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#46 phildunford

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Posted 06 May 2012 - 11:27 AM

http://www.youtube.com/watch?v=OWZE6g6Ytlw&feature=related
looks like its straight off a ufo never mind invented in 1902?


Used to have one in the Science Museum - In fact used to be the standard way of getting DC current from an AC supply! Happy days!
Teaching moft plainly, and withall moft exactly, the composing of all manner of fire-works for tryumph and recreation (John Bate 1635)
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#47 dr thrust

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Posted 30 May 2012 - 10:24 PM


the future of transport?

Edited by dr thrust, 11 September 2012 - 09:39 PM.


#48 Peret

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Posted 02 June 2012 - 05:19 AM

Used to have one in the Science Museum - In fact used to be the standard way of getting DC current from an AC supply! Happy days!

I remember that rectifier in the Science Museum from when I was about 8. It was my favourite exhibit, I'd stand there pressing the button over and over. Later I saw a big bank of them in action at one of the substations on the Southern Railway, which ran on 600VDC. Each one must have had 20 pounds of mercury in it - one pound of Hg is a little less volume than a golf ball.

Somehow, solid state rectifiers and thyristor banks don't have the same appeal.

#49 cooperman435

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Posted 02 June 2012 - 08:15 AM

Makes my Dewalt radio in the workshop a bit low effort now :-(

#50 dr thrust

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Posted 25 June 2012 - 10:46 PM

dam those pesky clever germans


Edited by dr thrust, 01 July 2015 - 06:14 PM.


#51 barnsley-mark

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Posted 26 June 2012 - 06:16 AM

Interesting film, I didn't realise the v2 was so big. Also really down to earth (no punning intended) engineering and construction.

#52 Bob Twells

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Posted 03 July 2012 - 11:05 AM

Fireworks from above:


#53 barnsley-mark

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Posted 04 July 2012 - 06:10 AM

I was thinking some of the rockets were getting close - interesting view point regarding bursts - so different when they are falling away.

#54 phildunford

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Posted 04 July 2012 - 11:42 AM



Here's a mercury arc rectifier that I think is still in use...
Teaching moft plainly, and withall moft exactly, the composing of all manner of fire-works for tryumph and recreation (John Bate 1635)
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#55 Bob Twells

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Posted 05 July 2012 - 12:47 PM

Fireworks animation:


#56 phildunford

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Posted 05 July 2012 - 09:25 PM

http://www.youtube.com/watch?v=jJXVx9RHAfQ&feature=related really enjoyed this one



Genius!
Teaching moft plainly, and withall moft exactly, the composing of all manner of fire-works for tryumph and recreation (John Bate 1635)
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#57 dr thrust

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Posted 11 August 2012 - 11:01 PM

got any spare mortar tubes...? [img]http://www.pyrosocie...ult/sleep.gif[/

Edited by dr thrust, 01 July 2015 - 06:48 PM.


#58 barnsley-mark

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Posted 12 August 2012 - 05:54 AM

1341523510[/url]' post='77069']
Genius!


They are amazing :)

#59 dr thrust

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Posted 25 August 2012 - 04:18 PM

An interesting video on ball milling http://m.youtube.com...h?v=O2-gg0C2Asw
Best turn the volume down though lol

Edited by dr thrust, 25 August 2012 - 04:19 PM.


#60 Vic

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Posted 22 December 2012 - 04:44 PM

How to make some kindling firewood with black powder.

Splitting Wood with Black Powder


Freud. Artists, in this view, are people who may avoid neurosis and perversion by sublimating their impulses in their work.




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