LBMEFM
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| posted on 4/12/11 at 07:33 AM |
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Optics
Sitting in the pub the other night, as you do, I looked at an optic on the vodka bottle. Each dispence has to be accurate, the optic itself is a very
complex shape, it's round has tapered sides and the mechanics of the valve are internal affecting the volumne. The question is how did they
calculate the internal size to dispense the exact volume, by trial and error or by maths, or maybe do you think I should get more friends to drink
with? 
[Edited on 4/12/11 by LBMEFM]
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stevegough
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| posted on 4/12/11 at 07:37 AM |
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What's the meaning of life?
Luego Locost C20XE.
Build start: October 6th 2008.
IVA passed Jan 28th 2011.
First drive Feb 10th 2011.
First show: Stoneleigh 1st/2nd May 2011.
'Used up' first engine may 3rd 2011!
Back on the road with 2nd engine may 24th
First PASA mad drive 26/7/11
Sold to Mike in Methyr Tydvil 19/03/14
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liam.mccaffrey
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| posted on 4/12/11 at 07:51 AM |
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almost certainly designed using 3d CAD in which case its a doddle.
Probably possible to do it with maths too if you're smart, integrating revolving sections etc
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snapper
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| posted on 4/12/11 at 08:02 AM |
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I would think the dispensing valve system came first then different shaped optics are easy to calculate using simple maths.
Valve system volume + dispensing volume = optic volume.
Archimedes principle to calculate valve volume
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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Steve Hignett
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| posted on 4/12/11 at 09:45 AM |
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Didn't they use to be a straight sided conical shape? In which case, it's simple maths, and then when 3D cad came along as above etc...
And before anyone mentions how old am I to remember it, well I'm only 35...
It's just that I've been on the spirits since I was 4 
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plentywahalla
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| posted on 4/12/11 at 02:44 PM |
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I think we attribute too much intelligence to CAD systems (having run one professionally for many years) They cannot allow for variable shrinkage and
distortion due the moulding process.
I suspect the real answer is there is a wide range of adjustment in the valve system, they design it 'about right' and calibrate it
afterwards. Simples
Rules are for the guidance of wise men ... and the obedience of fools. (anon)
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bi22le
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| posted on 4/12/11 at 03:00 PM |
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If i was designing one i would concentrate on getting an erganomic reliable tap. this incorporates a backing plate.
its then a simple case of getting the front optic the right volume to produce 50ml. if the valve robs the volume little then so be it. it makes the
drunk guy at the bar think he is getting more for his money although he is obviously not!!
Sounds like you have the same conversations as me and my sad mates!!
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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Confused but excited.
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| posted on 4/12/11 at 03:27 PM |
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quote:
Originally posted by plentywahalla
I suspect the real answer is there is a wide range of adjustment in the valve system, they design it 'about right' and calibrate it
afterwards. Simples
+1. That's how all the industrial liquid fill systems that I have worked on are designed.
Tell them about the bent treacle edges!
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owelly
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| posted on 4/12/11 at 04:21 PM |
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And I bet you read the beer mats too.......
http://www.ppcmag.co.uk
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mrwibble
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| posted on 4/12/11 at 04:32 PM |
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i wonder why they are called optics? haven't anything optical about them really, apart from you can see the liquid inside, possibly not always?
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Krismc
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| posted on 4/12/11 at 05:05 PM |
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Probably called optics, because they are designed so that you and the bar person can see them? Simples. and also simples how they designed them with
simple maths, then made cheaply as most are plastic then adjusted back into line until exact.
Built, Ivaed, Drove and now Sold - 2011 MNR VORTX RT+ 2000cc Zetec on R1 Throttle boddies.
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