Search found 254 matches

by flip_normal
Jun 16 2011 11:10pm
Forum: General Discussion
Topic: AGEING
Replies: 17
Views: 1770

Re: AGEING

Youth is wasted on the young, and retirement is wasted on the old. If you could live life backwards: You start out dead and get that out of the way. Then you wake up in an old age home feeling better every day. Then you get kicked out for being too healthy. Enjoy your retirement and collect your pe...
by flip_normal
Jun 16 2011 10:59pm
Forum: General Discussion
Topic: Hydrogen Explosion at Japanese Nuclear Plant!
Replies: 57
Views: 5747

Re: Hydrogen Explosion at Japanese Nuclear Plant!

...this is getting more tragic every moment. Not wishing to detract from the heroic efforts of the workers at the plant, but it seems more like a farce to me. Why did they have the backup generators in a place where they could be flooded? If there was more openness then surely someone could have po...
by flip_normal
Jun 14 2011 7:35pm
Forum: General Discussion
Topic: AGEING
Replies: 17
Views: 1770

Re: AGEING

by flip_normal
Jun 13 2011 12:06pm
Forum: General Discussion
Topic: The Most Prophetic warning of our time?
Replies: 43
Views: 2535

Re: The Most Prophetic warning of our time?

I love all the ranting and raving but lets face it what will happen will happen and that's about all we can expect. That's exactly the fatalistic feudal attitude which the Enlightenment fought to overcome by placing man at the centre of the world. Worryingly it's this misanthropic environmentalist/...
by flip_normal
May 31 2011 7:20pm
Forum: General Discussion
Topic: Needed...endless sphere trick questions for registration
Replies: 49
Views: 3014

Re: Needed...endless sphere trick questions for registration

Direct potential new members to a short essay on ebike/elecrtical basics. Then set a short comprehension test. Maybe 3 questions.
by flip_normal
Feb 24 2011 7:54pm
Forum: General Discussion
Topic: The futility of the Prius and the end of the world …
Replies: 47
Views: 3765

Re: The futility of the Prius and the end of the world …

the main problem with resource-pessimists such as Malthusians is that they continually misinterpret social limits as physical limits. They naturalise social limits, reinterpreting and re-presenting problems of social development as problems of nature’s shrinking bounty. They make the fatal f...
by flip_normal
Feb 24 2011 7:04pm
Forum: General Discussion
Topic: The futility of the Prius and the end of the world …
Replies: 47
Views: 3765

Re: The futility of the Prius and the end of the world …

Think the Earth is finite? Think again the main problem with resource-pessimists such as Malthusians is that they continually misinterpret social limits as physical limits. They naturalise social limits, reinterpreting and re-presenting problems of social development as problems of nature’s ...
by flip_normal
Feb 16 2011 2:26am
Forum: Battery Technology
Topic: the importance of heating/cooling your batteries
Replies: 72
Views: 4350

Re: the importance of cooling your batteries

There was a video posted recently of a guy giving a lecture on lithium ion cell chemistry, can't find it atm. IIRC he said that 50degC was the temp at which the organic solvent in the cells starts to degrade. My headways get up to 35degC after a half hour run at 25degC ambient and I haven't noticed ...
by flip_normal
Feb 13 2011 1:34am
Forum: Battery Technology
Topic: 8 kWh Battery pack advice
Replies: 85
Views: 7487

Re: 8 kWh Battery pack advice

I'm not you sure you want to be sitting on top of 144 - 180V DC with the possibility of melting snow in the equation. This is one application where I'd want to keep the system voltage at ~50V max and gear to that.
by flip_normal
Feb 12 2011 10:39pm
Forum: E-Bike Technical
Topic: Currie / Tongxin Geared Hub repair
Replies: 23
Views: 5838

Re: Currie / Tongxin Geared Hub repair

There may be some useful info in this thread about a similar toothless planetary gear hub motor called a TARN.
by flip_normal
Dec 16 2010 10:54pm
Forum: General Discussion
Topic: General Discussion "allowable" topics
Replies: 32
Views: 1877

Re: General Discussion "allowable" topics

EDIT: Refined proposal: 1. Rename 'The Cesspool' to 'Everything Else'. 2. Move 'General Discussion' into this section. 3. Rename 'Other Toxic Discussions' to 'Potentially Offensive Topics' and keep the caveat 'WARNING: This area may contain offensive posts or controversial topics.' 4. Make this a pu...
by flip_normal
Dec 16 2010 9:26pm
Forum: General Discussion
Topic: General Discussion "allowable" topics
Replies: 32
Views: 1877

Re: General Discussion "allowable" topics

I voted other. The problem is partly one of structure. Placing 'General Discussion' near the top of the forum list gives it too much prominence. I enjoy reading off topic (ie. non EV) stuff and agree that it helps build the community. I can fully understand Bob taking offence to his thread being mov...
by flip_normal
Nov 13 2010 8:58pm
Forum: General Discussion
Topic: Have you heard this...it's really old
Replies: 8
Views: 760

Re: Have you heard this...it's really old

There was a young woman from Bude,
Who went for a swim in the lake,
When a man in a punt,
Put his pole in her ear,
And said: "Oi, you can't swim 'ere, it's private!"
by flip_normal
Oct 20 2010 3:01pm
Forum: Battery Technology
Topic: Can I solder directly to Headway 38120 cells?
Replies: 26
Views: 3141

Re: Can I solder directly to Headway 38120 cells?

