Glass CC

[metiz]

This is a concept I did last night, took me about 90 minutes. The cc is made of a glass jar, intake an exhaust are welded on the .3 mm lid (pain in the ass) the length of the pipes are both guestimates. ill cut and weld on as long as it takes for this thing to run. anyone can spare a high speed cam?

I've seen a video on glass forming and I was thinking on making a very simple, linear, coneless engine completely out of glass. If it would even last for 5 seconds, it would make some fine video

[Mike Everman]

Oh yes, that would be a hundred dollar video. Maybe more. I've always wanted to do that. I have a glass cc that's a bit too long for it, but tapers nicely at both ends where tubes could be attached. I have access to an ingas camera for when I do it if ever. Have you tried to start that one?

[Zippiot]

Make it out of Quartz so it can run for hours!!!!
Silicon sand isnt too expensive the real quartz only type. Just use a welding torch to get it to melt...I dunno where Im going with this it would be a fantastic failure
Find an old crystal jar and get it really hot work it into whatever shape you want!!!!!

[Ghrey]

Word to wise.....


My Glass ram jet shattered, violently.


Be prepared. don't get fragged.

[Chadly33]

Ha! I have one of those in the garage! just a jam-jar with an exhaust and an intake though it runs, but only for a few seconds though on methylated spirits.never bothered to post it as I thought it would have been done before. Meybe I should hook it up to my camp stove to see how long it takes to detonate!lol

[Sebastian LFT]

That would make for a pretty cool video(questions answered and more questions asked). I've toyed with the idea of using bits and pieces of laboratory glassware. Lots and lots of good shapes to chose from and all you'd need to do is fuse the chunks together to make what ever style pulse jet you wanted...day dreaming commencing now......................................

Good luck! Can't wait to see it in action

[Mark]

Thermal performance
"One of the most important performances of fused quartz is its extremely low coefficient of
expansion: 5.5 x 10 -7 mm℃ (20-320℃). Its coefficient is 1/34 that of copper’s and only 1/7
of borosilicate glass’. Therefore, this makes the material particularly useful for optical flats,
mirrors, furnace windows and critical optical applications, which require minimum sensitivity
to thermal changes."

Attention to microphone popping would be nice too. Glad she wasn't reading the poem Peter Piper for a presentation.
"Is glass for you? Let's find out together." ha
http://www.youtube.com/watch?v=9Wm7gMTK ... otech.com/
http://www.vitrotech.com/

Here's a bevy of quartz. Think of all the artistic pulsejet and jam jar wonders you could make with this stuff.
http://www.fusedsilicaquartztube.com/pr ... tztube.htm

[Zippiot]

You can cut quartz with an oxy-acetylene torch, so I assume you can take a step back and heat it to the point that it could be worked.

[larry cottrill]

Quartz can actually be worked with an oxy-natural gas flame in what's called an "oxygen blowpipe" -- just a fancy name for a kind of Bunsen burner on steroids that has an oxygen valve (instead of the little adjustable air louvres). It takes persistence and patience to do good work (as in most things). Of course, to make (or modify) a big jar, it would take a pretty huge flame and some good tools for handling the molten mass. It is actually possible to embed some metal fittings into quartz, but I think that's sort of an "industrial engineering" concept. Ha. I don't know whether any metal will work, or only ones that have the characteristic of low thermal expansion. In my ham radio days, I was always amazed at some of the ways metal electrodes were sealed into the glass envelopes of vacuum tubes where they went through from the outside. You'd think those joints would leak like a sieve, but they obviously didn't -- there are antique radios from the early 1900s that are still running. Amazing.

L Cottrill

[Al Belli]

Hi Larry,

The glass seals were made using a nickel based alloy, Kovar.

Frim Wiki---

Kovar (trademark of Carpenter Technology Corporation) is a nickel-cobalt ferrous alloy designed to be compatible with the thermal expansion characteristics of borosilicate glass (~5×10-6 /K between 30 and 200°C, to ~10×10-6 /K at 800°C) in order to allow direct mechanical connections over a range of temperatures. It finds application in electroplated conductors entering glass envelopes of electronic parts such as vacuum tubes (valves), X-ray and Microwave tubes and some lightbulbs.

Al Belli

[Zippiot]

Borosilicate...Pyrex?

[metiz]

earogell?

[Vermin]

I have contemplated this just for fun and have some parts waiting
50ml earlmyer flask (CC)
10ml graduated cyl (intake)
25ml graduated cyl (exhaust)
Components are borocylicate lab glass easy to form and weld with a pencil tip propane torch......would be kewl to watch until it structuraly failed.
V

[metiz]

Ha now that's cool! go build that sucker

[Charles]

Hey there,

I really liked your idea and now it's coming together, have you any updates I'd love to see your progress

Charlie