On Sat, 6 Jul 2019 at 12:26, Philip Barnes <[email protected]> wrote:
> Unladen is certainly the used, and understood, way of expressing such > restrictions in the UK. > > https://www.gov.uk/vehicle-weights-explained > > Off topic, and not your fault, but that is an explanation that isn't entirely free from ambiguity and illogic. The unladen weight excludes passengers but includes items needed for ordinary operation. Is the driver a passenger or an item needed for ordinary operation? Or both? Or neither? It doesn't include the weight of batteries in an electric vehicle. I can understand excluding fuel, since a petrol/diesel/hydrogen vehicle may be operated with a tank that's nearly empty but batteries are a dead weight as much as the chassis is. What would be far more sensible and consistent with the exclusion of fuel would be to include the batteries (items needed for ordinary operation) but to exclude the almost infinitesimally-small extra mass created by charging the batteries (subtle point of physics: energy, of any kind, has mass). The law is an ass. A simplified explanation of the law is a bigger ass. -- Paul
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