Search found 4737 matches

by Punx0r
Oct 15 2019 3:06am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

So, are you saying there have been , and are, NO trends ? At various periods there have have been cooling trends, ( 1940 - 1975) and other periods warming trends (1980-2000), ? The whole AGW debate is based on a trend .! Maybe you missed the facts stated by those eminent , qualified scientists, ......
by Punx0r
Oct 14 2019 2:12am
Forum: Battery Technology
Topic: Big lead acid single cell capacities
Replies: 9
Views: 615

Re: Big lead acid single cell capacities

:thumb:

Nice to see something well made with a long useful service life
by Punx0r
Oct 13 2019 12:42pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I think solar thermal made more sense in the earlier times when many of the projects were started - before the precipitous drop in the cost of PV and batteries
by Punx0r
Oct 13 2019 5:21am
Forum: E-Vehicles General Discussion
Topic: Can EVs survive without subsidies ?
Replies: 11
Views: 218

Re: Can EVs survive without subsidies ?

How much of a direct cash bailout did the big U.S. car companies get from the American government a few years ago to stop them going bust?
by Punx0r
Oct 10 2019 9:49am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

You seem to be confusing this casual public forum with some academic science institute with formal rules and traditions ? And since much of “science and academia” seems to have stuck its head up its own arse over AGW, i would not pay it much reverence anyway. It does not matter where the words or t...
by Punx0r
Oct 10 2019 7:52am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Because in science and academia it is customary (and expected) to provide sources for any material you quote. You linked to a paper and provided a quote, implying it was quote from the paper, when it fact it wasn't. This is at least sloppy, if not intentional missleading. I note you still haven't gi...
by Punx0r
Oct 10 2019 2:52am
Forum: Motor Technology
Topic: is this post correct?
Replies: 5
Views: 157

Re: is this post correct?

For those who know nothing of how electric motors and vehicles are rated, the Wattage IS NOT the power output but the peak load power consumption. Industrial electric motors are rated by power output not input. Hobbyist/RC motors might be rated by input power because it's a bigger number and also o...
by Punx0r
Oct 10 2019 2:40am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I read the whole paper ..and other review papers, ...and agree with the conclusion.. “The authors stress that the resulting errors are in the order of magnitude of the greenhouse gas forcing. Thus the solar irradiation and the aerosol forcing are falsified.” Can you understand the implications of t...
by Punx0r
Oct 09 2019 3:25am
Forum: E-Bike Technical
Topic: Help ID compounds on Strain Gauge in hub motor? - photo
Replies: 8
Views: 177

Re: Help ID compounds on Strain Gauge in hub motor? - photo

That would probably work. The normal reason for gooping RTV onto gauges is to provide strain relief for the lead wires and seal the gauge from moisture. The Bionix system seems to be doing that with the epoxy and the clear silicone, so what function the white stuff is fulfilling I'm not sure. Someon...
by Punx0r
Oct 09 2019 3:21am
Forum: Motor Technology
Topic: DIY Motor Dyno/load?
Replies: 17
Views: 368

Re: DIY Motor Dyno/load?

Exactly. Not a great idea... An automotive disc brake is pretty compact and simple and can dissipate a fair amount (few kW) continuously but may not be that linear due to CoF changing with temperature. Another alternative is driving a hydraulic pump through a restriction and an oil cooler. Non-linea...
by Punx0r
Oct 08 2019 3:03am
Forum: E-Bike Technical
Topic: Help ID compounds on Strain Gauge in hub motor? - photo
Replies: 8
Views: 177

Re: Help ID compounds on Strain Gauge in hub motor? - photo

neutral cure silicone RTV is often used for covering strain gauges but your stuff sounds like something a little different, like AW says.
by Punx0r
Oct 08 2019 2:49am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Germany did not produce those 7GW per year of new wind and solar capacity all by itself for those few years that it was at that level. Germany will produce around 6.9million cars in 2019 with an embodied energy of around 20,000kWh each. That's 138 TWh. We have plenty of capacity to build clean gene...
by Punx0r
Oct 05 2019 4:56pm
Forum: General Discussion
Topic: Active energy transfer balancing
Replies: 14
Views: 842

