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rattuscatchus

Engineering

Making A Ruby Laser – Part Five

25th September 2018 Doc Mike Finnley 0

Melting a hole through steel: The above image needs a little explanation! The Doc messed up his camera settings and under exposed the image. So I loaded it into Gimp and played with the curves [more…]

Engineering

Making A Ruby Laser – Part Three

14th August 2018 Doc Mike Finnley 0

More information on laser speckle can be found here:  Speckle pattern A Mirror Alignment Tool The most important part of constructing a ruby laser (or any laser with external mirrors) are getting the mirrors alligned [more…]

Dr Mike Finnley, Going Postal
Engineering

Making A Ruby Laser – Part Two

31st July 2018 Doc Mike Finnley 0

(a ruby rod lit by two bright blue LEDs. Due to the IR filter in my camera the pink colour is actually red. What you are seeing is the absorption of the blue light and the [more…]

Engineering

Making A Ruby Laser – Part One

21st July 2018 Doc Mike Finnley 0

Introduction For many years the Doc has had the desire to attempt the construction of a ruby laser. After six months of hard work, disappointment, late nights, lots of booze and a drained bank account [more…]

Authoritarianism

How I learned to despise the left and fear the bomb

12th April 2018 rattuscatchus 0

It was during an English lesson during the late 1970s – English lessons were never about spelling, grammar, creative writing, etymology, poetry or literature, always, always politics – when a short term supply teacher told [more…]

Christianity

Going to Church

28th January 2018 rattuscatchus 0

As a nipper, I was brought up in what was a fairly typical, English family. Mum, Dad, siblings and normal sorts of stuff. We were what I call typical Church of England. We all went [more…]

Rat Catcher, Going Postal
Arts

Review – Dunkirk, by Rat Catcher

8th August 2017 rattuscatchus 0

It was on Saturday that Mrs. Catcher and I took the train to the imax cinema to see Dunkirk. It is quite a journey so we made a night of it and came back the [more…]

Physics

An abridged history of the atomic model

19th June 2017 rattuscatchus 0

Towards the end of the 19th century, scientists were considering the structure of the atom. The atom was deemed  to be a tiny piece of matter which helped answer questions regarding spectroscopy. Spectroscopy being the  [more…]

Engineering

Development of the Merlin Engine

11th April 2017 rattuscatchus 0

The Rolls Royce Merlin was a V12, 27 litre engine and originally was a private venture so was financed entirely by Rolls Royce and its backers. Designated the PV12 it followed the Rolls Royce trend [more…]

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