Worzey
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| posted on 24/5/09 at 11:09 AM |
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Weighbridge results
Just popped to the local weighbridge (Handcross Hill A23) to see the efforts of my expensive weight saving programme.
Last time I was there I got a weight of 615kgs - much too heavy!!!!
Since then I've done the following work:
* Willwood Calipers/Discs at the front
* Lighter discs at the back
* New Team dynamics wheels with R888's
* GRP seats - replaced the Cobras
* Oddysey PC525 lightweight battery
* Lightweight flywheel
* Other weight saving work c10kgs lost
* Helium in the tyres 
And the new weight...........
615kgs !!! Doh!
I'm guessing the Weighbridge is out as I think I've lost close to 30kgs-40kgs.
How accurate are these public weighbridges?
Caterham R400
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delboy
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| posted on 24/5/09 at 11:11 AM |
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Our local one is plus or minus 20kg, if you were close to the top of the next step up before, you could be close to the next step down this time which
would explain the no change result you got.
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prawnabie
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| posted on 24/5/09 at 11:13 AM |
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Bear in mind that the tolerance is given at a set weight - usually between 2 and 3 tonnes (not tons).
Weighbridges (well the ones i have worked on in the past) are notoriously inacurate at less than a tonne.
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smart51
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| posted on 24/5/09 at 02:54 PM |
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Weighbridges for weighing lorries are expected to weigh 44 tonnes, plus a bit more, say 50 tonnes.
A commercial grade weighing scale is often rated at 5000 divisions, so 10kg steps in 50 tonnes. Depending on the grade of the equipment, linearity
and error may be quoted at +/- 2 divisions or so. Avery quoted 1 division for their retail scales when I was there, others applications may well be
more. Remember that scales drift and are recalibrated at intervals so it may well be that the same item may read a few divisions differently before
and after calibration.
Also its true, scales don't read too well at the bottom end of their range. Use a scale that is sized for your application.
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prawnabie
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| posted on 24/5/09 at 03:03 PM |
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Thats a bit more heavy gauge than I used to work on lol! Think the max i saw was on an aggregates quarry which never saw more than 10 tonne!
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stevegough
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| posted on 24/5/09 at 03:08 PM |
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maybe first time you had a full tank and a boot full of shopping? And you were sat in it! 
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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marcjagman
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| posted on 24/5/09 at 03:47 PM |
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Try a local scrap metal merchant, the weigh bridges there are usually very accurate
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