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Join Date: Aug 2000
Location: No longer in Jurassic Park eating Toblerone....
Posts: 2,661
KelvinD; that was part of the octane boost, an increased resistance to "pinking" or "knocking".
rogerg; nothing to do with lubricating the valve guides, that's what the engine oil is for. It was all to do with valve seat wear:
[QUOTE
Microwelding of the exhaust valve and valve seat is now thought to have occurred due to the increase of flame front speed when the switch to unleaded came about. The increased combustion pressures caused 'micro welding' in older style motors that had the valve seats machined into the cast iron head. Retarding the timing of the engines reduced the combustion pressures and proved to be an effective short term measure in the switch to unleaded fuel. The long term solution was hardened steel valve seats.[16]
][/QUOTE]
rogerg; nothing to do with lubricating the valve guides, that's what the engine oil is for. It was all to do with valve seat wear:
[QUOTE
Valve wear preventative[edit]
It is a common misconception that 'Tetraethyllead works as a buffer against microwelds forming between the hot exhaust valves and their seats.[14]' Once these valves reopen, the microwelds pull apart and leave the valves with a rough surface that would abrade the seats, leading to valve recession. When lead began to be phased out of motor fuel, the automotive industry began specifying hardened valve seats and upgraded exhaust valve materials to prevent valve recession without lead.[15]Microwelding of the exhaust valve and valve seat is now thought to have occurred due to the increase of flame front speed when the switch to unleaded came about. The increased combustion pressures caused 'micro welding' in older style motors that had the valve seats machined into the cast iron head. Retarding the timing of the engines reduced the combustion pressures and proved to be an effective short term measure in the switch to unleaded fuel. The long term solution was hardened steel valve seats.[16]
][/QUOTE]
Join Date: Dec 2003
Location: FL450
Posts: 482
The reason why there is now a requirement to register for settled status is because there was no registration requirements upon first entering the UK. Unlike everywhere else in Europe. Thus no-one has a clue how many came in. My suspicious mind tells me that that was by design, in order to quell the concerns about the numbers. Now all we can do is guess. Similarly no-one will ever know how many illegal migrants there are in the UK. How could you? By their very nature they are illegal so cannot and will not ever register their presence so just live on the black market and by crime. So population registers are now just approximate and always undercalculated. If there was a requirement to show your passport/ID papers etc., or something confirming your legal status to be there in order to do most things, again, like other countries, it would go a long way to helping the situation?
Join Date: Aug 2000
Location: No longer in Jurassic Park eating Toblerone....
Posts: 2,661
Kelly Hopper; in the past I would have strongly disagreed with you but now that there is such uncertainty about the actual number of people in the country I think it's time to introduce some proof of identity requirement when using services like the NHS.
Apparently some NHS hospitals do ask for proof of the patient having the right to live in the UK which surprised me as my family haven't been asked when visiting A&E over the last few years.
Apparently some NHS hospitals do ask for proof of the patient having the right to live in the UK which surprised me as my family haven't been asked when visiting A&E over the last few years.
Join Date: Aug 2000
Location: No longer in Jurassic Park eating Toblerone....
Posts: 2,661
Avionker; you weren't alone!!
The human body also has a complete inability to get rid of TEL from the system so people who's birth post dates the banning of leaded fuel can be distinguished from their predecessors by the presence of TEL in their blood. Unless they fly piston engine aircraft which use UL91 or 100LL of course!!
The human body also has a complete inability to get rid of TEL from the system so people who's birth post dates the banning of leaded fuel can be distinguished from their predecessors by the presence of TEL in their blood. Unless they fly piston engine aircraft which use UL91 or 100LL of course!!
Join Date: Aug 2000
Location: No longer in Jurassic Park eating Toblerone....
Posts: 2,661
rogerg; do you think it's Brexity that we are stealing a march on the EU and banning carbon fuelled cars in 2035 rather than 2040?
The car manufacturers are going to have to get their collective fingers out to provide vehicles with a reasonable range and comparable cost by then....
The car manufacturers are going to have to get their collective fingers out to provide vehicles with a reasonable range and comparable cost by then....
Join Date: Oct 2004
Location: UK
Posts: 2,140
Originally Posted by LowNSlow
rogerg; do you think it's Brexity that we are stealing a march on the EU and banning carbon fuelled cars in 2035 rather than 2040?
The car manufacturers are going to have to get their collective fingers out to provide vehicles with a reasonable range and comparable cost by then....
The car manufacturers are going to have to get their collective fingers out to provide vehicles with a reasonable range and comparable cost by then....
Join Date: May 2011
Location: Hampshire
Age: 73
Posts: 824
ATNotts: I agree with what you are saying re keeping petrol/diesel cars on the road etc. However, there must surely come a tipping point at which the petrol companies won't be selling enough of the stuff to justify staying open and that will be the end of it?
Join Date: Feb 2007
Location: England
Posts: 406
Originally Posted by ATNotts
Or since, as I thought I understood it, it was only the sale of new petrol, diesel or hybrid cars that is proposed to be stopped in 2035, there'll be an explosion of repair shops set up to keep cars with traditional engines on the road until they have finally rotted. UK roads could resemble Cuba by 2085 vehicle-wise with early 21st century relics continuing to populate our motorways.
