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This is the world largest Foucault Pendulum housed in the Oregon Convention Center in Portland Oregon.
Strobist: 1 tungsten bulb right of and behind camera. I SB800 flash behind subject, camera left set at 1/128 in stroboscopic mode for 20 flashes at 20hz, triggered by PC cord to camera. Second SB800 flash behind subject camera right also set at 1/128 power fired by built in slave. Pendulum was set up to have a period of approximately 2 seconds; each swing took about 1 second (A seconds pendulum.) 1 second shutter speed. I tripped the shutter as the pendulum reached its farthest leftward movement.
I was inspired by Dr Shutter to try out long exposures with a simple pendulum. It was surprisingly easy to get going, of course it will take time to master as always :)
Photo: Thomas Ohlsson Photography
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light | dark | expired agfacolor 200-n
The 2010 Traveling Panoramic Camera Adventure
A panorama camera was shared among 16 photographers throughout the USA and the UK and the resulting images and experiences are being shared on the long square project flickr group.
Specs for the camera are:
28mm fixed two element lens
1/125 shutter f/11
13 x 36 mm panorama mask
My fellow adventurers are:
Andy Schmitt NJ
Brian Krummel PA
Peter Schafer WV
Meredith Shinko Ensell OH
Angie Harris OH
David Lindley OH
Bill Bressler MI
Karen Taylor TX
Warren Harold TX
Randy Ray Cathey TX
Robert Williams NM
Steve Welch NM
Ariel Boston NM
Phil Bebbington UK
Shari Baker UK
Foucault Pendulum
The Foucault Pendulum was conceived by Léon Foucault in the middle of the 19th century, with the goal of proving Earth's rotation through the effect of the Coriolis Force. In essence, the Foucault Pendulum is a Pendulum with a long enough damping rate such that the precession of its plane of oscillations can be observed after typically an hour or more. A whole revolution of the plane of oscillation takes anywhere between a day if it is at the pole, or longer at lower latitudes. At the equator the plane of oscillation does not rotate at all. (Note that if a precession period is defined as a rotation of 180° of the plane of oscillation, then the period at the pole is 12 hrs).
"Politics is a pendulum whose swings between anarchy and tyranny are fueled by perpetually rejuvenated illusions." - Albert Einstein
Ihagee Exakta VX
Carl Zeiss f/3.5 50mm Tessar lens
Ilford HP5+ film
Kodak HC-11 developer (Ditlution B - 5 min. @68F/20C)
Digitally scanned from negative
When I was exploring the former Bega Valley fleet midway last year, part of the exploring involved climbing all over the trucks. I took a number of hopper pictures with the group of the side loaders as it started to get dark and came out with some successful shots, this one being the best and sharpest. What we’re looking down on in this snap is what’s known as the pendulum packer, which is a popular find in side loaders and is interestingly found in a particular FL body built in Europe.
This design simply swings up and down to receive and pack material. It is seen in the close to fully extended position as if it was pushing garbage through the body; once pulled back it allows material to fall down into the path of the blade for the next sweep. One side of the pendulum features a blunt edge which enables the mechanism to move under garbage waiting to be packed while retracting. The other side of the pendulum features a flat rectangular face which makes contact with the material during the downswing to feed the garbage. The packer blade itself is supported by two hinged “arms” which are part seen hanging out the bottom of the steel plates on both the left and right of the picture. Twin hydraulic cylinders on each side of the hopper provide power to these arms, retracting to pull the pendulum upwards and extending to let the pendulum swing down and feed the garbage.
A height gaining pendulum for Gravitrax marble runs built with Lego Technic parts.
My son and I, we love Gravitrax. It's like a system of building bricks for marble runs. And just like with Lego you can add more and more parts to be able to build bigger projects.
But sometimes you really reach limits. The biggest challenge is that for a long run of the marble you need to gain height from time to time. There are extensions to gain height, but with most of them the marble will only gain the height of 3 to 5 "bricks", which is not much.
One solution are "custom" electrical lifts, most of them built with 3D printed parts. A rather simple solution are pendulums activated by a marble on a lower level starting another marble on a higher level. Most of these are also built with 3D printed parts.
But not everyone has a 3D printer at home, but as a "brickhead" I have Lego Technic :-)). So I started looking for solutions to combine Lego with Gravitrax.
Well, it works, so I was able to build this.
it seems that part of the wisdom of age is knowing when to step back and let the next generations lead.
at a certain point it becomes necessary to allow youth to define the path forward and to follow them, having yourself cut a path for them to follow for many years. it is a pendulum that swings with a natural rhythm, but when one generation defies its role either by refusing to step away or refusing to step up, the dance is disrupted.
also, big stinking college kids are great for blocking the wind and sunlight.
Lately I've been reading and watching lots of Horror stories and movies.
Stay tuned for the aftermath.
A Marsh Wren perched on a reed sings, while the gentle breeze sways his perch back and forth like a pendulum; Torres Martinez Wetlands, CA.
Knitting Pendulum in front of the tree--probably our last night with the tree. It'll be taken down tomorrow.
Jatim Park I, Malang Indonesia
Awalnya penasaran pengin nyoba wahana ini. ku ikut ngantri masuk. lha kok saat mo naik, ada perasaan takut, apalagi lihat expresi beberapa orang yang habis naik ini terlihat pucat gimana gitu. mo balik ke belakang, kok yo gengsi. akhirnya kuberanikan diri naik wahana ini. awal berputar halus, terasa enjoy. selanjutnya mulai diayun dan diputar, masih enjoy dan menyenangkan. semakin cepat berputar dan berayun, mulai terasa jantung mak plas, sampai puncaknya badan dijungkir di atas, diputar 360 derajat vertikal plus berputar 360 derajat dari lengan wahana ini. benar-benar dah.. perut diaduk dan jantung mo copot.
wis.. kapok naik ini aku... ^_^
Bagi yang ada kelainan jantung, vertigo, tensi gak normal, dihimbau untuk tidak mencoba wahana ini (begitu tulisan yang tertera di depan pintu masuk wahana)
The mirror underneath the Pendulum has been added since my last visit - which, admittedly, was quite a while ago.
A snail having a wander on (in) a snowdrop. Reminds me of the inner workings of a clock of some reason.
Two water columns rising to meet in the middle to form a frame that supports the hanging yellow pendulum.