Search found 10734 matches

by Mark
Tue Aug 14, 2018 1:40 am
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

I wonder if you could start a Dyna-jet by angling the tail up say 30 degrees so that the fuel level in a clear/transparent fuel line could be carefully walked right up to the metering jet ready to go without entering or dribbling into the combustion chamber. Then with the combustion chamber filled w...
by Mark
Thu Aug 02, 2018 2:13 pm
Forum: Off topic forum
Topic: Nature's Children
Replies: 694
Views: 166651

Re: Nature's Children

Of beetles and beer bottles ...
https://youtube.com/watch?v=UMy5-X_wRBQ
Another video at the bottom of this article.
https://www.npr.org/sections/krulwich/2 ... eer-bottle
by Mark
Sat Jul 28, 2018 4:46 pm
Forum: Off topic forum
Topic: Nature's Children
Replies: 694
Views: 166651

Re: Nature's Children

Roosters Have Special Ears So They Don’t Crow Themselves To Deaf "Loud sounds (above 120 decibels) can cause permanent hearing losses because the intense air pressure waves can damage and even kill the cells that translate sounds into neurological signals. At more than 130 decibels, it takes less th...
by Mark
Sun Jun 24, 2018 8:25 pm
Forum: Valveless pulsejet forum
Topic: Please put your "I am new and need help" question here.
Replies: 372
Views: 1735691

Re: Please put your "I am new and need help" question here.

Liking all this! So, what I liked about the Harbor Freight burner (I've had one for years) is it's a cheap way to get a nice high flow needle valve with all the hookup stuff to the tank. Though I mostly use just the tank valve which takes a fine touch when starting a small linear like this with com...
by Mark
Sat Jun 23, 2018 11:31 pm
Forum: Valveless pulsejet forum
Topic: Please put your "I am new and need help" question here.
Replies: 372
Views: 1735691

Re: Please put your "I am new and need help" question here.

Remember the little high voltage modules aren't meant to run continuously. You could shorten the gap distance and use the lowest power to run them which would help. I was just toying with one and if you put the wires closer together it will turn on with a 1.5 volt flashlight battery. But anyway they...
by Mark
Thu May 31, 2018 7:28 pm
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

3D print your brain, timelapse, high-res microfluidics, custom colors...
https://youtube.com/watch?v=7Z8uPHL52Q0
by Mark
Sun Mar 25, 2018 1:29 am
Forum: Valveless pulsejet forum
Topic: Glow plug can start pulsejet?
Replies: 6
Views: 3181

Re: Glow plug can start pulsejet?

1968 I had a small hobby pulse jet engine smaller than the Dyna Jet Engine it used a model airplane glow plug to get it started. It had a place on the nose of the engine to connect a model airplane fuel line to a model airplane fuel tank. The engine ran on model airplane fuel. The engine came with ...
by Mark
Thu Mar 22, 2018 2:31 pm
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

Interesting little vortex rings from leaks in the tailpipe.
Looking down a Pulse Jet Engine as it runs.!
https://www.youtube.com/watch?v=itzXhntGolc#t=42s
by Mark
Wed Mar 21, 2018 10:28 pm
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

"Could not even maintain level flight"
Pulse jet glider - the 1955 Bocian Puls [Vintage Sky]
https://www.youtube.com/watch?v=MXKe1erYRDY
by Mark
Sun Mar 11, 2018 4:10 am
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

I liked the inventive airing out method and the young teamwork and simple design using rocks in the second clip.
https://www.youtube.com/watch?v=hCdYExezMhU
https://www.youtube.com/watch?v=lIuj3gr8mgs
by Mark
Sun Mar 04, 2018 7:13 pm
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

Might be exciting to try a jam jar jet at 2.5 atmospheres.
Opening a Soda on the Ocean Floor
https://www.youtube.com/watch?v=EJiUWBiM8HE
by Mark
Sun Mar 04, 2018 3:40 am
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

See if you can spot something funny.
Os pulse jet
https://www.youtube.com/watch?v=H4A4Qn4pInU
by Mark
Thu Feb 15, 2018 6:48 pm
Forum: Off topic forum
Topic: youtube
Replies: 1451
Views: 152886

Re: youtube

Kind of a Logan look to it. Not wild about breathing smoke though, but interesting for a home-built and for the fact that it looks like a "working" pulsejet rather than recreational. Home made PULSEJET Pulse jet engine Completion of smoke mist Katsuhiro Amemori https://www.youtube.com/watch?v=ACv3wL...
by Mark
Tue Feb 13, 2018 3:54 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 277715

Re: Odds and ends

That Norwegian thesis had some fun facts to ponder over. Funny that substituting one relatively inert gas for the other can make such a difference as when they switched the nitrogen to helium for example and that hydrogen doesn't produce as much pressure piling as a slower fuel. I noticed on this ca...