On Sunday, December 10, 2023 at 5:32:01 PM UTC-8, RichD wrote:> https://www.youtube.com/watch?v=orx49fCw1lkIt'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
explain the physics
Started by ●December 10, 2023
Reply by ●December 11, 20232023-12-11
Reply by ●December 12, 20232023-12-12
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!
Reply by ●December 12, 20232023-12-12
In message <0f4c25de-5d83-43f3-97b0-006a09cb0d63n@googlegroups.com>, RichD <r_delaney2001@yahoo.com> writes>https://www.youtube.com/watch?v=orx49fCw1lk > >-- >RichThe 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
Reply by ●December 12, 20232023-12-12
The arsehole Jan Panteltje <alien@comet.invalid> persisting in being an Off-topic troll... -- Jan Panteltje <alien@comet.invalid> wrote:> Path: not-for-mail > From: Jan Panteltje <alien@comet.invalid> > Newsgroups: sci.electronics.design > Subject: Re: explain the physics > Date: Tue, 12 Dec 2023 06:15:40 GMT > Message-ID: <ul8tqg$2lq51$1@solani.org> > References: <0f4c25de-5d83-43f3-97b0-006a09cb0d63n@googlegroups.com> <d31cfb0b-6b9b-4c0d-b454-02a1df68a9e3n@googlegroups.com> > MIME-Version: 1.0 > Content-Type: text/plain; ISO-8859-15 > Content-Transfer-Encoding: 8bit > Injection-Date: Tue, 12 Dec 2023 06:15:44 -0000 (UTC) > Injection-Info: solani.org; > logging-data="2812065"; mail-complaints-to="abuse@news.solani.org" > User-Agent: NewsFleX-1.5.7.5 (Linux-5.15.32-v7l+) > Cancel-Lock: sha1:GRtdvZdz3iUEoEwg+UE8wwzh3Ck= > X-Newsreader-location: NewsFleX-1.5.7.5 (c) 'LIGHTSPEED' off line news reader for the Linux platform > NewsFleX homepage: http://www.panteltje.nl/panteltje/newsflex/ and ftp download ftp://sunsite.unc.edu/pub/linux/system/news/readers/ > X-User-ID: eJwNwokRACEIBLCW5GR5yllB+i/BywTbxMrVYIrBJM/RqKhFnbz/sxmjLTLE9Pi3r7llm6NXBRWR7i30ZOcDgDMWTQ== > X-Received-Bytes: 1764
Reply by ●December 12, 20232023-12-12
The idiot brian <nospam@b-howie.co.uk> persisting in being an Off-topic troll... -- brian <nospam@b-howie.co.uk> wrote:> Path: not-for-mail > From: brian <nospam@b-howie.co.uk> > Newsgroups: sci.electronics.design > Subject: Re: explain the physics > Date: Tue, 12 Dec 2023 06:58:41 +0000 > Organization: A noiseless patient Spider > Lines: 18 > Message-ID: <$eN+1gchSAelFwY5@b-howie.co.uk> > References: <0f4c25de-5d83-43f3-97b0-006a09cb0d63n@googlegroups.com> > Reply-To: brian <brian@b-howie.co.uk> > MIME-Version: 1.0 > Content-Type: text/plain;charset=us-ascii;format=flowed > Injection-Info: dont-email.me; posting-host="02140a24b318960d1e1149f1cf59b69c"; > logging-data="3761441"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+YqkZqvlMhBa7vsVfehPI9" > User-Agent: Turnpike/6.07-S (<PybO58XuML+lvra4hgthryAFd8>) > Cancel-Lock: sha1:61XqkNgyhYvPd3JXZIPwq2tnZbg= > X-Received-Bytes: 1452
Reply by ●December 12, 20232023-12-12
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
Reply by ●December 12, 20232023-12-12
The arsehole RichD <r_delaney2001@yahoo.com> persisting in being an Off-topic troll... -- RichD <r_delaney2001@yahoo.com> wrote:> X-Received: by 2002:ad4:42ae:0:b0:67e:f4a7:3be4 with SMTP id e14-20020ad442ae000000b0067ef4a73be4mr3185qvr.0.1702426428904; > Tue, 12 Dec 2023 16:13:48 -0800 (PST) > X-Received: by 2002:a05:6870:c107:b0:1fb:1e9d:ad6 with SMTP id > f7-20020a056870c10700b001fb1e9d0ad6mr7240213oad.5.1702426428509; Tue, 12 Dec > 2023 16:13:48 -0800 (PST) > Path: not-for-mail > Newsgroups: sci.electronics.design > Date: Tue, 12 Dec 2023 16:13:48 -0800 (PST) > In-Reply-To: <ul6umo$35d78$1@dont-email.me> > Injection-Info: google-groups.googlegroups.com; posting-host=199.33.32.40; posting-account=x2WXVAkAAACheXC-5ndnEdz_vL9CA75q > NNTP-Posting-Host: 199.33.32.40 > References: <0f4c25de-5d83-43f3-97b0-006a09cb0d63n@googlegroups.com> <ul6umo$35d78$1@dont-email.me> > User-Agent: G2/1.0 > MIME-Version: 1.0 > Message-ID: <76e06592-7230-4f37-8561-16177b093d9fn@googlegroups.com> > Subject: Re: explain the physics > From: RichD <r_delaney2001@yahoo.com> > Injection-Date: Wed, 13 Dec 2023 00:13:48 +0000 > Content-Type: text/plain; charset="UTF-8" > X-Received-Bytes: 1676
Reply by ●December 13, 20232023-12-13
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
Reply by ●December 13, 20232023-12-13
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
Reply by ●December 13, 20232023-12-13
The arsehole Martin Brown <'''newspam'''@nonad.co.uk> persisting in being an Off-topic troll... -- Martin Brown <'''newspam'''@nonad.co.uk> wrote:> Path: not-for-mail > From: Martin Brown <'''newspam'''@nonad.co.uk> > Newsgroups: sci.electronics.design > Subject: Re: explain the physics > Date: Wed, 13 Dec 2023 13:25:15 +0000 > Organization: A noiseless patient Spider > Lines: 28 > Message-ID: <ulcbbs$s9mp$1@dont-email.me> > References: <0f4c25de-5d83-43f3-97b0-006a09cb0d63n@googlegroups.com> > <ul6umo$35d78$1@dont-email.me> > <76e06592-7230-4f37-8561-16177b093d9fn@googlegroups.com> > MIME-Version: 1.0 > Content-Type: text/plain; charset=UTF-8; format=flowed > Content-Transfer-Encoding: 7bit > Injection-Date: Wed, 13 Dec 2023 13:25:16 -0000 (UTC) > Injection-Info: dont-email.me; posting-host="9c0d24e30e19a907897749f76dd5b50a"; > logging-data="927449"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18Wtv+o4E3xhxPrXFK1xguXqNWx3BPB0YP4wQKLeZCs+w==" > User-Agent: Mozilla Thunderbird > Cancel-Lock: sha1:ROvDW3auHd30me8/CYqyJ8h4ZFY= > Content-Language: en-GB > In-Reply-To: <76e06592-7230-4f37-8561-16177b093d9fn@googlegroups.com> > X-Received-Bytes: 2478
