
Originally Posted by
mr_squiggle
Some of the weights are calculated & some were directly measured in a weighbridge, so I expected some measurement & rounding errors. Weighbridges like to have an even load & I put the front axle on one end only. Granted, a proper set of axle scales would be the most accurate but I was checking car & van GCM, van ATM etc. I'm happy for an error of ~60kg on 2940kg, it's a shade over 2%.
Here's what was weighed & in what order:
Front axle
Disco & van (hitched)
Rear axle & van (hitched)
Van only (hitched)
Van unhitched
Old mate on the bridge recorded the results & did the calcs.
The vehicle weighed 3000kg on its own (calculated from Disco & van minus van (unhitched)). I've seen it on a couple of dump weighbridges with an empty light box trailer at about 3.2t so it makes sense.
Is that a bit clearer?
So, the car weighs 2940kg with 340kg draw bar load included and 3000kg with no drawer bar load, assuming the front axle was weighed with the caravan attached (which you didn't specify). If the front axle was weighed with the van unhitched it will be reduced by a hundred kg or more with the van hitched, which makes the discrepancy even greater than the 400kg above. Do you see the problem? At best the car should weigh 3340kg with a 340kg draw bar load added to the unhitched weight of 3000kg.
I think the 3000kg includes the trailer tow bar weight and is not the weight of the car alone. Otherwise your car is way over weight if the 340kg draw bar load is added to the unhitched car weight.
My point was not that the 3000kg is too light but that the sum of the axles is way too light if the 3000kg does not include the draw bar weight.
Bob
2010 D4 3.0TDV6 SE, ediff, LLAMS, 5 x GOE wheels, LT285/60R18 BFG K02's, GOE Compressor Guard, LR Tank, Mitch Hitch, ECB Bull Bar, Kaymar Rear Bar, Traxide, Safari Snorkel.
2019 Discovery 5 SD6 SE, 20 inch wheels, 275/55R20 Nitto Grappler G2 tyres
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