Theme Day - Revolution - Luna Park

Down beside the north-western pylon of the Sydney Harbour Bridge, just to the rear of the North Sydney swimming pool I featured yesterday, is Sydney's Luna Park. I visited on Wednesday as yet another low was forming off the coast, sending squalls of scudding rain up the harbour, and turning our usual blue skies to a depressing shade of grey. However, the rain is welcome even though we have endured a lot of it during the month of April.

Luna Park is not open everyday. A sign said it would reopen at 11am on Friday. I suspect it is open Friday/Saturday/Sunday. But it is not locked up. I wandered freely. As you can see, the gondolas on the ferris wheel are enclosed. I suspect this is a government safety regulation. The ferris wheel was installed during the 1982 renovations, and stands 35 metres tall, with 24 gondolas. Now this is a midget of a wheel. Even the word's first wheel stood at 80m. (Chicago 1893). The London Eye was pretty tall at 135m. But, the world's tallest wheel is in Las Vegas, and is an astonishing 167.6m tall. The Ferris Wheel is named after its creator, George Washington Gale Ferris, Jr, who died of typhoid fever in 1896, aged 37.

As I was assembling this post, it occured to me that the arc of the bridge, in the back ground, is part of a (silent or understood) circle. The visible portion of the arc is 153m in length. I can think about radii, and about diameters, and about the circumference of any given circle; about tangents, and chords, and sectors. But, I have absolutely no idea how to calculate the radius of the circle of this arc, that being so, I will consider it "The Radii of the Silent Arc".

This is my contribution to the City Daily Photo Theme Day. Click here to see how other CDP bloggers have interpreted the theme, "Revolution". Thank you to Chrissy Brand from Mancunian Wave for devising May's theme of "Revolution".