Search found 4942 matches

by Punx0r
Feb 28 2020 4:09am
Forum: Motor Technology
Topic: Parametric axial flux YASA model
Replies: 2
Views: 750

Re: Parametric axial flux YASA model

Interesting! :thumb:
by Punx0r
Feb 28 2020 4:05am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 6296
Views: 346716

Re: Wind and Solar vs Coal, Gasoline, Nuclear

So potentially twice the efficiency of a normal coal fired power plant but likely to need the fuel gasifying first and the resulting CO2 sequestering. Sounds expensive. Might be useful as an alternative to gas turbine or piston engined peak shavers, backup or remote site power.
by Punx0r
Feb 27 2020 4:12am
Forum: Large EV General Discussion
Topic: Will this vehicle ever exist
Replies: 8
Views: 1365

Re: Will this vehicle ever exist

Unfortunately, plugging into a domestic 110VAC outlet for 3 hours is barely worth the effort. You'll get maybe 5kWh of charge, which in a truck towing a big trailer might get you as little as an extra 10 miles of range.
by Punx0r
Feb 27 2020 4:08am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 39
Views: 6289

Re: 1988 Honda Prelude conversion - fastest build log ever.

1260 kg all up, which is about 160 kg more than original. Still getting ~150 km range on the freeway, but I need to do another long drive on a cooler day to see what it comes to. Sounds good to me! Range is comparable with an original Leaf (if not better) but over 250kg lighter. There's too many bi...
by Punx0r
Feb 27 2020 3:58am
Forum: E-Bike Technical
Topic: How to disassemble motor adapter from sprocket/freewheel?
Replies: 21
Views: 2037

Re: How to disassemble motor adapter from sprocket/freewheel?

Oh, I thought you wanted to keep/reuse the adapter! :lol:

If something is too hard to drill (assuming a good quality drill bit) often you can just heat it up to a red heat, let it cool off slowly and it will soften it enough to drill.
by Punx0r
Feb 24 2020 8:47am
Forum: E-Bike Technical
Topic: How to disassemble motor adapter from sprocket/freewheel?
Replies: 21
Views: 2037

Re: How to disassemble motor adapter from sprocket/freewheel?

OK, here is what I would do if you have no welder and how have the drilled holes: Get a small offcut of steel plate 6,8,10,12mm thick Drill a 1/2" hole in the centre and file square to take a socket wrench drive Drill and tap two threads corresponding to the drilled holes in your adapter Tighten dow...
by Punx0r
Feb 24 2020 3:54am
Forum: E-Bike Technical
Topic: How to disassemble motor adapter from sprocket/freewheel?
Replies: 21
Views: 2037

Re: How to disassemble motor adapter from sprocket/freewheel?

I guess the dynamic torque from your drive motor is doing it up very tight.

Now you have two opposing slots can cut in the face, can you weld a large nut to a piece of flat steel inserted into both slots and use an impact wrench?
by Punx0r
Feb 21 2020 1:59pm
Forum: General Discussion
Topic: What's with this censoring nonsense happening on the forum?
Replies: 151
Views: 14777

Re: What's with this censoring nonsense happening on the forum?

It does demonstrate his tenuous grip on reality and paranoid tendencies.
by Punx0r
Feb 21 2020 5:56am
Forum: General Discussion
Topic: What's with this censoring nonsense happening on the forum?
Replies: 151
Views: 14777

Re: What's with this censoring nonsense happening on the forum?

It's funny to see his ego is such that he can't resist continuing his old rants under the guise of his new account while also claiming to have no idea who ET is/was :lol:
by Punx0r
Feb 20 2020 1:54pm
Forum: Battery Technology
Topic: Common pack design mistakes, how to avoid?
Replies: 322
Views: 59013

Re: Common pack design mistakes, how to avoid?

The advantage of buying little used automotive cells is you're taking advantage of the "bathtub" shaped failure curve of many products. You're eliminating the crib death part.
by Punx0r
Feb 20 2020 1:33pm
Forum: EV Business World
Topic: GM retreating into its shell ?
Replies: 36
Views: 2744

Re: GM retreating into its shell ?

https://en.m.wikipedia.org/wiki/List_of ... and_losses

GM have three places in the top 11 of largest annual losses of all time. Tens of billions! :o
by Punx0r
Feb 20 2020 3:51am
Forum: Electric Watercraft
Topic: Electric 22 feet speedboat from 1957
Replies: 21
Views: 1536

Re: Electric 22 feet speedboat from 1957

The Smart four-two EV battery might also be usable and might be more available in or around NL. I agree the price for used batteries needs to be sensible and shouldn't cost the same as new 18650 cells. Perhaps try German ebay?
by Punx0r
Feb 20 2020 3:41am
Forum: EV Business World
Topic: GM retreating into its shell ?
Replies: 36
Views: 2744

Re: GM retreating into its shell ?

