Endless Sphere

What about a BionX D with external controller? https://endless-sphere.com/forums/viewtopic.php?t=90037 Motor weights just 4kg and with a 20s battery should easily reach 50km/h. I don't know if you would be happy with the maximum torque, I assume 60-80A phase current should be a sensible limit and th...

I don't know about any other solar bikes but my trailer handles like a dream. I can tuck into corners at high speed. With a fully loaded bike, I can barely tell it's even there except for some rattling sounds I can't seem to eliminate. I've had it up to 36 mph (58 kph) on a steep, narrow, twisty do...

That's a sweet ride. My sincerest condolences on your loss. Rest in peace, Bionx. No big deal. I have enough BionX hardware to last for the next 15-20 years and also the sweet BionX Development software :-) It's quite complicated to build a street legal speed-Pedelec over here, there are not so man...

Given the choice between carrying a 2 kg heatsink and having a bike that's 2 kg lighter, I know what I would choose in that situation. Oh, I'm a fan of reducing weight, too. This is my street legal speed pedelec which goes 45km/h (53km/h without v-max reduction) and weights just 19.5kg with fenders...

Nice. Haven't seen that one before. My Nomex (aramid) honeycomb core panel in the video above came in at 1.2 kg/m² with 5.5 oz/yd² (186 g/m²) cloth on both sides and my second test was 1.0 kg/m² with a lighter cloth on one side. Given the Sunpower Gen III cell temperature coefficient of power is -0...

This is what I plan to use to stabilize my "semiflexible" solar modules. It's called Metawell Aluflex, it's made of aluminum and weights around 2,2kg/m²: https://www.metawell.com/wp-content/uploads/2016/02/de_aluflex_hl_05-02_hl_h47.pdf (sorry, datasheet is in German) It's bendable in one direction,...

.... It'll take a lot of additional rework of this trip analyzer web app to present multi-day log files in a way that is easier to visualize since the graph data quickly gets quite noisy, but that's something we'll be working on over the summer so that by the time the race is done we'll be able to ...

BobG wrote: ↑

Jun 09, 2018 5:23 pm

Not good news Cephalotus. Here's the latest report dated June 8, 2018.

Thank you.

Any news?

"....At the site of Germany’s Arbeitgeberverband (Federation for German Employers) Dr. Björn Peters wrote a piece... .... The technological components of an energy supply system based on sun and wind first need to be developed... Widespread e-mobility “will take decades”... On e-mobility, Peters co...

Mirrors are a good idea. It will take not much time and your cells will develop hotspots because of the mirrors concentrating light unevenly on them and some cells will see reverse current and additional heat thats extra heat to the additional heat from the mirrors which is extra heat to the already...

The advantage compared to a bicycle without any motor is...

???

(with the MTB you used it can not be efficiency)

All my bikes use 9 gear systems, most of them 3x9 gears and I use the whole range. I even try to optimze gears, i.e. in my speed pedelec I prefer low increments between gears. This is the planned setup with a modified 26-38-48 chainring and a 11-12-13-14-16-18-21-24-28 cassette. 85rpm cadenze, 40-62...

For me the cheap stuff doesn't work. I do not need fetish componts (let's say Shimao XTR stuff) , but mostly solid middle class does the job nicecly, sometimes I prefer even higher end componentes, i.e. tires (imho you get the most bang for the buck on a biycle from the tires, so I buy only the best...

A battery pack will burn at 800-1000°C. Wrapping it in that stuff will make a dangerous and toxic fire i9nto a dangerous and very toxic fire. Themal runaway prevention should be done on a cell by cell base. This is an important security advantage of using small 18650 cells, 99.99% of battery cell bu...

Hey Cephalotus, that IR picture showing the microcracks is super interesting. Can you elaborate on how exactly the image was taken, were you basically looking at the panel with an IR camera from behind with the sun shining through on the other side to provide the IR luminence or some other techniqu...

The point is that you can have cell with 15 years and 5000 full cycles lifetime based on almost all known chemistries, but not with the high energy density. NCA, NMC, LFP and even LCO can be designed for this conditions but the volumetric density will be 350 Wh/l at best. If you need 700 Wh/l or mo...

Right. In the Leaf we were talking about large format NMC cells. Yes the leaf cells had a Problem with high temperatures. One or a few bad examples are no proof that the Claim is wrong. A PV modul lasts 30 years+, but there have been moduls around that got defective after 1 year. So what? You might...

It could be now that Elon has hands on the details of 21700 cell manufacturing that it could be this special release 200KWh roaster will have especially expensive lithium cells that have more cobalt etc in them then is typically considered financially viable, thus giving them super performance. My ...

A modern battery cell will last 2.000 to 5.000 full cycles. Li-ion batteries last 500 full cycles, 1000 if you baby them. A NMC 333 automotive quality cell should last around 15 years and 5.000 cycles. Cycle life performance in NMC 622, NMC 811 and NCA is reduced, as far as I know. NCA has good cal...

.....It is bad because a 200kWh battery will weight 700kg+ ...... :shock: :?: Tesla's 100kWh pack already weighs 650 kg !!s. I included future improvements. obviously adding a 1300kg 200kWh battery to a "sports car" would sound even more nonsense to me. Maybe Musk builds to many rockets to get a bi...

A blanket statement saying that 200kwh in a single car battery is bad for the environment has no meaning as we don't know the production process of said future battery. If it's made at a solar power gigafactory than it might be 100% environmentaly friendly. It is bad because a 200kWh battery will w...

Tesla superchargers are working fine! I had a model S for the winter and I know many people with Model S and X's they have no charging problems to speak of. IN fact they have raised the Supercharger to 135kw in some places. In time that will go even higher. Like when the 200kwh Model S comes to mar...

It is surprising that Telsa is moving to rare earth magnets, this is not good for mass production or green manufacturing. The only reason is to increase the range slightly, at a considerable cost and reduction in "green value" for a vehicle that is supposed to be green. Rare Earth are not "rare"......

Would be interesting to see how German subsidies support those prices. There is only subsidies for the end consumer and this is not included in the selling price and independent of the manufacturer. But I do include all peripheral components plus installation cost in the price. One factor of the Te...