Materials Science

Moderator: Mike Everman

pezman
Posts: 613
Joined: Fri Oct 08, 2004 4:13 am
Antipspambot question: 0
Location: USA

re: Materials Science

Post by pezman » Sat Feb 25, 2006 7:57 pm

Just had to toss this site in ...

Epieliptical rotary http://deadbeatdad.org/eliptoid/index.htm

Dang911
Posts: 395
Joined: Sat Jun 11, 2005 6:03 pm
Antipspambot question: 0
Location: USA-Florida, Georgia, Ohio
Contact:

re: Materials Science

Post by Dang911 » Sat Feb 25, 2006 8:16 pm

The video of the randcam looked less than promising....

The fact that he had to turn the engine with an electric motor, to get it to shoot a little fire, said there needs to be a lot more development.
Louder is ALWAYS Better!!!

pezman
Posts: 613
Joined: Fri Oct 08, 2004 4:13 am
Antipspambot question: 0
Location: USA

re: Materials Science

Post by pezman » Sat Feb 25, 2006 9:38 pm

Well, it looked like the diesel version. I'm not surprised that a rotary engine has problems generating adequate compression for dieseling.

Not endorsing any of the above ideas or claiming that they're ready for prime-time -- just putting them out there 'cause they seem cool.

It seems like you could adapt the Rand Cam idea to some sort of rotary valved PJ.

Dang911
Posts: 395
Joined: Sat Jun 11, 2005 6:03 pm
Antipspambot question: 0
Location: USA-Florida, Georgia, Ohio
Contact:

re: Materials Science

Post by Dang911 » Sat Feb 25, 2006 10:22 pm

I agree with you on the lack of compression, but if this is for fact, why call it a diesel, and not run it gasoline?

Those engines were all very cool BTW....
Louder is ALWAYS Better!!!

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Sun Feb 26, 2006 4:22 am

Just a tidbit on metal oxides on glass, it is curious how colors are formed. I remember being very interested in colored smoke and how that is done when I was in high school. And one favorite color was making clouds of iodine vapor with zinc dust, NH4NO3, and iodine crystals. It would transition from blue to violet as the cloud cooled. You just have to see it to really understand the beauty. I remember reading another way to make different colored smoke is to just control the temperature or perhaps particle size, which was interesting to me.

"What Is Dichroic Glass?"
"Dichroic Glass" is somewhat of a misnomer, since the dielectric coating that produces all the interesting colors is not glass at all, but a group of very thin layers of metal oxides. This stack of thin layers has a total thickness of three to five millionths of an inch. The layers produce an "interference filter", creating the varied and unique color characteristics we see. "
http://www.nfobase.com/html/dichroic_glass.html
http://cgi.ebay.com/EMERALD-GREEN-COLOR ... dZViewItem
Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Sun Mar 12, 2006 1:24 pm

Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Mon Apr 17, 2006 1:16 pm

The other day my brother was over constructing a 4 X 4 foot steel artificial reef, using my large drill press to drill holes in some angle iron. He uses expanded metal for the sides with large openings for fish to hide in. Anyway, I thought the way expanded metal is made was kind of nifty.
Mark
http://www.metlx.com/process.html
Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Thu Jun 08, 2006 3:23 am

Just a cute little PETE bottle. It would make for a fun gas/fuel tank. It's more eye catching in person than the scan I made of it. But certainly it is orbtasticly ornate, suitable for any small pulsejet enthusiast wanting that special fuel container. 11 fluid ounces or 325mL
Mark
Attachments
060607214452.jpg
(230.67 KiB) Downloaded 402 times
Last edited by Mark on Thu Jun 08, 2006 4:17 am, edited 1 time in total.
Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Thu Jun 08, 2006 4:17 am

11 ounces or 325 mL
Presentation is Everything

larry cottrill
Posts: 4140
Joined: Sun Oct 05, 2003 1:17 am
Antipspambot question: 0
Location: Mingo, Iowa USA
Contact:

re: Materials Science

Post by larry cottrill » Thu Jun 08, 2006 1:31 pm

Mark -

Where did you find that cutesy-pie bottle? What sort of beverage was in it?

It looks to me like something that would make an excellent mold for a nosecone shell - plaster it inside or out with epoxy, let cure, and peel away the bottle and discard. But, you're right - the bottle itself would make a neat streamlined fuel tank on a U-control speed model or something. Or, judiciously cut out part of the bottle to form a "bubble canopy" on a semi-scale jet fighter model of appropriate size.

L Cottrill

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Thu Jun 08, 2006 1:41 pm

Someone left it at the library.
Mark

"Ice Mountain brand is introducing stubby little sort-of-spherical -- let's say globular -- 11-ounce bottles that it's calling "Aquapods." They're aimed at kids, sort-of:

Nestlé publicity says "We designed the Aquapod bottle to make drinking water fun and exciting for kids, who love to sip from and show off the cool bubble-shaped bottle." The label on the bottle says "Orbtastic shape/ Charged with fun." Mr. Tidbit says "Harder to hold, even in a full-size hand."
Attachments
060608080755.jpg
(236.4 KiB) Downloaded 429 times
Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Thu Jun 08, 2006 1:50 pm

Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Thu Jun 08, 2006 3:11 pm

Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Fri Jun 16, 2006 4:10 pm

Presentation is Everything

Mark
Posts: 10802
Joined: Sat Oct 11, 2003 10:14 pm

re: Materials Science

Post by Mark » Sat Jul 01, 2006 12:12 am

http://tinyurl.com/kkljp
http://tinyurl.com/o8ze9

Just some interesting metal to play with. Maybe you could make a unique putt putt boat using sodium.
Mark
Presentation is Everything

Post Reply