https://www.youtube.com/watch?v=orx49fCw1lk

--
Rich

On 11/12/2023 01:31, RichD wrote:
> https://www.youtube.com/watch?v=orx49fCw1lk
>
> --
> Rich

Gyroscope combined with a fan/rotor?

--
Cheers
Clive

On 11/12/2023 01:31, RichD 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.

Not unlike a model autogyro.

--
Martin Brown

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.

On Sunday, December 10, 2023 at 5:32:01 PM UTC-8, RichD wrote:
> https://www.youtube.com/watch?v=orx49fCw1lk

It's a cute special effect.
A longer treatment than the youtube, is a character in Vesper

<https://www.imdb.com/title/tt20225374/>

which is analyzed on the 'extras' of the DVD release

On a sunny day (Mon, 11 Dec 2023 10:44:21 -0800 (PST)) it happened John Smiht
<utube.jocjo@xoxy.net> wrote in
<d31cfb0b-6b9b-4c0d-b454-02a1df68a9e3n@googlegroups.com>:

>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.

Is this < 5 dollar ball the same thing?
ebay.com/itm/235266308381
free shipping!

In message <0f4c25de-5d83-43f3-97b0-006a09cb0d63n@googlegroups.com>,
RichD <r_delaney2001@yahoo.com> writes
>https://www.youtube.com/watch?v=orx49fCw1lk
>
>--
>Rich

The Galaspheres featured in Space Patrol operate on this principle .
They use Yobba Rays to achieve escape velocity.

Https://www.youtube.com/watch?v=HX1l7J2OMGU

Brian

--
Brian Howie

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.

--
Rich

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/

--
Martin Brown

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.

--
Cheers
Clive

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!

--
Martin Brown

On a sunny day (Thu, 14 Dec 2023 11:00:03 +0000) it happened Martin Brown
<'''newspam'''@nonad.co.uk> wrote in <ulen7s$1bn2e$1@dont-email.me>:

>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!

I already ordered one from ebay
Has been shipped, expected arrival end of January.

Now as to what will fly on it and what will control it
https://panteltje.online/panteltje/quadcopter/index.html

I seem to also have the domain panteltje.online these days...
That distances me from .nl politics supporting israeli genocide on Palestinian

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.

--
Rich

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>

Joe

On a sunny day (Thu, 21 Dec 2023 20:07:17 -0500) it happened Joe Gwinn
<joegwinn@comcast.net> wrote in <89o9oip1empu30inmjqarfotitc2oi6pcv@4ax.com>:

>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>
>

Yesterday my magic ball arrived :-)
Been playing with it, has VERY bright LEDs, needs sunglasses ..
and outside a heavy storm with rain and hail,
Anyways had it floating above my hand, comes back too if you throw it the right way..
but will try later outside when weather improves as there is too much - like monitor screens - here that can be damaged
if something goes wrong.
Fun toy