Odds and ends

[Mark]

Just a review. I wonder what "glass" would be the best?
http://youtube.com/watch?v=8-GOwtikSO0
http://en.wikipedia.org/wiki/Glass

[Mark]

"The copper will maintain it's soft crystal structure after annealing at any realistic cooling rate (from very slow like letting fire die down to fast like throwing it in a bucket of water). Generally, I would suggest water cooling to prevent excessive oxidation of the surface. Steel (iron + carbon) on the other hand will change it's properties dramatically upon rapid cooling . However, it is possible to cool copper fast enough to make it into a brittle material. This normally involves cooling rates of greater than 10 million degrees C per second which can only be obtained by spraying a very thin film on to a very cold surface (this equipment is very expensive)."

http://www.evergreengardenworks.com/copperwi.htm

[Jim Berquist]

Mark: Can that Rupert's drop glass be worked in any fashion? It would be cool to have a priceless figurine made up with it and if some messed with it ,,,,,,it would Explode...


Jim

[Mark]

I remember watching public television with the glass artist Dale Chihuly in his large studio. He and some students were banging out all sorts of interesting creations.
A question arose about a recent piece they had made and sold to Elton John. Apparently they, the students forget to stress relieve/heat treat the piece which I took it to mean that it could "Rupert" itself to pieces out of the blue just sitting perfectly still, the glass might decide to rupture from the internal stress if it wanted to without even being touched.
Chihuly was not happy and reprimanded the students. I guess they would have had to get the piece back from Elton John for a stress relieving treatment.
Chihuly does some really pretty stuff, lots of colors and shapes. I'd love for him to make me an artistic quartz jam jar with glittery sprinkles and nifty colors. Later, as we would become friends, I would have him make me a squid shaped piece of quartz. ha ha ha
Mark
http://en.wikipedia.org/wiki/Dale_Chihuly
http://images.google.com/images?q=chihu ... =N&ndsp=20

[Mike Everman]

a squid shaped piece of quartz. ha ha ha

LOL
I went to his show here in Santa Barbara. Very nice stuff.

[Mark]

http://www.cpimarketing.com/cambria/fil ... 39e23c.jpg
http://www.catrionamclean.com/homedecor ... 20Vase.jpg
http://www.aaf-online.org/pics/wuerth/c ... forces.jpg
http://www.grunwerg.co.uk/Tableware/bud-vases.html

[Jim Berquist]

I think you need a better Test Stand.

I Think you need a Bigger Bottle!

I think you need to show we the people how much power the simple little pipe can provide.

Start Sequence would be like this:

Spark: Check

Fuel on Idle: Check

Start Air Hit, Hit Blast:

Ignition: Check

Run Check: 75 Hz With ETG 1400 degree F.

Idle until units are up to 1500 degree F.

Spark Off:

Announce: Ladies and Gent's....We will start our role out to run way 4 North in a few minutes.......Our ETA Tucson to L.A. is 30 Minutes.

10 Minutes from Role Out and Take off: Announce: Ladies and Gent's We are Currently at 60,000 ft..I will be Initiating Ram Engines Elevating Us to 80,000 ft for the next 15 minutes....You will Experience a slight sense of weightlessness dearing this time. As we will be following a parabolic path.


What is the Max Altitude of a Pulse Jet??


Jim

[heada]

I don't know how serious you were, but most air-breathing engines will not work that high. The atmosphere at 40,000 feet is only 25% that of sea-level and at 80,000 feet it is 4% that of sea-level. Most air-breathing engines have problems above 60,000 feet. The odd exception is the SR-71 in that it has a variable aero-spike in it's engine so it can work to about 85,000 feet(going mach 3+) The sweet spot for a ramjet engine (with fixed intake) is between 30,000 and 60,000 but in that range, you can get to mach 5 or so.

-Aaron

[Jim Berquist]

Head:

One time long ago I was on a C-141 Transport on a hop from Mildinhall to Bangor Main and the pilot stated we are running late.....We are jumping up to 63,000 feet and should be there in another 2 hours....