Re: Active energy transfer balancing

Yep, typo, was suposed to say "no LVC". That's a bit of a shame as it does mean it's fully capable of killing your battery rather than protecting it. DIP switches to select LVC in 0.5V increments would be a good addition. It's great to finally see active balancing hitting the hobbyist end of the mar...
by Punx0r
Oct 05 2019 4:46am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

We'll see if Hinckley C goes ahead - it's hugely expensive and keeps threatening to bankrupt EDF, the giant French energy company, who are supposed to be building it.
by Punx0r
Oct 05 2019 4:35am
Forum: General Discussion
Topic: Active energy transfer balancing
Replies: 14
Views: 842

Re: Active energy transfer balancing

If they are chemistry agnostic does that mean there is now LVC?
by Punx0r
Oct 05 2019 4:31am
Forum: General Discussion
Topic: White putty used in battery packs?
Replies: 11
Views: 297

Re: White putty used in battery packs?

Beware that electronics grade silicone is not the same as bathroom silicone, which evolves acetic acid as it cures (acetoxy) which corrodes metal. Instead it is a more expensive form that evolves only alcohol as it cures (alkoxy). It's also usually low rather than high modulous, which makes it more ...
by Punx0r
Oct 04 2019 2:12am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Hillhater wrote:
Oct 03 2019 8:36pm
You may want to Check up a little about modeling random chaotic systems ..!
Poor Hillhater. Like so many climate deniers confusing climate and weather.
by Punx0r
Sep 26 2019 2:36am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

She is an autistic child with learning difficulties who is speaking her mind, and is being crucified by small-minded conservatives who are terrified that her message will resonate. but ..she is a child with learning difficulties , so where did all that fluff in her mind come from ?.. someone put it...
by Punx0r
Sep 25 2019 2:42pm
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 31
Views: 881

Re: Taycan video with some useful information

Not sure on the provenance of this figure, but 800V system is supposed to save 4kg https://www.caradvice.com.au/789624/porsche-taycan-battery/ I'm not sure if this factors in the 50kW 400-800v dc-dc converter required to allow the car to charge from a standard 400V charger or it's just the differenc...
by Punx0r
Sep 24 2019 4:44am
Forum: Large EV General Discussion
Topic: Isuzu trooper
Replies: 4
Views: 278

Re: Isuzu trooper

If the main rationale for conversion is because the head gasket is blown and it's not worth the time/money/effort to fix it then absolutely not! An EV conversion would be a LOT more work and expense.
by Punx0r
Sep 22 2019 12:01pm
Forum: E-Bike Technical
Topic: Rim width question for high power EEB
Replies: 1
Views: 105

Re: Rim width question for high power EEB

I don't think there's anything to be concerned about with having a wider tyre on the rear if that's what you're asking? I never noticed any drawbacks
by Punx0r
Sep 20 2019 2:45am
Forum: E-Vehicles General Discussion
Topic: KTM giving up on gas
Replies: 14
Views: 1669

Re: KTM giving up on gas

Photo is of an ICE bike?! :lol:
by Punx0r
Sep 19 2019 2:48am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1625
Views: 192626

Re: Thread for new battery breakthrough PR releases

No one is saying they sacrificed half the energy density or half the calender life in order to not self-discharge in 1 year - that is a strawman argument. Those are not mutually exclusive features like energy density and power density are. If a good cell also has a low self-discharge then that's a g...
by Punx0r
Sep 18 2019 7:32am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5272
Views: 210104

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I've been told (third hand from somone in the industry so not verified) that during cold winter periods the French government pays businesses that own backup generators to disconnect from the grid and run on diesel to aid grid stability. Along with utilising internectors from your neighbours it's a ...
by Punx0r
Sep 18 2019 4:35am
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 31
Views: 881

Re: Taycan video with some useful information

This is one of the most impressive things: https://www.motor1.com/news/366038/porsche-taycan-nardo-endurance-run/ 24 hour endurance run, 2100miles covered at an average speed of ~89mph. That's driving at between 121-134mph and stopping to recharge when needed. The range and charge time used for the ...