EBay musings

[Jim Berquist]

Wow! The voice add took me by surprise...Never seen that before.

[Mark]

If you made little widgets like this, it would be fun to install them in little pipe lengths and have a quicko/instant pulsejet. Those straight duct pulsejets are easy to make. ha
Another thing, a light little straight duct tube with a simple reed would be fun I think, nothing fancy, but a curiousity none-the-less. I'm thinking it would be a step-up from a jam jar, but still keeping the project pleasantly simple.
I've posted this reed before but this time it has an internal view.
Wouldn't it be nice to have a disposable pulsejet, something very inexpensive you put together in minutes and have it burn up in seconds, like little bottle rockets? Maybe make them out of paper and shim stock or if you could find ultra thin-walled tubing ...
Imagine instant reving "whizzers" that would be safe to lauch up into the air, with little spongy nose cones/Schultz-Grunow caps, (ha), so that when they came down they wouldn't hurt in the least, having just enough fuel for a few seconds of fun. Again, all in the spirit of simplicity like the putt-putt boat or the now ubiquitous jam jar.
http://tinyurl.com/3dymz2

[Jim Berquist]

Looks related to the Spark Plug tire inflation valve!

[Mark]

http://tinyurl.com/2pcnja

[Mark]

Just a reed that looks like a giant razor blade.
http://tinyurl.com/2f79lh

[Mark]

Mocking shapes. Would be nice to have some shapes in quartz.
http://tinyurl.com/2a36zx
http://tinyurl.com/2q4yoe

I found out a few tidbits about my quartz tubing by writing the company.

{Hi Mark,
We have found some old paperwork which I can with 100% accuracy say
that part#1565 was produced for Nortel and the material is Heralux WG material. That is Flame fused natural quartz crystals. OH content 130-180ppm, <50ppm Cl This natural base material was taken from mines in Madagascar in Africa.}

(The stuff, waveguide tubing I bought.)
http://tinyurl.com/25gczz

I might have to name my first quartz pulsejet after a lemur or something. They're kind of cute.
http://www.dumondconservancy.org/dc2005 ... lemur8.jpg
"Thermographic image of a Ring-tailed Lemur in the morning sun."
http://en.wikipedia.org/wiki/Image:Wiki ... _lemur.jpg

Biology
"Lemurs are found naturally only on the island of Madagascar and some smaller surrounding islands, including the Isle of Jam Jars." ha
http://en.wikipedia.org/wiki/Lemur
http://images.google.com/images?q=lemur ... art=0&sa=N

And then I came across this.
"Small Global Deposits of Clear Quartz"
Alta, Australia, Cumberland England, British Columbia, Gaspé Penninsula and The Bay of Fundy in Canada, Germany, India, Japan, Madagascar, Malagasy Republic, Man, Mexico, Namibia, Pakistan, Sri Lanka and St. Gotthard, Switzerland.
http://www.jewelrysupplier.com/2_quartz ... graphy.htm

[Mark]

Just another shape/structure, it kind of reminded me of my round version. Maybe of some use for something.
http://tinyurl.com/2ek2vz

[Mark]

It's tempting to imagine some sort of semipermeable grid that obstructs flow enough to reflect pressure waves while still allowing for breathing.
Or just something that did something different, working on some new principle or variation on a theme. ha


"They are 26 1/2" long and 2" round."
http://tinyurl.com/37c4wl

[Mark]

http://tinyurl.com/2r8ska

[Mark]

Just a funny shape that could work I suppose if internally altered. Would be nice though if you could take it out and play a song after a run. Or maybe leave it installed on the pulsejet and play some notes somehow. Each valve could be a different length maybe in the key of D? like the one pictured. "Valved" ha
"It's a revolutionary new harmonica with draw cycle valve system that circulates air to allow note bending in the blow as well as the draw cycle. Its note bending abilities will make your music magical!"
Yes, I have lost any sense of reality.
http://tinyurl.com/yrbtrw
This intake kind of reminded me of the harmonica shape.
http://tinyurl.com/2p97z2

[Mark]

I'm always looking for odd things to make a pulsejet out of. Perhaps you could drill the holes all the way out in this centrifuge rotor and put some petal valves on it. The center hole might entertain both a long reach spark plug and vavle retainer or some sort of fueling apparatus too. Again, just toying with the unusual, nothing ideal here.
http://tinyurl.com/3c6svf

[Mark]

I have a chrome-plated jam jar I really like "made" out of a syringe. This one kind of looks like a snorkeler. ha
http://tinyurl.com/ynne2w

Just an interesting design.
http://tinyurl.com/yuqa5n

Something for your stirling engine addiction perhaps.
http://tinyurl.com/2865xa

Variation on a theme. The Ray Bradbury effect. ha

"When the air in the fire syringe is compressed, it is done so fast and efficiently, so that it can reach a temperature of over 260 degrees C (500 degrees F). As paper burns at 235 dgrees C (454 degrees F), the small pieces of tissue paper ignite."
http://www.trippensee.com/vw_prdct_mdl. ... l_cd=15110

[Mark]

Some videos at the bottom too. Graphite pistons and pretty colors. Mass production it looks like. ha
http://tinyurl.com/2jd4g9
http://www.stirlingengine.co.uk/

[Mark]

"Nano coated aluminium power piston, the ultimate combination for this application
This combination is graphite free and does not wear
The micron precision power piston is hollow and super light weight"

There are some 4 and 8 cylinder ones at the bottom of the page.
http://tinyurl.com/2v5rwu

[Mark]

It might be fun to try and make a jam jar with cooling fins out of this cylinder. Or find something similar. Maybe even use some reeds with it.
And secondly, here is a cylinder head with a pre-formed threaded hole for your improvised jam jar intake/exhaust instead of having a spark plug there. ha
http://tinyurl.com/2bznva
http://tinyurl.com/2pl9qc
Maybe the two other ports could be used for something as well, whatever creative snorkeley device you can contrive. Or you could just start out plugging those with a couple of bolts. Or feed fuel down one of them or .... on and on and on.
http://tinyurl.com/3a8442
More ideas.
http://tinyurl.com/2qcu7z