you can go for longer and use less battery this is better fit for touring. But yes i wonder ehat the max record is for electric. There is a record for electric car, and it has all th...

The trisled is a good and cheap start but it is not full suspension. I was considering the quest and using the ecospeed mount mid-drive. But those two combo will set me back more 15K USD no counting the extra stuff like CA controller battery etc. Man making a really efficient transportation can get ...

I am rethinking a touring trip with a velomobile to gain more aero dynamic advantage. Has anyone electrify a velomobile? What are the things to watch out for? What is the max speed you can obtain? Mid-drive vs hub drive. Pedal assist or just pure electric? Bigger battery or smaller and pedal assist ...

My question is if the FETs goes out, do you need to replace all the FETs or just the one that goes out. If just one, how do you determine which one it is? I think it would be more economical like someone here pointed out to provide extra FETs or extra discharge boards with or without FETs populated....

I am also tempted to put down some mo ey to support them, but even at 3000 it is a bit risky for what i have plan for it. Here is why: 1) heavy. 100+lbs and this is pretty heavy without motor battery etc. 2) aero is not that great. If you plan to ride it in the city and short commute, then fine, oth...

I have to admit the model s impressive. It was keeping up with thd bike for most of the track until the near end. I guess if tesla can work on upping the 30-60mph acceleration, it might keep up with the bike. But yeah that much power on a bike that can flip if you throttle too much takes guts to rid...

Any good 3000KW+ motor in 135mm dropout? Do you mean 3000W? If yes, it's not possible to make 3000W motor in 135mm dropout. As the maximum magnet height is 28mm. The rated power is 500W, peak power could be about 3000W for few second. P.S.: Some supplier might call it 3000W, as the peak power might...

If you want a reliable bike just go slow. Most of the problems people are having here are related to high power ebikes. Over engineer and keep the power low (and speed low) and you will be riding for a long time without problems. Now you do have to take jnto consideration the usual bike related prob...

Any good 3000KW+ motor in 135mm dropout?

I have hobbyking nanotech lipo and it is roughly 50%-60% now. It has been more than 3 years and it still go on chucking. Since it is lipo the internal resistance is still in check. It does sag a bit compared to when it is new but recovers fine and still provide at least 50% easy assuming you fully c...

@ marcibs,

Thanks for the recommendation. Tubeless seems a bit messy. How well do they work compared to inner lining with thick inner tube?

@ecross

Do the gaadi come in 20 inch version? I plan to build my rear in 20 inch version presta.

One more issue that just occurred to me. Flat tires. How would one deal with flat tires. Last time I had a flat on my ebike, I had to flip the bike to reload the wheel back onto the dropout. I don't see me flipping the trike if that occurs. How would you guys deal with flat tires on this thing?

In my experience electrifying a bent makes a huge difference in riding ease, the low speed wobblies while taking off and climbing steeper hills become a non-issue, it is also no longer necessary to shift many gears down at every stop, creeping in traffic is a simple matter of letting your feet slid...

Hi mvly, please send more infos to your trip, this is very interesting for me because my e-Trike is ready for +200km with my setup. -attached you will find a pic. from my e-Stein Trike Wild-One with 2x black outdoor cases for 2 x 12S8P Sony setup and my new outdoor cases are ready for 2 x 12S16P. -...

Hi mvly, in the season 2014 I drove a looklike setup like you plan for your 200 miles ride a day. I use a HPvelotechnik and a Stein-WO Trike. Attached you will find some pics from the Trikes. Whitch Trike models will do you use for your trip? For this, HP and Stein I can give you a lot of tips for ...

That is a nice trike you got there. I was planning a Scorpion FS 20 instead of the 26 just so I can have a 20 inch rim and run higher rpm motor and get higher efficiency when accelerating/climbing hills. If you want the best cells, I would go with tesla's cells if you can afford it. Super light and ...

You are going to be at the weight of two people on a bike and a good bit of bulky gear, why not go with a tandem bent in the first place? For one thing a longer bike has less need of suspension and is more stable at speed, I ride a long wheelbase e-bent without suspension but with Big Apple balloon...

Hi mvly, in the season 2014 I drove a looklike setup like you plan for your 200 miles ride a day. I use a HPvelotechnik and a Stein-WO Trike. Attached you will find some pics from the Trikes. Whitch Trike models will do you use for your trip? For this, HP and Stein I can give you a lot of tips for ...

Get ready to Grind. For sure the guy to talk to is Grindz. No doubt you did see this http://endless-sphere.com/forums/viewtopic.php?f=3&t=61893 IMO, the big thing he learned on his trip was to not push so hard for miles per day, allow more time for a trip that long. Watching all his you tube vi...

I am contemplating a new build. This time for a touring bike/trike. I was wondering if there are any others who have went down this path and would like to offer their wisdom on this matter. First off the requirements: 1) 200 miles per day 2) 8 hours max riding time per day 3) 25mph average per day m...