I soldered directly onto Headway 38120L cells to make four 5p4s packs each of which is the same size as a single 38AH Greesaver SLA batt. I couldn't use the screw terminal 'S' cells because the batt boxes in my moped weren't big enough. I've got over 1500km on my cells and they show no sign of degra...
by flip_normal
Sep 27 2010 3:10pm
Forum: General Discussion
Topic: TOOLS FOR BIKE BUILDERS
Replies: 126
Views: 21414

Re: TOOLS FOR BIKE BUILDERS

Excellent work valy, keep posting please. I'd like to see if you can get better results with the bender with thicker walled pipe, if/when you get round to it.

Do you have any details about that pump, where to buy, seems to have a decent flow rate and draws well from a shallow reservoir.

Cheers.
by flip_normal
Sep 26 2010 2:06pm
Forum: General Discussion
Topic: Working in a robotics lab
Replies: 5
Views: 780

Re: Working in a robotics lab

Lol "Screw-ah-you danieru-san...beginna luck" That high-speed robot is pretty frickin incredible...to think that it caught that cell phone on its edges is just baffling! One addendum to the "cost of objects," and that is cost is not only a reflection of the labor behind them...it's also a reflectio...
by flip_normal
Sep 24 2010 9:24pm
Forum: General Discussion
Topic: Working in a robotics lab
Replies: 5
Views: 780

Re: Working in a robotics lab

Congrats on your new post, glad to see someone working on replicating the action of tendons. This is my favourite bit of robotics kit. -KxjVlaLBmk Fully automated CF layup anyone? Mclaren F1s for everyone? Shouldn't be too long before the manufacture of anything is affordable, if the cost of a thing...
by flip_normal
Sep 19 2010 10:05am
Forum: Battery Technology
Topic: How would you evaluate these batteries?
Replies: 10
Views: 791

Re: How would you evaluate these batteries?

pengyou wrote:For a 1,500 watt 48v motor, what c rate would I need?
At least 3C for a 20Ah pack should give decent cycle life, assuming you have a good BMS.
by flip_normal
Sep 19 2010 2:17am
Forum: Battery Technology
Topic: No luck soldering aluminum cell tabs. What am I doing wrong?
Replies: 19
Views: 3080

Re: No luck soldering aluminum cell tabs. What am I doing wr

I'd forget about soldering the tabs and buy some clips like these . u clips.jpg Fold the tabs together and slip some clips over them. Cover in kapton tape. Job done. :D EDIT: Balance wires can be soldered to a thin strip of copper which the tabs are then folded on to. It maybe a good idea to put the...
by flip_normal
Sep 18 2010 4:38am
Forum: Battery Technology
Topic: How would you evaluate these batteries?
Replies: 10
Views: 791

Re: How would you evaluate these batteries?

Erm?....check the specs for real a123 26650 cells?...
by flip_normal
Aug 15 2010 4:18am
Forum: Battery Technology
Topic: Even Newer 4 to 24-cell Battery Management System (BMS)
Replies: 2168
Views: 238493

Re: Even Newer 4 to 24-cell Battery Management System (BMS)

And where does one buy connector parts? Tpacks? hobby-city (They have a lot of prepared JST-XH cables but I don't see pigtails, nor 9-way connectors). Digikey seem to have everything but that way I get to do a lot of dull crimping without the right crimp tool. Any clarifications would be most welco...
by flip_normal
Aug 15 2010 4:14am
Forum: Resources & EV Related Parts and Services
Topic: Throttles, connectors, accessories, - Where to buy them?
Replies: 26
Views: 18311

Re: Throttles, connectors, accessories, - Where to buy them?

JST-XH 8s (9 wire) connector cable/pigtail for Celllog from hobbydream and in their ebay shop.
by flip_normal
Jun 14 2010 7:52am
Forum: Battery Technology
Topic: Series Parallel with Cellog 8
Replies: 17
Views: 3326

Re: Series Parallel with Cellog 8

Cricklewood electronics have them in stock.
I got a couple last week.
by flip_normal
May 24 2010 9:30pm
Forum: Battery Technology
Topic: 9000 mAH NiMH "C" Cell? - WTF!
Replies: 11
Views: 1669

Re: 9000 mAH NiMH "C" Cell? - WTF!

No Real!
1500mah.jpg
1500mah.jpg (36.95 KiB) Viewed 420 times