Endless Sphere

Whether or not any particular poster feels that a certain thread is in the middle of a flame-war usually depends on who's thread it is. Any loosening of the customary actions used to slow down and hopefully avoid a flame-war will certainly spread in all directions. Members have often been asked to ...

With phase to phase resistance, no load current at two voltage levels, KV and motor weight the motor can be characterised and performance accurately predicted at virtually any input conditions. Extensive batteries of tests aren't strictly needed, but feel free to do then anyway Easiest way to measur...

Well I think Tesla’s are already in deep 10 seconds, maybe high 9 seconds. Their Problem is The Big braking system! They need 19“ rims and there is existing no good drag Tyre for this dimension. Well I also hope to get into the 9 seconds range. I think the system power should be good enough for it....

You must be aiming for sub 10's on the strip? I just love how you keep upping the game. For sure your old strip record will be crushed by the new beast. Tesla's are low 11's, right? Bet you can smoke a tesla this fall. With this power and torque potential, end state would be a lot, lot quicker than...

...Things have been a little “hot” around here lately ! I have been dodging bushfires, no power , no internet, no phones, no roads out ! ... one hell of a Xmas and new year ! :shock: Now we have a bunch of F..wit Politicians and instant climate experts claiming that climate change ( increase in CO2...

You would be better served by sticking to a 20s/84v maximum voltage and running a Nucular 24f controller with a fast wind. This is the current 'sweet spot' for highly reliable, high performance and feature rich controllers at an affordable price (given all of the functionality). Higher KV motor resu...

Let me throw in my complete agreement with the sentiment from John, larsb and others. I've attempted to not let this get under my skin, but as another example of a good thread gone bad - My Mobipus controller discussion completely turned to crap and was unceremoniously locked without comment over a ...

What weight/power is this bike designed to? If it's a lightweight 'bicycle' type build, then voltage >100v is unneccessary and undesirable, as more than enough performance is possible with ~80v than is possible to keep on the ground. If you're referring to a full size motorcycle build, then addition...

What is the achievable stall current (at zero rpm, locked motor / standstill) with the Nucular 12 and 24fet? I am asking since this really is a key performance factor for the hotrodding people. I'm pretty sure you can play around with the settings related to the "clutch" function to achieve launche...

Ohbse, did you order your 24Fet controller specifically to fit inside Sur-Ron controller? Was there any issues with gutting the Sur-ron stock controller? What do you mean trimming back the plastic pieces? Would you be able to put back your sur-ron original controller in the sur-ron housing if you n...

Keep things civil please. That's what I would prefer too. There's zero point in deliberately undermining people. No point in it at all...giant waste of everyone's time. IMHO...it's completely unproductive in every way. And yet there is a point - you were mistaken, it was explained why you were mist...

Vasili is currently developing a bms 24s so I think that Nuculars electronics controllers are ready to accept this voltage. Maybe you will need to update the firmware. The 24s is for other chemistries with lower voltage such as lifepo4. Definitely would not recommend going above 20 or 21s, as EG sa...

Agreed the rating on that pack is extremely dubious. I've built a lot of 30q packs and would never specify a 10p pack as 200a continuous. With that topology and density I suspect it would get pretty toasty at half that. 20a single cell discharge in free air gets to 80c before it's done. In other new...

Not relevant to your original question - but the speedo calibration on the road legal surron is highly optimistic. You can actually alter the speedo ratio on the display and correct the speed by powering on the bike while holding one of the buttons on the display. I've changed mine from 1.0:1 to 1.1...

Nope - because I still haven't progressed this project any further than my last post.

Instead I bought a Surron l1e and got it road legal, now I'm modifying that instead.

I still want to do the Madass - but that's going to have to wait until I've built a new workshop.

? Are you suggesting they never ran a full lap ? But they just spent several days there running laps with the stated intention of setting a time. So why no time posted ? Not even an “unofficial” time ? They were happy to post a time for Laguna At least they qualified for the “Bongard” club. ! No ti...

Based on my experience and research on battery thermal management, Tesla has done a very good job with the system they are working with, but it is by no means the best. It has been optimised for the task (driving a 2 ton saloon car down the road a long way) and it does that very well. But more supe...

But we know the “S”has always had an issue with thermal build up in their pack (and the motor.) Those issues are magnified at higher power levels (amps !) Induction motors are capable of huge burst power but have inherent thermal limitations with rotor cooling, the model S is a well optimised syste...

It's possible there are thermal advantages from the higher voltage relative to other inverter tech available to Porsche but it can't be assumed.. generally higher voltage capable silicon has a proportional increase in resistance. There are 'sweet spots' where system efficiency peaks and perhaps 800v...

A great article with some very interesting details. Standout for me is the large number of additional components when compared to the Tesla drivetrain. In particular comparing Taycan to the construction of the Model 3 there's a lot of additional complexity. The transmission, multi plate clutch, actu...

Unless you have a controller with >100v rating, then moving to 24s will most likely end in disappointment with a fried controller. There are many tales of people getting away with it for a period of time in the pursuit of peak performance, but that's not really relevant any more in this age of more ...

It's been 2.5 years since i posted that little blurb on sealing your hub.. for anybody new to this now, much has changed - just go buy some statorade and enjoy the same result with no mess!

Pretty obvious from their videos and marketing materials that their initial market will be "upscale" -- i.e. military, industrial, aeronautics, and certain construction technologies where there would be a premium for fail-safe operation. I can't see them moving downscale anytime soon. First product...

My long term around town average energy consumption is about 52wh/mile over the past 20,000km. That's rapid acceleration, 35-40 mph cruise, bike weight of 42kg, QA v3 in 17" rim, 18650 pack, 20s 36ah from Samsung 30q cells. Top speed is >70mph. Power peak is around 12kw in daily ridden form. I weigh...

Root cause is Kelly are rubbish, I feel like we need a sticky at the top of the board with a PSA about their issues. Random detonations are par for the course unfortunately... People luck out and get one that won't explode and post positively about the experience, but unfortunately there are a lot m...