Search found 10755 matches

by Mark
Sat Mar 16, 2019 3:57 pm
Forum: Off topic forum
Topic: youtube
Replies: 1458
Views: 172901

Re: youtube

Maybe of interest, be nice to have for some projects.
Drill through anything (conductive) with Electrical Discharge Machining
https://youtube.com/watch?v=rpHYBz7ToII
by Mark
Thu Feb 07, 2019 6:19 pm
Forum: Off topic forum
Topic: youtube
Replies: 1458
Views: 172901

Re: youtube

Skip to around the 2:30 mark and listen when the engine cuts out, the quiet whistling sound as the plane cuts through the air and stunning landing.
https://youtube.com/watch?v=eqM__cZmM48
by Mark
Sun Jan 20, 2019 3:25 pm
Forum: Off topic forum
Topic: youtube
Replies: 1458
Views: 172901

Re: youtube

Some creative designs in putt putt boats, although kind of a sad back story.
https://youtube.com/watch?v=1yYVHfbxK9g
by Mark
Mon Jan 14, 2019 6:00 pm
Forum: Off topic forum
Topic: youtube
Replies: 1458
Views: 172901

Re: youtube

Someone made a pulsejet out of a reed, like one of the ones I have but never got around to using, pictured next to my red Dyna-jet head here.

download/file.php?id=14630&mode=view

Valved pulsejet
https://youtube.com/watch?v=B2DEpeDj2t8
by Mark
Thu Dec 20, 2018 2:40 pm
Forum: Off topic forum
Topic: Nature's Children
Replies: 697
Views: 177240

Re: Nature's Children

Even babies can startle you.
Electric Eel babies
https://youtube.com/watch?v=C4D2xFI5RPA
by Mark
Tue Oct 16, 2018 3:27 pm
Forum: Off topic forum
Topic: Left field
Replies: 599
Views: 84742

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: 1458
Views: 172901

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: 697
Views: 177240

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: 111807

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: 1458
Views: 172901

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: 697
Views: 177240

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: 17832

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: 17832

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: 17832

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: 17832

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...