|
|
Thread Tools | Display Modes |
#51
|
|||
|
|||
need spring-energy-storage mechanism
Donald wrote:
wrote: A 2 pound flywheel can store 4 man-hours of energy at about 80% efficiency. This is a 5X better power to weight ratio than batteries. (still only a fraction of that of gasoline). Interesting calculation, where did you find it ? Where you someone buy a 2 pound flywheel ? donald A 2 pound flywheel at what RPM and what diameter? It also has to run on frictionless bearings and in a vacuum to actually store the energy. Science needs details. Bill Baka |
Ads |
#52
|
|||
|
|||
need spring-energy-storage mechanism
On Thu, 31 May 2007 16:54:55 GMT, Rich Grise wrote:
On Wed, 30 May 2007 17:47:25 -0400, default wrote: On Wed, 30 May 2007 20:49:02 GMT, Rich Grise wrote: I'd pay $100.00 to see somebody tape a piece of buttered toast to the back of a cat. ;-) I'd have no problem covering the #100 - it'd win $10,000 on "America's Stupidest Videos". ;-) You'd lose, on both counts. I'd anaesthetize the cat. I doubt if unconscious cats land on their feet; I bet this one didn't: http://www.youtube.com/watch?v=Gz-sC-vSIXk Cheers! Rich Wait a minute, you're changing the rules on me. You didn't say anything about the cat flying as well as being taped to toast. Parachute? Stabilizing fins? -- ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#53
|
|||
|
|||
need spring-energy-storage mechanism
|
#54
|
|||
|
|||
need spring-energy-storage mechanism
On 2007-05-30, me wrote:
Yes, there is more left out of this problem than left in. It is also possible (especially on a vertical drop system) to put several "buckets" on a rotating system and continually fill and empty them as the "go by". Basically a solid mass version of a "water wheel". Basically a bucket pump operating in reverse, it needs pulleys that can accomodate the buckets, but little else. Bye. Jasen |
#55
|
|||
|
|||
need spring-energy-storage mechanism
Dear default:
"default" wrote in message ... On Thu, 31 May 2007 16:54:55 GMT, Rich Grise wrote: On Wed, 30 May 2007 17:47:25 -0400, default wrote: On Wed, 30 May 2007 20:49:02 GMT, Rich Grise wrote: I'd pay $100.00 to see somebody tape a piece of buttered toast to the back of a cat. ;-) I'd have no problem covering the #100 - it'd win ? $10,000 on "America's Stupidest Videos". ;-) You'd lose, on both counts. I'd anaesthetize the cat. I doubt if unconscious cats land on their feet; I bet this one didn't: http://www.youtube.com/watch?v=Gz-sC-vSIXk Wait a minute, you're changing the rules on me. You didn't say anything about the cat flying as well as being taped to toast. Parachute? Stabilizing fins? Another branch of this thread... cat-a-pult. David A. Smith |
#56
|
|||
|
|||
need spring-energy-storage mechanism
On May 29, 5:53 am, wrote:
i think i need a spring energy-storage mechanism. Maybe a very large wind-up clock motor? the scenario is: a slightly-valuable commodity originates at the top of a mountain. More or less a bushel at a time. there is an existing paved road. the commodity fetches a price, but not enough to pay for very much transport. the concept is to use a cargo bicycle, maybe with trailer, to carry the items down to the bottom of the mountain, "winding up the clock" on the spring-storage. at the bottom, the load is transferred to buyers. the now very-much- lighter bicycle is to be driven UP the mountain, using the stored energy. Any cat which will catch the mice is fine with me. I'm just thinking that anything involving electricity, hydraulic fluids, etc, will be too involved, and losses throguh two conversions. Capacitor storage might be feasible, if there's high quality ones being sold. The charge doesn't need to held for long amounts of time. Down the hill, then back up. Ideally, this will be a ready-to-go or mostly ready-to-go commercial item. I am rather mechanically/electrically handy. But this is business, not pleasure. Time spent should be cost-effective. I've come to the conclusion the author of this post is just another of the internet trolls described in Wikipedia. One vaguely worded question asking about using a spring powered bicycle to transport a bushel of something of modest value from somewhere to somewhere. And no further response. |
#57
|
|||
|
|||
need spring-energy-storage mechanism
On Fri, 01 Jun 2007 06:19:31 -0700, "John S." wrote:
On May 29, 5:53 am, wrote: i think i need a spring energy-storage mechanism. Maybe a very large wind-up clock motor? .... I've come to the conclusion the author of this post is just another of the internet trolls described in Wikipedia. One vaguely worded question asking about using a spring powered bicycle to transport a bushel of something of modest value from somewhere to somewhere. And no further response. ] John is disturbed, because the poser of the question has not responded. This response in newsgroups is not in fact unusual. It reminds me that the US culture requires both a "Thank you" for help from the helpee, and a "You're welcome" from the helper, to be in good form. But it is probably better to act as though one responds to requests for input simply for one's own amusement or education. Brian Whatcott Altus OK |
#58
|
|||
|
|||
need spring-energy-storage mechanism
On Fri, 01 Jun 2007 06:19:31 -0700, "John S." wrote:
I've come to the conclusion the author of this post is just another of the internet trolls described in Wikipedia. One vaguely worded question asking about using a spring powered bicycle to transport a bushel of something of modest value from somewhere to somewhere. And no further response. He started a new thread saying we should forget about springs. And posted one reply on that thread. Half the folks that are posting through Google Groups don't understand how to interact with Usenet, indeed, don't seem to know that they are posting to Usenet or how to find their way back to what they posted. But he did cross post to groups associated with his basic premise, so he must have some understanding of Usenet. But yeah, I agree, too much troll here to be a serious question. Anyone that has ever tensioned a garage door spring, intended to assist lifting a weight of at most 50-100 pounds a few feet, and saw the spring that takes . . . wouldn't be seriously considering a spring - just too damn heavy and large to get its own weight up the hill. And the terms - only slightly valuable cargo, wouldn't demand a high tech solution like regenerative brake bicycles, vacuum flywheels, or springs that don't exist. He won't describe the cargo in more detail or the mountain? On the one hand he's saying its value hardly justifies the effort of moving it, on the other hand, it must be very valuable if he can even consider designing something that would be pushing the state of the art. (and wants the location to remain a secret) Contradictions. Troll bait. http://en.wikipedia.org/wiki/Troll_%28Internet%29 Trolling is a game about identity deception, albeit one that is played without the consent of most of the players. The troll attempts to pass as a legitimate participant, sharing the group's common interests and concerns; the newsgroups members, if they are cognizant of trolls and other identity deceptions, attempt to both distinguish real from trolling postings, and upon judging a poster a troll, make the offending poster leave the group. Their success at the former depends on how well they — and the troll — understand identity cues; their success at the latter depends on whether the troll's enjoyment is sufficiently diminished or outweighed by the costs imposed by the group. -- ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#59
|
|||
|
|||
need spring-energy-storage mechanism
On Fri, 01 Jun 2007 12:21:33 -0500, Brian Whatcott
wrote: It reminds me that the US culture requires both a "Thank you" for help from the helpee, and a "You're welcome" from the helper, to be in good form. So he's French? We North Americanos forget other cultures use the Internet. Of course if he's reading a discourse on his posting style, and is a troll, he's laughing his head off right now. -- ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#60
|
|||
|
|||
need spring-energy-storage mechanism
On Fri, 01 Jun 2007 07:01:03 -0400, default wrote:
On Thu, 31 May 2007 16:54:55 GMT, Rich Grise wrote: On Wed, 30 May 2007 17:47:25 -0400, default wrote: On Wed, 30 May 2007 20:49:02 GMT, Rich Grise wrote: I'd pay $100.00 to see somebody tape a piece of buttered toast to the back of a cat. ;-) I'd have no problem covering the #100 - it'd win $10,000 on "America's Stupidest Videos". ;-) You'd lose, on both counts. I'd anaesthetize the cat. I doubt if unconscious cats land on their feet; I bet this one didn't: http://www.youtube.com/watch?v=Gz-sC-vSIXk Wait a minute, you're changing the rules on me. You didn't say anything about the cat flying as well as being taped to toast. Parachute? Stabilizing fins? No, just the phenomena where cats always land on their feet and toast always lands butter-side down. Tape (or clamp, or whatever) the toast to the cat, and the assembly won't be able to land at all! ;-) Cheers! Rich |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Concussion mechanism, possibly relevant to helmets | Anthony Campbell | UK | 72 | January 19th 07 01:12 PM |
Helmet Straps: Some kind of release mechanism? | (PeteCresswell) | Mountain Biking | 4 | April 22nd 06 04:00 PM |
Ground Hugger steering mechanism | Min Kak | Recumbent Biking | 9 | October 20th 05 01:59 AM |
fatigued campy shifter mechanism | jim beam | Techniques | 20 | April 26th 05 01:55 PM |
Master Lock mechanism jammed | cam | UK | 17 | March 25th 04 10:20 AM |