Tesla? :whistle:
by Punx0r
Feb 19 2020 6:32am
Forum: Electric Watercraft
Topic: Electric 22 feet speedboat from 1957
Replies: 21
Views: 1536

Re: Electric 22 feet speedboat from 1957

You have some nice projects 8) A whole Leaf battery may be too large/heavy but it is made of many individual 60Ah modules. You can use as many as you like. There are similar sized cells available from other cars. Electric car cells tend to be large, capable of relatively high discharge and have long...
by Punx0r
Feb 18 2020 1:50pm
Forum: EV Business World
Topic: GM retreating into its shell ?
Replies: 36
Views: 2744

Re: GM retreating into its shell ?

Europe missed out on the Bolt because of GM pulling out of Opel/Vauxhall :(
by Punx0r
Feb 17 2020 4:49am
Forum: E-Vehicles General Discussion
Topic: BMW's All-Electric 40 Ton Truck Picks Off Low-Hanging Fruit
Replies: 21
Views: 2660

Re: BMW's All-Electric 40 Ton Truck Picks Off Low-Hanging Fr

I really do think a hybrid system to capture the wasted braking energy is very practical, though and should be fairly easy to implement considering they already have electric drive and regen braking. And lo, it did come to pass :lol: https://www.popularmechanics.com/technology/infrastructure/a30873...
by Punx0r
Feb 14 2020 5:28am
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 111
Views: 10101

Re: Motortrend article with tons of info about Tesla’s Cybertruck

Oh, I can read just fine thanks. I also do a reasonable job of comprehending your attempts at misinterpreting data, distorting fact and denial of reality*. What I struggle with is remembering where you've moved the goalposts to with each and every post :wink: *Your anti-science, pro-status quo attit...
by Punx0r
Feb 14 2020 3:07am
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 111
Views: 10101

Re: Motortrend article with tons of info about Tesla’s Cybertruck

Go on then, what is your "message" about the Cybertruck? Please enlighten us, oh great curmudgeonly ludite... :lol:
by Punx0r
Feb 13 2020 5:27pm
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 111
Views: 10101

Re: Motortrend article with tons of info about Tesla’s Cybertruck

I can't tell if you're deliberately dishonest or just delusional but either way you're full of it...
by Punx0r
Feb 13 2020 7:10am
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 111
Views: 10101

Re: Motortrend article with tons of info about Tesla’s Cybertruck

Hillhater wrote:
Feb 12 2020 7:53am
owners of 10 year old Leafs have problems finding even an official Nissan dealer that is qualified trained, and tooled up to deal with drive train issues. It a completely new skillset that does not exist in the established auto repair network.
Ahem.
by Punx0r
Feb 13 2020 4:28am
Forum: Motor Technology
Topic: what is cogging torque?
Replies: 47
Views: 4156

Re: what is cogging torque?

Regarding what magnets can and cannot do in general google "can magnets do work" and read around a bit. physics.stackexchange is usually pretty good for these sorts of questions. If you have the basics in mind it's less tempting to speculate on what they might be doing in a motor. Cogging is cogging...
by Punx0r
Feb 13 2020 3:35am
Forum: E-Bike Technical
Topic: Problem with phasewire heat shrink :(
Replies: 8
Views: 711

Re: Problem with phasewire heat shrink :(

I think that's silicone insulation. It's good for high temperatures but can be pretty fragile
by Punx0r
Feb 13 2020 3:31am
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 111
Views: 10101

Re: Motortrend article with tons of info about Tesla’s Cybertruck

Could you please stop flip-flopping between your argument being:

1) EVs are unreliable, regardless of support
2) There's no dealer support for EVs
3) There's dealer support but little independent garage support
by Punx0r
Feb 12 2020 5:58pm
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 111
Views: 10101

Re: Motortrend article with tons of info about Tesla’s Cybertruck

How many Leafs sold each yeah in Aus? Compared to how many Porsche Boxsters? How many generic Fords and Holdens?

I find myself saying this once again, but your local experience does not equal the World. There are places outside your borders and they are not necessarily the same! :shock: