Odds and ends

Mark · Post by **Mark** » Tue Dec 11, 2007 3:31 am

Another way out on a limb idea I had with springs was to try a Slinky jam jar. Cap the top and bottom and put a hole in the top lid. Just wanted to try it for the heck of it. Maybe a small slinky or section of slinky would suffice to jump up and down with the Reynst action. It would be fun to have Reynst powered slinky toy of some kind. Maybe a hole in both end caps and have the poof throw it over itself. ha
PS I am still dwelling on my expensive Klein bottle fiasco. Must think of a way to get it to run.
http://web.ics.purdue.edu/~braile/edumo ... age087.jpg
Here's some other slinky being used for unusual things too.
http://www.radiowymsey.org/FanDipole/slinky.htm
The old slinky song/commercial I remember as a kid .
http://youtube.com/watch?v=EZL6RGkPjws
This was rather odd to run across on my slinky search. Just this morning it didn't have any adult tag on it. Guess they decided to change the rating. Don't hold me responsible for your shock or dismay. View at your own risk! What a world. ha
http://youtube.com/watch?v=9LKcb-NNA4g

History
"In 1943, Richard James, and his assistant Coleman Barber, a US marine engineer stationed at the Cramp shipyards in Philadelphia, observed a torsion spring fall off a table and roll around on the deck (a torsion spring has no compression or tension). He told his wife: "I think there could be a toy in this."
http://en.wikipedia.org/wiki/Slinky
This was entertaining too.
http://web.mit.edu/Invent/iow/slinky.html

larry cottrill · Post by **larry cottrill** » Tue Dec 11, 2007 2:11 pm

Man, I wish I had one of those high school Physics lab slinkys - fully compressed (i.e. 'at rest') they were a couple of feet high, and you could stretch them clear across the room without over-stressing them. Then, you could play with wave motions (assuming you have a smooth, hard floor). They will handle both transverse and compression waves nicely. You can demonstrate both positive wave reflection (by locking the far end to something) and negative reflection (by leaving the far end free to flail about). This will work with both types of waves. You can even send 'square waves' to simulate digital pulses. Amazing demonstration instrument, so simple and effective.

L Cottrill

Post by **Mike Everman** » Tue Dec 11, 2007 3:02 pm

Mark wrote: PS I am still dwelling on my expensive Klein bottle fiasco. Must think of a way to get it to run.

That is the funniest thing I've heard for a while! ha ha

Mark · Post by **Mark** » Tue Dec 11, 2007 4:31 pm

I was thinking about seeing shellacked porcupine fish/blowfish in some tourist shop or marine institute in the past around here and although I couldn't recommend buying one, the shape would make for an interesting art piece as a jam jar I think. Others have had vaguely similar ideas I see. I saw a hot air balloon blowfish idea too, so maybe a jam jar blowfish powered balloon would be nice too.
I've got it pretty bad, for who in their right mind sees a jam jar when looking at a porcupine fish???
http://carboncopy.hobix.com/archives/blowfish.jpg
http://www.namedevelopment.com/blog/arc ... helter.jpg
http://www.totalitea.com/images/accesso ... h-blue.jpg
http://www.beautifulprints.info/sealife/sealife16.jpg
http://www.manchestersculpture.com/files/blowpurp.jpg
http://ecx.images-amazon.com/images/I/4 ... AA280_.jpg

Helmholtz resonators of a sort. ha
http://tinyurl.com/yup6tz

Mark · Post by **Mark** » Tue Dec 11, 2007 5:42 pm

Mike Everman wrote:
Mark wrote: PS I am still dwelling on my expensive Klein bottle fiasco. Must think of a way to get it to run.
That is the funniest thing I've heard for a while! ha ha

I would have had a better shot with the straight through with side loop. (Scroll down on link)
http://www.kleinbottle.com/custom_klein_bottles.htm

I noticed they have plenty of Klein bottle shapes, but no perfectly u-bent but "straight" Klein tubes. I'd draw you one, but you can probably picture it. ha
I wonder if "straight tubes" would somehow destroy the mobius mystique? I say who says you need a bulbous part or that it has to be a bottle? I wonder if a "Klein tube" could be made to run? (I haven't thought any of this twisted stuff out).

"In this all-too-asymetrical universe, Acme's technicians strive to preserve parity. By slicing an Acme Klein Bottle, they generate one left handed Möbius loop and a matching right-handed one. Unlike matter/antimatter couplets, these can be placed next to each other without fear of total annihilation."
http://www.kleinbottle.com/sliced_klein_bottles.htm

pezman · Post by **pezman** » Tue Dec 11, 2007 10:10 pm

What if you took a long-neck squash, cut a hole in it and then threaded the stem through and coaxed it into growing into a klein-ish gourd ... per the attached, very-bad picture.

Mark · Post by **Mark** » Wed Dec 12, 2007 3:21 am

That's a good idea with the Klein gourd. I'm sure the topologists and artists would appreciate such an organic form. It certainly seems plausible to grow/train one into the Klein shape.
Here's a few nice snorkelers.
http://www.ehow.com/images/GlobalPhoto/ ... 2_Full.jpg
http://www.grandgourds.com/index.html
http://www.freewebs.com/okieyard/dipper%20gourds.jpg
http://tinyurl.com/33f7kt
http://ecx.images-amazon.com/images/I/5 ... AA280_.jpg
http://www.hollarseeds.com/Gourds/DipperLH-small.jpg
http://www.seedsbydesign.com/prodpict/635.jpg

pezman · Post by **pezman** » Wed Dec 12, 2007 5:10 pm

Dang, it seems that this may have already been done ...

http://www.flickr.com/photos/steve_schm ... 662319474/

In fact, squash training seems to be quite the niche hobby ...

It also seems that there is no shortage of folks in-klein-ed to tinker with topological oddities ...

http://www.flickr.com/photos/tags/kleinbottle/

Mark · Post by **Mark** » Wed Dec 12, 2007 5:32 pm

Good find there Pezman. I did run across a few of those gooseneck gourds, they reminded me of those old alchemy flasks too.
http://gcrec.ifas.ufl.edu/gourd%20webpa ... k_swan.htm

Flickr sure had some nice glass Klein creations, I'll have to look them over again after work. There must be a jam jar in there somewhere. ha

Irvine.J · Post by **Irvine.J** » Thu Dec 13, 2007 12:34 am

http://cgi.ebay.com.au/Outdoor-Stainles ... dZViewItem
Cut off the bottom and flare it, and bobs ya valve head, or even CC.

Mark · Post by **Mark** » Wed Dec 19, 2007 2:34 am

I was just reading about this engine in the latest Popular Science magazine. It said this company, I think BMW or Mercedes-Benz, don't quote me, has one now that switches over from spark ignition to HCCI when the car is at a low load such as cruising speed, it can drink more air then too with HCCI or really lean out if you rather. The engine is also a hybrid and gets around 42-44 mpg I think the article said. Not all that great but perhaps with the right fuel and technology, the concept could become commonplace.
http://www.worldcarfans.com/9070827.006 ... technology
http://www.physorg.com/printnews.php?newsid=104432768
http://quasiturbine.promci.qc.ca/QTPhotodetonation.html
http://findarticles.com/p/articles/mi_m ... i_n8640951
http://en.wikipedia.org/wiki/HCCI

PyroJoe · Post by **PyroJoe** » Wed Dec 19, 2007 9:20 pm

Would like to view the engine:

http://en.wikipedia.org/wiki/Microjoule

Mark · Post by **Mark** » Thu Dec 20, 2007 2:38 am

http://intl.emboj.org/news/2007/071217/ ... 1138b.html

Mark · Post by **Mark** » Thu Dec 20, 2007 3:39 am

"Would like to view the engine"

Here's the engine for one that gets 3,145 mpg. Not nearly as good as the French team, but still better than most mopeds. ha
It uses a 4 stroke Briggs and Stratton 3.5 hp. @3600 rpm (see second link) I think, very tired tonight after work.

Some odds and ends. Just trying to hunt the French "secret" engine down. Looks like it is just as much the car design if not more than the engine. Maybe they turn the engine on and off and coast some? I don't know if they have to maintain a certain speed/rules with the French deal, I suppose drag would be a big factor. Haven't really read enough to post my fragments of information.

"First about the car that does 6786 miles per gallon (oh yeah !!). This record was set by the “Microjoule”, an ethanol-powered car for the 2006 Shell eco-marathon."
"…A team of Canadian engineering students won the annual Supermileage race in Michigan with its 80-lb. carbon-fiber Mark V, which can travel 3,145 miles on a single gallon of gas. That’s thanks to details like a curved underbody, an ultra-fuel-efficient 54-cc engine and a driver who understands why the turtle beat the hare. The catch? You have to drive lying down, and the windows don’t open."
http://www.thetaoofmakingmoney.com/2006/12/10/145.html
http://www.sae.org/students/superrules.pdf
http://www.jackssmallengines.com/bseng.cfm

Mark · Post by **Mark** » Thu Dec 20, 2007 3:59 am

Points to ponder here. I think today I was reading in the latest Pop Mechanics or Science that there is a 74 mpg 3 cylinder clean turbo diesel coming to the US in 2008 I think. Don't quote me though.
All I could find was this old news.

"I’m glad VW is going to have a clean-diesel Jetta in 2008. But I won’t buy one. For me, the numbers just don’t work: It’s a $25,000 car that gets 45 mpg. I can buy a Toyota Corolla for $10,000 less and still get 38 mpg—a price difference that would take the Jetta 66 years to overcome, assuming $3 gas/diesel. That’s not to say the Jetta isn’t a great car, and I would much rather drive it than a Corolla. But it just doesn’t make economic sense, and as a writer pulling down a modest income, it’s all about economics."

"59. RE: Volkswagen’s Clean-Diesel, 70-mpg Polo May Head Stateside: Test Drive
Hey Volkswagon...give my dad and I 74 mile to the gallon car and you have two sales. Give me a 94 mile to the gallon car and Its mine. Dont underestimate how many people are fed up with the politics and sending our money to the middle east and the big corporations. sincerely, Brian Hunt"

http://www.popularmechanics.com/blogs/a ... 19904.html

www.pulse-jets.com

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Klein gourd

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Möbius Dictus!

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bobs ya valve head.

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