Search found 10055 matches

by spinningmagnets
Jun 15 2009 10:37pm
Forum: General Discussion
Topic: Solar power coming to my house.
Replies: 23
Views: 1482

Re: Solar power coming to my house.

This small central tower system in Israel is interesting. Its much smaller, but its only to power the local town. It doesn't feature salt-heat storage, but if solar heat starts to drop off, a multi-fuel back-up generator kicks on. Its a Capstone turbine (similar to small jet made from a turbocharger...
by spinningmagnets
Jun 15 2009 9:59pm
Forum: General Discussion
Topic: Solar power coming to my house.
Replies: 23
Views: 1482

Re: Solar power coming to my house.

I think all the old-style nuke plants are being phased out. There is an argument for building some of the new-style (Thorium fuel cant be weaponized into plutonium, low-pressure Helium as the heat-transfer medium is inherently safer than pressurised water, pebble-bed configuration has "walk away" co...
by spinningmagnets
Jun 15 2009 1:35pm
Forum: E-Bike Technical
Topic: USN Technical Manual - Electric Motors and Controllers
Replies: 2
Views: 306

Re: USN Technical Manual - Electric Motors and Controllers

"...Well, putting it on the web should prevent all violations. Who'd look there?..."

YES ! I'd feel very betrayed if somehow this 1999 DC motor and controller information found its way into the hands of the Chinese ! who knows WHAT would happen then !?? (PS, I am an ex-Bubblehead/Squid, MM3SS)
by spinningmagnets
Jun 15 2009 1:23pm
Forum: E-Bike General Discussion
Topic: My Ebike got stolen today.
Replies: 42
Views: 2060

Re: My Ebike got stolen today.

Concerning scribing a number onto an expensive device that is a potential thief target (LCD TV, E-bike, laptop, etc) I have been recommended to use a state name and drivers license number that is in a relatively hidden location. Even if you move to another state, if you have a current license number...
by spinningmagnets
Jun 15 2009 1:09pm
Forum: General Discussion
Topic: How NOT to lock your bike up *pic*
Replies: 7
Views: 997

Re: How NOT to lock your bike up *pic*

My grandfather had an old single-seat police Harley stolen from his back yard when he was at church. He had bought it used at an auction, and had never gotten it running, but it was valuable nevertheless. Questioning neighbors, two guys dragged it out of the back yard and and lifted it one axle at a...
by spinningmagnets
Jun 15 2009 10:06am
Forum: E-Bike General Discussion
Topic: My Ebike got stolen today.
Replies: 42
Views: 2060

Re: My Ebike got stolen today.

Dear set, I had a car stolen in broad daylight when I went into a Home Depot for 15 Minutes to see if a certain door was in-stock. It was used in a crime and then discarded, when I went to pull personal items from the holding yard, I saw how he did it. Door had been locked (slim-Jim?), top half of t...
by spinningmagnets
Jun 14 2009 7:28pm
Forum: General Discussion
Topic: Solar power coming to my house.
Replies: 23
Views: 1482

Re: Solar power coming to my house.

Some of the early solar plants that were made without any heat storage had adjascent natural-gas turbines (Jet engines), because they could be quickly brought on-line when a sudden cloudbank dropped off the solar heat that boiled the water for the steam-turbines. By using the solar heat to warm a ta...
by spinningmagnets
Jun 13 2009 8:51pm
Forum: General Discussion
Topic: Re: Real Estate:
Replies: 13
Views: 949

Re: Real Estate:

nutsandvolts, pull up a chair friend. "...it hasn't been seen all our lives..." I am 49 yrs old, and I have seen it 3 times in my life. But besides that, even if someone had never seen it anywhere, the 2003 boom related to low-6% interest (good) and creative financing (interest-only loans, adjustabl...
by spinningmagnets
Jun 13 2009 1:51pm
Forum: E-Bike Technical
Topic: DIY custom frames, home carbon-fiber method simplified
Replies: 62
Views: 29272

Re: Custom frames, home carbon-fiber method simplified

Please add any links with pics that display the techniques that are being posted ! I am not experienced with any of these methods, but I am persuaded that vacuum bagging and spray-on fibers are mass-production techniques. If I only need to make one frame, and I can spend a dozen Saturdays making it,...
by spinningmagnets
Jun 13 2009 1:28pm
Forum: E-Bike General Discussion
Topic: Single Sided Hubs and Hubmotors
Replies: 8
Views: 531

Re: Single Sided Hubs and Hubmotors

I never really thought much about those single-sided swing arms before, but the more I look at them...

Image
by spinningmagnets
Jun 13 2009 1:17pm
Forum: General Discussion
Topic: Need Opinions on Propane Powered Grumman Step Van
Replies: 17
Views: 1522

Re: Need Opinions on Propane Powered Grumman Step Van

If you think you'll end up living in a van (don't laugh) a tall van like the Grumman would be so much nicer than a car/short-van. Stretch out to sleep, and stand up to change clothes. If you think you'll have a small economy car as a second vehicle, I'd advise you to get a manual transmission. They ...
by spinningmagnets
Jun 13 2009 1:00pm
Forum: General Discussion
Topic: Re: Real Estate:
Replies: 13
Views: 949

Re: Real Estate:

I'll bet the link has a virus, spyware, trojan horse, e-mail address sponge for a spammer...And if you disagree with me, I'll prove it. Just send me your name, address, social security number, User-names, passwords, and bank account numbers. This will be fun, I have a comprehensive anti-virus progra...
by spinningmagnets
Jun 13 2009 12:53pm
Forum: General Discussion
Topic: Solar power coming to my house.
Replies: 23
Views: 1482

Re: Solar power coming to my house.

