https://www.youtube.com/watch?v=orx49fCw1lk
--
Rich
https://www.youtube.com/watch?v=orx49fCw1lk
On Sunday, December 10, 2023 at 7:32:01 PM UTC-6, RichD wrote:
https://www.youtube.com/watch?v=orx49fCw1lk
--
Rich
You can get one for about 30 bucks and take it apart. Then you can explain = >it to yourself
and others. Called Wonder Sphere.
--
Rich
On December 11, Martin Brown wrote:
https://www.youtube.com/watch?v=orx49fCw1lk
Simple enough. It is a gyro stabilised fan and it will fly horizontally
in roughly the direction that you lean it towards. Quite ingenious.
It looks like a single propeller. How does it perform tricks in
3 dimensions? The gyro is a separate device, which directs the
tilt, something like that?
The propeller itself is also a gyro, which complicates things.
On 13/12/2023 00:13, RichD wrote:
On December 11, Martin Brown wrote:
https://www.youtube.com/watch?v=orx49fCw1lk
Simple enough. It is a gyro stabilised fan and it will fly horizontally
in roughly the direction that you lean it towards. Quite ingenious.
It looks like a single propeller. How does it perform tricks in
3 dimensions? The gyro is a separate device, which directs the
tilt, something like that?
No it is all one thing - except that there is a circular bar inside the
frame that spins up with the fan and is probably where most of the gyro effect comes from. The whole spinning part provides gyro stabilisation
and the angle you set it off from determines the trajectory.
The propeller itself is also a gyro, which complicates things.
Not really it is one distributed mass gyro but the gyro contribution is dominated by the parts that are furthest from the axis of rotation
whilst the lift is mainly generated by the fan. There is also a little
bit of lift from the spinning ball effect so beloved of cricketers.
https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/ideal-lift-of-a-spinning-ball/
On 13/12/2023 13:25, Martin Brown wrote:
On 13/12/2023 00:13, RichD wrote:
On December 11, Martin Brown wrote:
https://www.youtube.com/watch?v=orx49fCw1lk
Simple enough. It is a gyro stabilised fan and it will fly horizontally >>>> in roughly the direction that you lean it towards. Quite ingenious.
It looks like a single propeller. How does it perform tricks in
3 dimensions? The gyro is a separate device, which directs the
tilt, something like that?
No it is all one thing - except that there is a circular bar inside
the frame that spins up with the fan and is probably where most of the
gyro effect comes from. The whole spinning part provides gyro
stabilisation and the angle you set it off from determines the
trajectory.
The propeller itself is also a gyro, which complicates things.
Not really it is one distributed mass gyro but the gyro contribution
is dominated by the parts that are furthest from the axis of rotation
whilst the lift is mainly generated by the fan. There is also a little
bit of lift from the spinning ball effect so beloved of cricketers.
https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/ideal-lift-of-a-spinning-ball/
And worth adding that it relies on the inertia of the frame to give it a
few seconds of lift before the frame starts rotating and effectively
slowing down the fan.
On 13/12/2023 16:07, Clive Arthur wrote:
On 13/12/2023 13:25, Martin Brown wrote:
On 13/12/2023 00:13, RichD wrote:
On December 11, Martin Brown wrote:
https://www.youtube.com/watch?v=orx49fCw1lk
Simple enough. It is a gyro stabilised fan and it will fly horizontally >>>>> in roughly the direction that you lean it towards. Quite ingenious.
It looks like a single propeller. How does it perform tricks in
3 dimensions? The gyro is a separate device, which directs the
tilt, something like that?
No it is all one thing - except that there is a circular bar inside
the frame that spins up with the fan and is probably where most of the
gyro effect comes from. The whole spinning part provides gyro
stabilisation and the angle you set it off from determines the
trajectory.
The propeller itself is also a gyro, which complicates things.
Not really it is one distributed mass gyro but the gyro contribution
is dominated by the parts that are furthest from the axis of rotation
whilst the lift is mainly generated by the fan. There is also a little
bit of lift from the spinning ball effect so beloved of cricketers.
https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/ideal-lift-of-a-spinning-ball/
And worth adding that it relies on the inertia of the frame to give it a
few seconds of lift before the frame starts rotating and effectively
slowing down the fan.
It is still a cute physics toy - I want one!
On December 11, John Smiht wrote:
https://www.youtube.com/watch?v=orx49fCw1lk
You can get one for about 30 bucks and take it apart. Then you can explain it to yourself
and others. Called Wonder Sphere.
I'm not sure about that - I recall as a youngun, taking apart a coffee >percolator, remember those? >https://th.bing.com/th/id/OIP.32COhd4K0iOkWcR4YXzT-AHaJJ
What the hey, just a tube and a basket, how does this thing work?
It violates the laws of chemistry!
So you see, reverse engineering doesn't always go as planned -
PS I have a little quiz of science, math, and economics, which I
spring on unsuspecting victims. This percolator is one. No one
has yet answered correctly. Either they claim it's magic, or guess
the water boils and bubbles up the tube.
On Thu, 21 Dec 2023 15:50:20 -0800 (PST), RichD
<r_delaney2001@yahoo.com> wrote:
On December 11, John Smiht wrote:
https://www.youtube.com/watch?v=orx49fCw1lk
You can get one for about 30 bucks and take it apart. Then you can explain it to yourself
and others. Called Wonder Sphere.
I'm not sure about that - I recall as a youngun, taking apart a coffee >>percolator, remember those? >>https://th.bing.com/th/id/OIP.32COhd4K0iOkWcR4YXzT-AHaJJ
What the hey, just a tube and a basket, how does this thing work?
It violates the laws of chemistry!
So you see, reverse engineering doesn't always go as planned -
PS I have a little quiz of science, math, and economics, which I
spring on unsuspecting victims. This percolator is one. No one
has yet answered correctly. Either they claim it's magic, or guess
the water boils and bubbles up the tube.
.<https://en.wikipedia.org/wiki/Thermosiphon>
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