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simple pulse jet fuel

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Unread postAuthor: DR » Sun Jan 25, 2009 6:49 pm

starman wrote:
DR wrote:This is what can happen, while using acetone for a pulse-jet engine fuel:


Uum DR, the "acetone burn victim" is pretty gruesome but very fake. The website you pointed to is a make-up and prosthetics company... www.alexinwonderland.com located up in the Valley north of Hollywood....yeah, that Hollywood.. :roll:

The denatured alcohol victim link pointed to the wrong/missing link page within Spudfiles somewhere.

What gives...?


Uum - starman, the "acetone burn victim", was in response to your quoted reply of me; Which, in other words, told me and everyone else that I was being overly cautious about the dangers of using denatured alcohol or acetone as a fuel.

The picture is, of course, fake... and the link is, of course, MEANT to lead to a wrong page. - Sarcasm begets sarcasm and was all in good fun.

I don't like thought of ANYone screwin' around with fuels other than gas-line antifreeze or propane, when playing with home-made pulse-jets.

With questions like these ... If you "have to ask", then you "shouldn't be playin' with". - Just my opinion.
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Unread postAuthor: Insomniac » Sun Jan 25, 2009 7:52 pm

The biggest danger with methylated spirits is that it burns clear, meaning you have to double-check that it really has gone out before you pick it up. The worst that can happen with the pulsejet I was using is that somtimes it sprays meths into the air when it lights, which makes a larger-than-normal flame. So long as you arn't dumb enough to look into the exhaust when you try and light it it's reasonably safe. Denatured alcohol is meant to be used as a fuel, in fact it is actually written on the bottle as one of the uses. It's about 95% ethanol, the only real danger is the small amount of methanol they add. Don't go drinking it, bathing in it, or breathing it and you'll be fine.
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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
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Unread postAuthor: starman » Sun Jan 25, 2009 10:14 pm

DR wrote:The picture is, of course, fake... and the link is, of course, MEANT to lead to a wrong page. - Sarcasm begets sarcasm and was all in good fun.

I don't like thought of ANYone screwin' around with fuels other than gas-line antifreeze or propane, when playing with home-made pulse-jets.


Well I'm usually well attuned to detecting sarcasm but I just didn't see it in your original over-the-top MSDS rundown, thus my thoughts on reasonable usage. Sorry bout that one. None of my comments were meant to be sarcastic, I was very serious, which had me wondering What-The-Heck with your fake links. You did notice that I too suggested other more practical fuels.
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Unread postAuthor: DR » Sun Jan 25, 2009 11:32 pm

My "original over-the-top MSDS rundown" was not the post in which I was being sarcastic; it was in reply to your statements afterwards, which may have been (on my part) misinterpreted). - No harm, no foul.

Back on topic though, I am glad that this topic was brought up, because I was actually in the middle of researching pulse-jet design and fabrication again.

I have made many pulse-jets, out of Mason Jars. They're really cool on one end, because you get to see the combustion inside. On the other end, however, they break quickly.

Make magazine has an article which shows how to use copper DWV fittings internally, to acts as a difusser, so that the jars do not break as quickly. I've has some run as long as 2-3 minutes, before failing, by using a diffuser.

I was mentioning this to my wife this weekend, as I was trying to figure out what type of canned good would be easy to drain out of the can, without having to actually remove the lid. - She immediately suggested "Chicken Broth".

Looks like I'll be buying half-a-dozen can of chicken broth and some Heet tomorrow.
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Unread postAuthor: Insomniac » Mon Jan 26, 2009 1:39 am

I wonder how difficult it would be to run this design on propane?
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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
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