Search found 10750 matches

by Mark
Tue Oct 16, 2018 3:27 pm
Forum: Off topic forum
Topic: Left field
Replies: 599
Views: 80413

Re: Left field

This fellow even created nostalgic model toy kits to go along with the pretense. Seems like something Larry C. would have liked, he was into retro stuff I recall. Definitely a surreal left field endeavor - Project Wool Over Your Eyes. The ammo box with the RAYOVAC battery and accessories hurts my he...
by Mark
Sat Oct 06, 2018 12:22 am
Forum: Off topic forum
Topic: youtube
Replies: 1454
Views: 164041

Re: youtube

Thermoacoustic Heat Engine from Syringe. Part 2 (generator)
https://youtube.com/watch?v=rh78vsyGwXI
by Mark
Thu Oct 04, 2018 1:11 am
Forum: Off topic forum
Topic: Nature's Children
Replies: 696
Views: 171780

Re: Nature's Children

Starting around the 5 minute mark the video becomes quite worrisome and horrifying off the coast of Australia.
Drowning in Plastic
https://www.dailymotion.com/video/x6uk7h5
by Mark
Tue Sep 25, 2018 5:15 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 104367

Re: Mike's Build Log

That looks like a nice pickle slicer. I looked for various steel/heat resistant impellors to spin up but never found anything suitable or low cost.. But the jet ski prop idea seems like something fun to try. Is that a skateboard wheel on the end of the shaft? As an aside, I bought a few sets of whee...
by Mark
Tue Sep 18, 2018 2:34 am
Forum: Off topic forum
Topic: youtube
Replies: 1454
Views: 164041

Re: youtube

Here's a curious fire tornado vs fire hose. Somehow in an abstract way I imagined a jam jar jet effect without the jar, the fuel cellulose instead of methanol and a chimney feedback effect without the chimney. Although the flow is more of a steady state, the center fire vortex might have resonate pr...
by Mark
Fri Aug 31, 2018 2:36 pm
Forum: Off topic forum
Topic: Nature's Children
Replies: 696
Views: 171780

Re: Nature's Children

"To my horror, in about 30, 40 minutes, all the lobsters were killed." (1000 lobsters!) Video narration at the bottom of the article.
When Snails Attack
http://blogs.discovermagazine.com/scien ... 4jQqahOk1K
by Mark
Thu Aug 30, 2018 8:19 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

This might be something to employ if you wanted a region of a quartz tube to be conductive. I like the mirror-like finish. Graphite will take a lot of heat, although it might slowly react/burn up eventually if red hot in an oxygen atmosphere. Coating Quartz Glass Tube In Graphite https://youtube.com...
by Mark
Tue Aug 28, 2018 1:59 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

Have you an idea of how to hold the quartz with something soft yet high temperature? A metal clamp with some sort of gasket material?
by Mark
Mon Aug 27, 2018 5:18 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

That sounds great. Flexible saw blades tend to walk if not guided, from my experience. If you had a stencil source, there's that low cost, easy to use etching creme that might be fun to embellish a section of the glass tubing with a salamander/symbol of fire or other creatures or lettering. Also a s...
by Mark
Sun Aug 26, 2018 5:59 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

This seems easy enough but still you'd have to sand it. I like the fine wire cutting approach because the chipping at the end of the cut would probably be minor. But the tiny wire is probably fragile/snaps easily being so thin and might wear out after not that many cuts although it's inexpensive. ht...
by Mark
Sat Aug 25, 2018 2:06 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

I just ordered a meter of "diamond wire saw" for $1.92 off eBay just to see how it does. You could cut fine gill slits or other patterns in the tubing. Also there's this diamond bandsaw blade if you could construct something to hold or drive it. Maybe even cut the tubing under water. New MD37718 Rep...
by Mark
Sat Aug 25, 2018 12:28 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

Some parameters GLASS AND THE SPACE ORBITER "Fused silica glass consists of a single oxide. This glass consists simply of silica (silicon dioxide) in the noncrystalline or amorphous state. Adding anything to it puts it in another category. Fused silica is the most expensive of all glasses and shows ...
by Mark
Thu Aug 23, 2018 7:36 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

All you have to do is draw the design and send/email it off to Jam Jar Land. But be specific about internal edges where the diameter changes, you probably don't want turbulence inducing blobby parts where sections are fused. Or maybe they could blow it all in one piece. Not to worry, they will send ...
by Mark
Thu Aug 23, 2018 1:44 am
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

In keeping with the theme, I bought some 4 mm OD X 2 mm ID quartz tubing that might be useful as a fuel feed line. I got a piece as hot as I could get it with a torch and then submerged it in a glass of water. It sizzled and then popped and pinged and I was sure it cracked but it held up unfazed whe...
by Mark
Mon Aug 20, 2018 7:48 pm
Forum: Tools and Construction
Topic: Quartz
Replies: 42
Views: 16009

Re: Quartz

Hey Mark, hope all is well! Getting ready to cut some of that Quartz tube you sent me lo these many years hence. I wonder if scoring it in the lathe with a glass cutter and break will work? I do need to grind the ends flush to a specific length, too. As I recall but can't find it was you were a fan...