The fed sposored the development of the SEGS plants in the Southern California Mojave desert. They learned something from each one, and each successive plant was larger and more complex. There were two initial problems, one being when a cloud bank passed over for an hour, and also peak demand was in...
by spinningmagnets
Jun 13 2009 10:48am
Forum: E-Bike General Discussion
Topic: Single Sided Hubs and Hubmotors
Replies: 8
Views: 531

Re: Single Sided Hubs and Hubmotors

Single-sided...you mean, like this?
by spinningmagnets
Jun 12 2009 11:36pm
Forum: General Discussion
Topic: Need Opinions on Propane Powered Grumman Step Van
Replies: 17
Views: 1522

Re: Need Opinions on Propane Powered Grumman Step Van

If you get a VW diesel (Jetta/Golf) change the timing belt soon, even sooner than the manual suggests. Make sure to use a quality belt. Half the engines on the road are non-interference fit, and a broken belt leads to a couple valves stuck open as the crank spins a couple times before stopping, but ...
by spinningmagnets
Jun 12 2009 10:21pm
Forum: E-Bike General Discussion
Topic: Practical gearing limits of derailleurs
Replies: 23
Views: 1435

Re: Practical gearing limits of derailleurs

The Schwinn Paramount Chainring

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by spinningmagnets
Jun 12 2009 9:40pm
Forum: E-Bike General Discussion
Topic: Oddest / strangest thing you transported on a bike?
Replies: 57
Views: 3645

Re: Oddest / strangest thing you transported on a bike?

A Fed-Ex shipment from the Golden-Motor factory:

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And then gas prices spiked up...

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by spinningmagnets
Jun 12 2009 9:31pm
Forum: E-Vehicles General Discussion
Topic: Manual Of Bicycle Repair
Replies: 4
Views: 1693

Re: Manual Of Bicycle Repair

Here's another from a while back, good to have both links in one thread...

http://endless-sphere.com/forums/viewto ... =2&t=10690

http://endless-sphere.com/forums/viewto ... =7&t=10932

Plus, a video tutorial with a talking bike mechanic!

http://bicycletutor.com/
by spinningmagnets
Jun 12 2009 9:22pm
Forum: General Discussion
Topic: China: E-Bike leaders
Replies: 13
Views: 1284

Re: China: E-Bike leaders

I think another major factor that is seldom mentioned, is that with an expensive car being so far outside the average Chinese consumers price range, most people live fairly close to their work. Its easy to find bicycle articles about what a huge percentage of the Chinese population already ride a pe...
by spinningmagnets
Jun 12 2009 2:33pm
Forum: E-Bike Technical
Topic: DIY custom frames, home carbon-fiber method simplified
Replies: 62
Views: 29272

Re: Custom frames, home carbon-fiber method simplified

Thanks for all the great responses ! I am constantly AMAZED at the breadth and depth of experience of the members here ! The baby-boom bulge in the population demographic (born 1946-64) means there is a significant portion of the population that forms the "pig-inside-the-python" bell-curve of old fo...
by spinningmagnets
Jun 11 2009 12:56pm
Forum: E-Bike Non-hub Motor Drives
Topic: Drive Mounts and Irregular Tubing Shapes
Replies: 7
Views: 1061

Re: Drive Mounts and Irregular Tubing Shapes

I've also wondered about making a solid mount for oval tubing. If the oval cross-section is 2" X 3", rather than shop for a 4" X 5" cross-section aluminum block and then cutting it in half after shaping the oval hole, I'd get two 2" X 5" aluminum plates. I'd drill and bolt where the bolts will end u...
by spinningmagnets
Jun 11 2009 12:24pm
Forum: E-Bike Technical
Topic: DIY custom frames, home carbon-fiber method simplified
Replies: 62
Views: 29272

DIY custom frames, home carbon-fiber method simplified

I stumbled across this recently. This frame isn't my style, but the construction method is intriguing. You take a stiff foam urethane blank, then cut and shape it (easy) and insert metal hard-points for the BB, head-tube, etc...apply layers of CF cloth, sealing each with a vinyl-ester goop that does...
by spinningmagnets
Jun 11 2009 11:53am
Forum: General Discussion
Topic: Motor's power density
Replies: 19
Views: 1555

Re: Motor's power density

With ICE, fuel is cheap, and high-output/tiny-engine is expensive... With E-motors, lithium batteries are expensive, but an Astro at 72V/100A (7kW/9-HP?) is suprisingly affordable... "Affordable" compared to a custom-built tiny turbocharger with associated oil-pump, oil-cooler. Astro is now off-the-...
by spinningmagnets
Jun 10 2009 10:45am
Forum: E-Bike Non-hub Motor Drives
Topic: 2 Speed Planetary Shifter Idea
Replies: 18
Views: 2656

Re: 2 Speed Planetary Shifter Idea

I believe cargo trikes and E-motorcycles can really benefit from a simple strong reliable 2-speed tranny. For most e-bikes, I doubt it will be worth it with the way the RC drives are quickly developing. That being said, I think the centrifugal aspect of this is better operated from the output shaft,...
by spinningmagnets
Jun 09 2009 10:16pm
Forum: General Discussion
Topic: Motor's power density
Replies: 19
Views: 1555

Re: Motor's power density

I would say that if you are talking about common-construction engines and motors, the motors win by a large margin. Concerning range, gasoline/diesel are much more energy dense per volume than Lithium batteries. But as far as the engine...You can cram up to twice as much air/fuel than natuarally asp...