That was the Fist and Only Time I Seen the Curvature Of The Earth!

This Plane had two windows for the people in the fuselage! One port and one starboard....I spent the next two Hours Standing by the Door looking Outside!!!!!

Don't believe what you hear!

http://www.fas.org/man/dod-101/sys/ac/c-141.htm

Published alt was 41,000,,,,,,I seen it 63,000 and most likely max was like 75,000 ft...


Jim

[Mark]

http://016b1ce.netsolhost.com/photogallery.html

I saw one of these in gleaming stainless steel last night on "The Home and Garden Channel" in some fellow's house. It just struck me that it might build up some feedback if you got the fire and length just right.
http://www.austinurbanspace.com/listing ... g_7431.jpg

These are becoming more popular, maybe you could make a pulsejet test lab out of one. In some show I saw, this man made a home using several.
http://tinyurl.com/36kdxe

[Mark]

Just a few still shots of my day in the yard. It got too hot and sunny so I retreated to the screened in porch and there I had use of the air compressor to air the jet out. It was fussy today so it didn't start on the first try. But it did come to life on some old watery methanol finally. I left my snorkeler outside a few days and it was what was in it. I made a video of it but forgot about the gig memory card not being in the camera so it was only a short 37 second video, but mildly interesting I thought.
It's really too humid to snorkel and single spark start. These primitive toys like the drier air of winter.
Mark

[Mark]

"In the end, it's all about the plumbing."
http://www.popularmechanics.com/science ... 13140.html

[Mark]

http://pdf.aiaa.org/jaPreview/AIAAJ/1998/PVJAIMP443.pdf

[Mark]

"The best known application of pulse combustion is the V-1, a mechanically valved pulsating combustor used to propel a small airplane with a bomb load. Subsequently, a miniature version of this unit (Dyna-Jet) was developed for the model airplane enthusiast; after a brief splurge of popularity, the noise problem with authorities curtailed this hobby."

"Subsequently, the aerodynamically valved S.N.E.C.M.A. "Escopette" (Blunderbuss) pulsejet was developed for the propulsion of target aircraft. A later development, the Ecrevisse (Crayfish) is shown in Figure 4a.

"The U.S. Navy sponsored the development of a pulse combustor for helicopter blade tip. Major disadvantages were noise, stratification caused by centrifugal action, and finally failure of the pulsation to continue against the increased ram effect as the tip speed increased."

[Mark]

I was thinking a jam jar with springy lid/diaphragm is a kind of kazoo if you stretch your imagination a little. Maybe one could design some side ports with diaphragms situated along auxillary tubing in some sort of jam jar device with snorkels and it could play a chord or a few tones at least. Since I saw Mike's collection of kazoos today, it started a curiosity in the kazoo itself. Here's some tidbits/history/clever ideas, perhaps of interest to some. On some level the kazoo is a bit of resonant science.

"It's All About The Resonator..."
http://www.kazoos.com/best.htm
http://jeanluc.matte.free.fr/articles/t ... /kazoo.htm

"A toy musical instrument with a membrane that produces a buzzing sound when a player hums or sings into the mouthpiece."
http://www.answers.com/topic/kazoo
http://en.wikipedia.org/wiki/Membranophone
http://www.aues21.dsl.pipex.com/images/metalKazoo.jpg
http://www.io.com/~sjohn/lcb-kazoo.gif
(In case the above says forbidden, I have scanned it and it's at the bottom of the page.)

A creative use of materials.
http://www.rikkyo.ac.jp/~z5000002/dance ... o-ml-z.htm

http://www.captainkazoo.com/weird.html

http://www.kazoos.com/index3.htm
Some sort of Logan Kazoo.
http://festivalsandevents.com/photo/548 ... 50x188.jpg
http://www.handicstore.dk/ux_pictures/1 ... -kazoo.jpg
http://www.msigeneralstore.com/images/kat_kazoo.jpg
http://www.hobgoblin.com/bigpicswebsite/gr2773b.jpg