Search found 10938 matches

by Mark
Tue Sep 19, 2023 5:03 pm
Forum: Off topic forum
Topic: youtube
Replies: 1510
Views: 537198

Re: youtube

ROBOFORMING: The Future of Metalworking?
https://www.youtube.com/watch?v=dCXu8Ju_fdY
by Mark
Wed Jun 14, 2023 7:54 pm
Forum: Valveless pulsejet forum
Topic: University research project topic
Replies: 3
Views: 1121

Re: University research project topic

I remember a design where the intakes and exhausts ends were directed facing into each other with a cowling over them which collected or vented the thrust. https://www.pulse-jets.com/phpbb3/download/file.php?id=4342 https://www.pulse-jets.com/phpbb3/download/file.php?id=4343 Here's this maybe of int...
by Mark
Tue Jun 06, 2023 7:27 pm
Forum: Off topic forum
Topic: Nature's Children
Replies: 700
Views: 357726

Re: Nature's Children

Mark wrote:
Mon Jun 05, 2023 3:24 pm
An interesting flashing effect using silica nano spheres is used by a clam.
The electric clam is at the 10:45 minute mark.
https://youtu.be/Qw68XQQu55s


https://youtu.be/GRzeNlqnRxU
More thoughts on the nano spheres reflection
https://youtu.be/OLyeqo1qRVg
https://youtu.be/3GLZAIaXudk
by Mark
Mon Jun 05, 2023 3:24 pm
Forum: Off topic forum
Topic: Nature's Children
Replies: 700
Views: 357726

Re: Nature's Children

An interesting flashing effect using silica nano spheres is used by a clam.
The electric clam is at the 10:45 minute mark.
https://youtu.be/Qw68XQQu55s


https://youtu.be/GRzeNlqnRxU
More thoughts on the nano spheres reflection
https://youtu.be/OLyeqo1qRVg
by Mark
Sun May 07, 2023 2:33 pm
Forum: Off topic forum
Topic: youtube
Replies: 1510
Views: 537198

Re: youtube

How this Tiny Motor is More POWERFUL than Your Car
https://youtu.be/W39yEt4R-SU
by Mark
Sat Apr 29, 2023 2:00 pm
Forum: Off topic forum
Topic: youtube
Replies: 1510
Views: 537198

Re: youtube

Viewer comment ...
"The frequency of the camera and jet is awesome with the way it looks like the exhaust flames are getting sucked into the jet"

V1 Triebwerk Pulso Pulsejet Pulsojet
https://youtu.be/L8H-6DaPFWg
by Mark
Sun Apr 23, 2023 7:35 pm
Forum: Off topic forum
Topic: Dyna-Jet-Jerry
Replies: 5
Views: 3761

Re: Dyna-Jet-Jerry

I am interested.
by Mark
Mon Apr 10, 2023 9:01 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

I saw this engine which is just a can with a glass tube and some steel wool wrapped around the bottom of the tube and the tube attached to a diaphragm. Also a little pan of cold water jackets the top region for cooling. For some reason it brought to mind my snorkelers, for it breathes in and out eve...
by Mark
Sat Apr 01, 2023 2:56 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

It seemed like there was an outside chance I might have been heating this a little too much. It's a lot of mass slinging up and down being held with two magnets and a stretch press-fit wobbly drill dust catcher bellows. Living on the edge. ha Pressure Loss on a Stirling Hot Air Jumper https://youtu....
by Mark
Fri Mar 24, 2023 9:12 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

Martini Glass Stirling Hot Air Jumper
https://youtu.be/7UkkXHwxR9Q

And a bit faster.
https://youtu.be/PA0hhiqEhFg
by Mark
Sun Mar 12, 2023 1:46 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

This is a toothbrush holder I bought long ago thinking it might be useful for a jam jar jet or something but instead this simple three piece engine made by adding a silicone jar lid and some steel wool.
https://youtu.be/qn9DUPrqUVw
by Mark
Thu Mar 09, 2023 10:23 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

Another odd thing to use to make a jumper.
Stirling Hot Air Jumper with Sippy Cup Lid
https://youtu.be/SbBvBssQw8M
by Mark
Sat Feb 25, 2023 6:05 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

A silicone condiment container jumper or making things with odd things.
https://youtu.be/b1KA3NQcQYg
https://youtu.be/WnteuWwNKAw
by Mark
Tue Feb 21, 2023 3:24 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

A fast one. At the 1:14 mark it appears stretched and frozen for a few seconds.
Speed Test of a Stirling Engine Hot Air Jumper
https://youtu.be/ciHfynKzFE0
by Mark
Sat Feb 18, 2023 5:01 am
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1850
Views: 812633

Re: Odds and ends

Another jumper that was minimalistic.

Easy Balloon Three Piece Stirling Hot Air Jumper
https://youtu.be/B547cKwERzI