MOT exempt

bigadaj

Manxman_in_exile wrote: »

I'm familiar with second power equating to area (eg pressure) and third power equating to volume (eg weight, mass x g) but what is the fourth power? Are we talking time?


I have looked at your link but it's not clear to me(?) where the fourth power comes from.

It's effectively time, and actually cyclical loading, so a non constant which is attempted to be replicated using the California bearing ratio test, with a result in percentage of a calibrated base load, in practice a single sized gravel sample loaded and subjected to the same number of cycles.

Richard53

Manxman_in_exile wrote: »

I'm familiar with second power equating to area (eg pressure) and third power equating to volume (eg weight, mass x g) but what is the fourth power? Are we talking time?


I have looked at your link but it's not clear to me(?) where the fourth power comes from.

You're confusing powers with dimensions. Yes, the fourth dimension is time, but that isn't what is being discussed.


The power of 2 (squared) is A x A
The power of 3 (cubed) is A x A x A
The power of four is A x A x A x A

Robisere

Don't know what most of the preceding has to do with the original question, but talking about 40 yo cars reminds me of the many cars I have owned. In the 70's and 80's I owned Capris, Cortinas and 2 Granadas. Each one was an excellent drive, with the virtue of being fairly simple for the ordinary motorist to service and maintain. That was because there was a limited number of parts and components which the ordinary motorist could not maintain and service, given a Haynes or workshop manual and enough of the relevant tools. Anything more complicated or heavy-duty, was brought to garages like the one in which I was workshop foreman.

Many of these 40 yo - and older - cars are now rebuilt, renewed and kept running by enthusiasts, and they require specialist insurance, which usually insures their OTR miles per year. Most Classic owners only use them in the warmer months anyway, storing them in the dry during winters. They are treated as valued possessions, washed, waxed heavily and continually checked for signs of wear and corrosion. There is a corresponding decrease in the annual amount of emissions, with of course an associated decrease in pollution.

These cars are totally divorced from the current wave of "Euro Boxes" which are stuffed with electronic gizmos and therefore exotic materials, which require dedicated Reclamation facilities to deal with them. Sadly, I drive such a vehicle, but really wish I had the time and money to buy and afford to run, a Classic.

iltisman

I sold my classic Mini to a lady in her 20s I had to explain what the choke did and when to use it. I doubt there is going to be a rush to buy old vehicles with their strange controls and requirement for constant maintenance .

oldagetraveller

iltisman wrote: »

I sold my classic Mini to a lady in her 20s I had to explain what the choke did and when to use it. I doubt there is going to be a rush to buy old vehicles with their strange controls and requirement for constant maintenance .

"Constant maintenance" no, just routine servicing at the specified time/mileage.
Granted that is less than a more modern car but at least it is possible to maintain/service properly on much older cars. e.g. an abundance of grease nipples to prolong the life of moving parts. There are even oil lubrication points on my classic's dynamo bearing and an oiling nipple onthe steering rack. Therefore less need of throwing components in the bin when they wear out (sealed for life:rotfl:).
A lot of components are also repairable or may be swapped out on a reconditioned exchange basis.
I would suggest that my 55 year old classic is in a far better mechanical and roadworthy condition than a lot of cars on the road.

Shoshannah

http://www.bbc.co.uk/news/resources/idt-sh/how_toxic_is_your_car_exhaust

glentoran99

50Twuncle wrote: »

This also means that road tax will be free as well !!
What about I buy an old Jaguar - fit a new engine and gearbox and then slowly replace all of the body panels - suspension components, brakes, exhaust etc etc - when does the pre-78 car become new - \and subject to MOT and Road tax ?

https://www.youtube.com/watch?v=BUl6PooveJE