Jam Jar Pulse Jet - In Slow Motion

Slow motion study of a pulse jet "jam jar" Reynst experiment. The seven second run near the beginning of the video is the same run shown at 300 fps at the end of the video. Lighting was challenging for the HS camera. If you film it in bright light, you can't see the flames, if you film in total darkness, everything looks grainy. The flames are not real bright while it is running, though the initial, very unusual grape-cluster-like fireball is pretty spectacular.
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The 600 FPS shot, was only a ---3 second run--- in real time. Although grainy, you can see each cycle.




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HOW TO:
1/2" hole used for hole. In order for the jar jet to work, the jar has to be cold. The cold surface cools the gases, creates a partial vacuum, and draws in air and if a flame remains from the last cycle, it will ignite the fresh charge. The cycles operate around 30-40 a second, with occasional sputters. We used some very old model airplane fuel for these shots but it worked fine. Use caution if you decide to do this, adult supervision, safety glasses, etc. The jar will normally crack after a successful run.
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By studying this in high speed, you might decide to make some modifications to improve firing or efficiency. Maybe put a metal nozzle inside, or a metal heatsink at the bottom or a thin wire to act as a glow plug across the flame jet... see how long you can make your version run.
AUTOMATIC VIDEO responses ARE ON, so POST YOUR VIDEO AS a RESPONSE!!!
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music: Jt Bruce " Shoulder of Orion"
www.jamendo.com

Category:

Science & Technology

Tags:

• how
• to
• reynst
• jet
• glass
• methanol
• nitro
• fuel
• slow
• motion
• casio
• exilim
• exf1
• cool
• science
• trick
• pulsejet
• experiment
• demonstration
• study
• thesis
• nitromethane
• jt
• bruce
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• taofledermaus

[mattigi]

what kind of fuel do you use?

[taofledermaus]

@mattigi It is model airplane fuel with 5% nitro.

[rcanton1l1]

what cam are you using

[taofledermaus]

A Casio EX F1 Pro. VIdeo usually comes out much better than this when used in proper lighting.

[catwithhotfish]

amazing =) i love ur high speed videos

[AkoSiBUTCHOY]

wow......

[USAIIROXllALL]

music?

[billhaley1868]

You should do this one again, but this time get yourself a glass Carboy, it'll be much bigger, therefor look MUCH cooler!

Taofledermaus Labs, that effin' cracked me up!

Great video, my man!

[BikerTrashWolf]

sounds kinda like a long wet fart.

I need to read up on how to do this.

[HarHarVideos]

fart in a jar

[ramicaza]

awesome



[mikeb1444]

Do it with a 5 gallon jug. I tried it with a 55 gallon drum. It sounds like a wheezing cow.

[MrHotrod68]

its a honda