Search found 10690 matches

by Mark
Fri Nov 17, 2017 8:46 am
Forum: Off topic forum
Topic: youtube
Replies: 1435
Views: 134956

Re: youtube

by Mark
Thu Nov 16, 2017 1:11 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

So I bought some borosiicate bottles in the 80,100, and 150 ml sizes. They're the "diameter of 47 mm series" from China. The borosilicate glass seems to have more clarity or sparkle over ordinary soda lime glass, you notice it when holding one in your hand, but the difference is subtle. From some an...
by Mark
Mon Nov 13, 2017 7:35 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

Revisiting the Gatlin gun today and after a few false starts and staccato short revs it finally stabilized for a minute after putting the proper amount of fuel in the tank. The yard hose was used to cool it between starts because if it's hot the fuel/air ratio gets thrown off even after you air it o...
by Mark
Sun Nov 12, 2017 2:08 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

Tidbits That's 2732 degrees Fahrenheit ... "The main reason we are asked to build such items from quartz is the greatly improved thermal shock characteristics of quartz over any other type of glass. Fast acting, high heat releasing reactions that will crack Pyrex® or other glassware do not even stre...
by Mark
Wed Nov 08, 2017 6:28 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

I was trying to think of something the little quartz vial could do, say to cause motion in bees or hummingbirds, a little kinetic art diorama of some sort. There's several designs of fidget spinners, they could spin up under the power of these tiny quartz jets, but nothing really enthralling has com...
by Mark
Wed Nov 08, 2017 4:39 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

Here you can see some of the haze but from other angles, even more is apparent. The hole is nicely formed. The shape sort of reminds me of one of the many typical vacuum tubes you'd see in the back of an old television set or something. Quartz resonator - ha https://www.ebay.com/itm/2-X-Tube-Quartz-...
by Mark
Wed Nov 08, 2017 2:59 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

So I bought a 750 ml borosilicate storage jar with a thick bamboo lid and silicone gasket. It ought to hold up for some experiments but jars of that size can really kick or go bang if you don't keep the lid on tight or if the hole is too small. And if you ignite the jar from the inside as opposed to...
by Mark
Tue Nov 07, 2017 8:11 pm
Forum: Off topic forum
Topic: youtube
Replies: 1435
Views: 134956

Re: youtube

The Lava Lamps That Help Keep The Internet Secure
https://www.youtube.com/watch?v=1cUUfMeOijg
by Mark
Sun Nov 05, 2017 3:16 am
Forum: Off topic forum
Topic: youtube
Replies: 1435
Views: 134956

Re: youtube

How Heat-Resistant (Borosilicate) Glassware Is Manufactured
https://www.youtube.com/watch?v=PWdvQIBAzhk
by Mark
Fri Nov 03, 2017 12:59 pm
Forum: Off topic forum
Topic: youtube
Replies: 1435
Views: 134956

Re: youtube

I want to make a big putt-putt boat. have a meet and do races or something Tidbits from 2005 - Just old stuff "You can also use a single piece of copper tubing with one end pinched closed. This might be thought of as a "half" of a typical putt putt engine. A fellow I conversed with was using such a...
by Mark
Fri Nov 03, 2017 12:55 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

Just some odd shapes that probably wouldn't jam as is but it's tempting to think about making something heart-shaped or looping that would. http://2.bp.blogspot.com/_dfjCCzJFU9s/SOM5F5jFyoI/AAAAAAAABHs/mCvZF2bOx8M/s1600-h/VerreMeneauRed6.jpg http://grandcoeurbigheart.blogspot.com/ http://the-strange...
by Mark
Wed Nov 01, 2017 2:26 pm
Forum: Off topic forum
Topic: youtube
Replies: 1435
Views: 134956

Re: youtube

Putt-putt boats would be more auditory friendly.
by Mark
Wed Nov 01, 2017 1:40 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1691
Views: 244741

Re: Odds and ends

The past couple of weeks I've ordered some small borosilicate vials and containers. Maybe for some jam jar jet applications they would hold up fine or for more than one trial. After all we've seen ordinary jam jars occasionally last about a minute and borosilicate has even better thermal properties....
by Mark
Wed Nov 01, 2017 1:10 am
Forum: Off topic forum
Topic: youtube
Replies: 1435
Views: 134956

Re: youtube

"It is a compact, pulse jet using a drug bottle. A hole of 6 mm is drilled in the lid of the bottle."
Bottle pulse jet
https://www.youtube.com/watch?v=RD9tMbgvfn8

Not a bad demo
https://www.youtube.com/watch?v=JkWpQRS3vkY

Glass tube putt-putt boat.
https://www.youtube.com/watch?v=JokZp3zXhEU#t=1m17s
by Mark
Wed Nov 01, 2017 12:46 am
Forum: Off topic forum
Topic: youtube
Replies: 1435
Views: 134956

Re: youtube

A pulse jet with a jam jar jet exhaust port
自作小型パルスジェットエンジンで風車回し2 pulse jet engine
https://www.youtube.com/watch?v=rnqfKCuFrss
https://www.youtube.com/watch?v=sBaAxmueDLM

Jam jar jet boat
https://www.youtube.com/watch?v=MKMab6pJwas