Search found 10749 matches

by Mark
Mon Dec 25, 2017 1:05 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

by Mark
Thu Dec 21, 2017 3:05 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

If you lived somewhere where there was an ice-covered pond, something like this sleigh wine bottle holder would be cute propelled by a wine bottle snorkeler, albeit briefly whatever time is allowed before the glass self-destructed. Too bad they don't make quartz wine bottles. Or wouldn't it be nice ...
by Mark
Thu Dec 21, 2017 1:57 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

Something exquisitely easy occurred this evening dinking around with a wine bottle. At first I wound some aluminum tape around a piece of tubing after sticking it down the neck of this wine bottle. But It was roughly flush with where the neck enters the main region of the bottle and I didn't get any...
by Mark
Wed Dec 20, 2017 2:35 pm
Forum: Off topic forum
Topic: youtube
Replies: 1454
Views: 160905

Re: youtube

3D-printed objects fit perfectly together
https://gfycat.com/AbsoluteEsteemedBasil
The Tallest & Tiniest Twist Containers Ever!
https://www.youtube.com/watch?v=zeK5XfstMLU
by Mark
Sun Dec 17, 2017 10:49 pm
Forum: Off topic forum
Topic: youtube
Replies: 1454
Views: 160905

Re: youtube

I recall probably several years ago pondering that swan vase/decanter he tried, wondering if something like that might be fun to tinker with. Here he has an illustrative demonstration of using too thin of glass. It was fortuitous he was looking toward the camera when it gave way. Model Rocket Engine...
by Mark
Wed Dec 13, 2017 3:06 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

Well it may not seem like much, but I finally got the perky 1/2 inch diameter snorkel on the 12 ounce paintball tank to sustain for a full grease 5 second run. Instead of the typical 30 ml of methanol in the tank and endless attempts, something around 50 ml was used and the tank maybe held at a slig...
by Mark
Mon Dec 11, 2017 2:39 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

Another thing tried was a spark plug on a beer bottle starting the propagation internally instead of at the exhaust end using a Bic lighter. And it seems to be more reliable for getting the bottle to rev up. On time, all 5 tries produced a good starting impulse with revving whereas if lit from the t...
by Mark
Sun Dec 10, 2017 12:38 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

So another jam jar of modest results. Perhaps the fuel/air ratio is more fragile with smaller sizes as the heat builds up evaporating more fuel than it can use. Also the fuel becomes watery as it runs of course, the byproducts of combustion CO2 and H2O. 2CH3OH + 3O2 ===> 2CO2 + 4H2O Jam Jar Jet Mini...
by Mark
Fri Dec 01, 2017 4:14 pm
Forum: Off topic forum
Topic: youtube
Replies: 1454
Views: 160905

Re: youtube

Inflating Evacuation Slides https://www.youtube.com/watch?v=nM8P6TtcrFY This entraining aspect made me think of the Gluhareff pressure jet to some extent. "Slides inflate with an initial boost from a canister of compressed carbon dioxide and nitrogen. The canister provides only about one-third the v...
by Mark
Wed Nov 29, 2017 2:50 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

Yesterday I tried an experiment with this 3/4 inch diameter exhaust snorkeler http://www.pulse-jets.com/phpbb3/download/file.php?id=14741&mode=view because of the tall faint flame I saw with the piglet snorkeler with the larger diameter 1.25 inch diameter snorkel I videod the other day. It's just ea...
by Mark
Fri Nov 24, 2017 6:18 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

Some future plans are to string this Nilo filler wire I bought for some Curie point experiments across the length of the yard which gives me about 110 feet if I max out and if really crazy there is the diagonal which would provide even more length. But the aim or hope is to wire guide little beer bo...
by Mark
Fri Nov 24, 2017 5:24 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

This is the failed J-bend arrangement. It may be that not only the diameter could be too large and/or the bend too sharp but also the length too long as well.
by Mark
Fri Nov 24, 2017 1:57 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

So I got around to videoing a piglet snorkeler with the larger diameter snorkel I had mentioned in previous posts. Traditionally it ran on a 1 inch diameter intake/exhaust. To recount, one day when it wasn't much above freezing outside, the 1.25 inch configuration was really rocking big time. It's u...
by Mark
Fri Nov 17, 2017 9:36 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288335

Re: Odds and ends

In other news I'm hoping to take an introductory 3 hour lampworking class and then I can rent the room by the hour by myself. Maybe if I can get some extra dark glasses instead of the didymium ones the art studio has I can do some of my quartz tubing too. I wish they had a lathe for the glass though...
by Mark
Fri Nov 17, 2017 8:46 am
Forum: Off topic forum
Topic: youtube
Replies: 1454
Views: 160905

Re: youtube