Search found 10814 matches

by Mark
Sun Dec 22, 2019 1:57 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

Absolut French Ending Jam Jar Jet
https://www.youtube.com/watch?v=ImmewZnfjtE
by Mark
Sat Dec 21, 2019 5:46 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

I noticed there's a distortion or heat stress effect of a black band around the Absolut vodka bottle only seen when held at an acute angle. The band goes completely around the bottle from the individually glued on letters on front to the clear plastic ~1 inch wide strip on the back of the bottle. Th...
by Mark
Sat Dec 21, 2019 12:10 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

by Mark
Fri Dec 20, 2019 10:54 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

by Mark
Mon Dec 16, 2019 4:22 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

On the Princess oil lamp I found some warnings on an eBay offering. "Use only lamp oil. Do not use gasoline, alcohol, or solvents as fuel in this or any other oil lamp. Failure to follow these instructions may cause fire or explosion which could result in property damage or serious personal injury f...
by Mark
Sat Dec 14, 2019 10:01 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

Some morning mediocrity ... Quartz Test Tube Jam Jar Jet Being Fussy https://www.youtube.com/watch?v=GfUf8ruHmYM Quartz Test Tube Jam Jar Jet with Quartz Exhaust Tube https://www.youtube.com/watch?v=310eYsDJolo The vertical try just didn't want to sustain. I used some soft monel gauze underneath the...
by Mark
Sat Dec 14, 2019 9:42 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

The Princess House jam jar jet is exactly the same diameter and so close to the same height as a Smucker"s jam jar jet. The hole in the top of the oil lamp is a mere 5/16 but happily it works well enough/energetically for that volume- about 1/9 the width of the jar. I'm thinking it might be borosili...
by Mark
Sat Dec 14, 2019 12:30 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

Yet another "will it jam?" shape comes to life. In other news my new sound meter which measures my TV sounds not turned up high but quiet normal in the 40's decibel range but my aluminum Budweiser beer bottle snorkeler sampled a 123 dB peak 18 inches away from the exhaust. I don't know how useful it...
by Mark
Tue Dec 10, 2019 6:06 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

It may be that the smallish volume of the 11 ounce Guinness beer bottle isn't quite large enough to match the flow of the snorkel here. Recall this snorkel was used on the previous Radnoti glass experiment. On the other hand a larger snorkel on the Radnoti would make more thrust and sound. Restricti...
by Mark
Tue Dec 10, 2019 1:47 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

Well I finally got around to using the Radnoti glass you sent me Mike. It's had some strong revs with larger diameter tubing too. Very fast combustion requires very precise fueling and seemingly exacting selection of tubing size. It can cause quite a bit of dismay all the lengths and diameters that ...
by Mark
Sun Dec 08, 2019 4:38 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

There are not many thrust tests on jam jars but I did find this one.
https://www.youtube.com/watch?v=p23NGY7Lgek
by Mark
Sat Dec 07, 2019 6:09 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

Tidbits aside from moisture taking up space that would otherwise contain more O2 and N2. "The atmospheric pressure, temperature and humidity all affect the density of the air. On a hot day, or at high altitude, or on a moist day, the air is less dense. A reduction in air density reduces the amount o...
by Mark
Sat Dec 07, 2019 6:08 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

I did a couple of trials on the Seltzer Jet and it produced a thrust of a little over 360 grams or about 12.7 ounces of sound! On an ideal weather day and/or tuned snorkel to seltzer tank it seems conceivable to achieve a pound of thrust. A pound of thrust would be a little over a half the static th...
by Mark
Sat Dec 07, 2019 3:15 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

Although a wind chime calculator video and stuff, this was kind of interesting. If you skip to the 25 minute mark he talks about the missing fundamental of a tube that should be making C2 or 60 Hz, something obvious but I hadn't thought of, the "naked chime" effect. I noticed the same effect I think...
by Mark
Fri Dec 06, 2019 9:06 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1770
Views: 369705

Re: Odds and ends

Seltzer Jet Ramblings ... Although seemingly rather subdued as it flags and dies, the effect belies or gives a false impression because this Seltzer jet is actually pretty loud. I ran it in my garage with the garage door cracked about about a foot hoping to minimize noise to my neighbors. I will get...