Search found 10941 matches
- Sat May 11, 2024 2:53 pm
- Forum: Tools and Construction
- Topic: Crack of the Snorkelers
- Replies: 41
- Views: 33513
Re: Crack of the Snorkelers
Another variation that might be fun to try instead of the dividing wall down the center of a snorkel is a slightly smaller diameter tube sleeved inside the larger. I wonder if the candle experiment would work with a tube within a tube, to convect air down to sustain a candle flame? In some Squid st...
- Mon Apr 22, 2024 4:17 am
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
I wonder if a circular tube with intermediately spaced holes could work/sustain? Bizarre traveling flame discovery https://www.youtube.com/watch?v=SqhXQUzVMlQ Viewer comments .. "You just figured out a phenomenon, that I think is being developed right now in rocket engines. I got a friend in enginee...
- Thu Apr 11, 2024 3:14 am
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
I liked the reversing egg effect, first a vacuum and then pressure which made the egg to change directions.
Egg in the Bottle, Several Variations to Try
https://www.youtube.com/watch?v=dkPRx2Qmjsg
Egg in the Bottle, Several Variations to Try
https://www.youtube.com/watch?v=dkPRx2Qmjsg
- Thu Mar 14, 2024 1:49 am
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
Airborne 03.13.24: We Fly Deltahawk!, Kite Magnetics eTrainer, Pulsejet!
https://www.youtube.com/watch?v=Aoj61D06MGU&t=567s
https://wave-engine.com/
https://www.youtube.com/watch?v=Aoj61D06MGU&t=567s
https://wave-engine.com/
- Thu Mar 07, 2024 3:42 pm
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
Quite a bit of spring energy as it jumps out of the beaker Thick nitinol wire tossed in hot water, breaks glass beaker. https://www.youtube.com/watch?v=MuhwiPzlcCw I just tried the above demo with 1mm thick nitinol wire,1 meter long wound into a ~3/4 inch diameter spring about 2 inches long and dro...
- Sun Mar 03, 2024 7:14 pm
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
"Oh, that's really weird ... Can you hear that?"
How NASA Reinvented the Wheel
https://www.youtube.com/watch?v=vSNtifE0Z2Q&t=900s
How NASA Reinvented the Wheel
https://www.youtube.com/watch?v=vSNtifE0Z2Q&t=900s
- Sun Mar 03, 2024 7:14 pm
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
"Oh, that's really weird ... Can you hear that?"
How NASA Reinvented the Wheel
https://www.youtube.com/watch?v=vSNtifE0Z2Q&t=900s
How NASA Reinvented the Wheel
https://www.youtube.com/watch?v=vSNtifE0Z2Q&t=900s
- Thu Feb 29, 2024 1:44 pm
- Forum: Ramjet forum
- Topic: Ryan's Marquardt Firebrand drone
- Replies: 1
- Views: 429
Re: Ryan's Marquardt Firebrand drone
Firebrand Anti-ship Missile
https://www.youtube.com/watch?v=cxvNoCsALEk
https://www.youtube.com/watch?v=cxvNoCsALEk
- Sun Feb 25, 2024 5:01 pm
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
Quite a bit of spring energy as it jumps out of the beaker
Thick nitinol wire tossed in hot water, breaks glass beaker.
https://www.youtube.com/watch?v=MuhwiPzlcCw
Thick nitinol wire tossed in hot water, breaks glass beaker.
https://www.youtube.com/watch?v=MuhwiPzlcCw
- Sat Feb 24, 2024 3:58 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 828233
Re: Odds and ends
Some out of focus perspective showing the angle and movement of the rolling with a fixed point. The other day it ran for almost 9 minutes and could do better if it had a flat even surface for it to roll over.
Wheel Motor Pivoting on a Point
https://www.youtube.com/watch?v=9DG4FdhXGJw
Wheel Motor Pivoting on a Point
https://www.youtube.com/watch?v=9DG4FdhXGJw
- Fri Feb 23, 2024 3:45 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 828233
Re: Odds and ends
My little rolling wheel motor towel bar posts are made of chrome-plated brass. So I wonder how a nitinol wheel would perform. From Wikipedia "The discovery of the shape-memory effect in general dates back to 1932, when Swedish chemist Arne Ölander[6] first observed the property in gold–cadmium alloy...
- Thu Feb 22, 2024 7:59 pm
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550550
Re: youtube
Just a funny design Shape Memory Motor Prototype Test https://www.youtube.com/watch?v=JAbjJY-6Ts4&list=PLdlO2o-tWpQvdZPJMJ9E_7My_VDfgAy7W A faster one Very strong Nitinol Engine running on warm water and ice https://www.youtube.com/watch?v=sscoMtJV0uY&list=PLdlO2o-tWpQvdZPJMJ9E_7My_VDfgAy7W&index=3 ...
- Thu Feb 22, 2024 1:51 am
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 828233
Re: Odds and ends
Yes. I've bought several shapes myself because they just seemed like something potentially useful later on somehow. Here's yet another variation of the wheel motor. A center needle point stays fixed in one spot and the wheel tilts on the pivot point going in circles. I was thinking of trying a swash...
- Tue Feb 20, 2024 2:00 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 828233
Re: Odds and ends
I kind of like this twirling effect, like something you would spin on the tip of your finger with motion.
Compound Rocking Motion Using Two Cones
https://www.youtube.com/watch?v=Kk9-ocp1Nx4
Compound Rocking Motion Using Two Cones
https://www.youtube.com/watch?v=Kk9-ocp1Nx4
- Sat Feb 17, 2024 8:35 pm
- Forum: Off topic forum
- Topic: Left field
- Replies: 600
- Views: 226977
Re: Left field
I saw this exact desk model for sale on ebay today for $1800.00. https://chadslattery.com/X-Plane-Models/113 https://www.bonhams.com/auction/29359/lot/152/globe-aircraft-model-22-goblin-contractors-concept-model-mixed-material-on-wood-base-late-1940s-wingspan-7-14-inches-fuselage-8-34-inches-7-14-in...