*Crossed with Kelvin*
Join Date: Aug 2010
Location: UK
Age: 64
Posts: 48
Originally Posted by Sallyann1234
How many fuel stations will there be after petrol/diesel vehicle production has been stopped for a few years? It could be rather like the same range anxiety that we have now with electric cars. Carrying cans in the boot?
*Crossed with Kelvin*
*Crossed with Kelvin*
Join Date: Jun 2006
Location: Wilts
Posts: 135
Funnily a lot of the recent contributions have been about the past and what we are getting rid of, when a lot of The Same contributors have previously said how hard the future will be because of brexit.
Have we any idea what things will be like in 15 years time?
Electricity may not be available for all the world but let’s not get disheartened.
Always look on the bright side of life.
Have we any idea what things will be like in 15 years time?
Electricity may not be available for all the world but let’s not get disheartened.
Always look on the bright side of life.
Join Date: Oct 2002
Location: West Wiltshire, UK
Age: 68
Posts: 412
I've been driving around in electric cars for a year and half now. The one I have now can pretty comfortably do around 250 miles or so in winter between charges, and in theory can do around 340 miles in warm weather (with a very light right foot). The technology exists, it's just a matter of bringing the price down and sorting out the charging infrastructure. Of the two, the latter is the biggest challenge, as the switch to electric cars pretty much kills the idea of conventional filling stations, as the vast majority of people charge almost exclusively at either their home or destination. To make this work for all those who don't have off-road parking means putting loads of charge points in, maybe on lamp posts. The power requirement isn't that massive, and the grid will be able to cope (it has a pretty hefty excess capacity at the moment, anyway).
Getting the rapid charging networks sorted will help. At the moment the only network that is dead easy to use is the Tesla one. Tesla have shown that charging at 200 to 250 kW works OK, and that sort of charge rate will add around 150 miles of range in ten minutes. I bet a fair few people stop for more than ten minutes on a long trip, where they might need to charge on route, anyway.
Getting the rapid charging networks sorted will help. At the moment the only network that is dead easy to use is the Tesla one. Tesla have shown that charging at 200 to 250 kW works OK, and that sort of charge rate will add around 150 miles of range in ten minutes. I bet a fair few people stop for more than ten minutes on a long trip, where they might need to charge on route, anyway.
Join Date: Apr 2006
Location: uk
Posts: 891
Petrol? Batteries? Diesel? In 20 years time, none of the above.
Fuel Cell technology will have overtaken them all as the source of propulsion power on the ground, in the air and on the oceans. Nothing else makes sense.
You saw it here first. If I'm wrong, please sellotape a note to my headstone telling me all about it.
Now back to poor old BoJo, already having to row back on his promises. All we can do is laugh a bit, and then hope that some good comes of it all when reality eventually guides the poor sod's decisions.
Fuel Cell technology will have overtaken them all as the source of propulsion power on the ground, in the air and on the oceans. Nothing else makes sense.
You saw it here first. If I'm wrong, please sellotape a note to my headstone telling me all about it.
Now back to poor old BoJo, already having to row back on his promises. All we can do is laugh a bit, and then hope that some good comes of it all when reality eventually guides the poor sod's decisions.
Thought police antagonist
Join Date: Jul 2003
Location: Where I always have been...firmly in the real world
Posts: 85
Originally Posted by old,not bold
Petrol? Batteries? Diesel? In 20 years time, none of the above.
Fuel Cell technology will have overtaken them all as the source of propulsion power on the ground, in the air and on the oceans. Nothing else makes sense.
You saw it here first. If I'm wrong, please sellotape a note to my headstone telling me all about it.
Now back to poor old BoJo, already having to row back on his promises. All we can do is laugh a bit, and then hope that some good comes of it all when reality eventually guides the poor sod's decisions.
Fuel Cell technology will have overtaken them all as the source of propulsion power on the ground, in the air and on the oceans. Nothing else makes sense.
You saw it here first. If I'm wrong, please sellotape a note to my headstone telling me all about it.
Now back to poor old BoJo, already having to row back on his promises. All we can do is laugh a bit, and then hope that some good comes of it all when reality eventually guides the poor sod's decisions.
I only hope the "will of the people ", another from the hackneyed mantra's we used to hear on a frequent basis, prevails and he's forced out of office......along with the rest of his acolytes and one spad in particular follows him into oblivion .
Thought police antagonist
Join Date: Jul 2003
Location: Where I always have been...firmly in the real world
Posts: 85
Originally Posted by sidevalve
You'd be a shoe-in for Private Fraser's role, KnC..
You must have been quite the little ray of sunshine in Eng Wg!
You must have been quite the little ray of sunshine in Eng Wg!
Join Date: Jun 2006
Location: Wilts
Posts: 135
Originally Posted by sidevalve
You'd be a shoe-in for Private Fraser's role, KnC..
You must have been quite the little ray of sunshine in Eng Wg!
You must have been quite the little ray of sunshine in Eng Wg!
I don't own this space under my name. I should have leased it while I still could
Join Date: Dec 2002
Location: Lincolnshire
Age: 77
Posts: 16,744
Originally Posted by golfbananajam
I suspect there will be diesel on sale until haulage, farming and other heavy machinery industries find a way to replace their fleets too or at least until alternative fuels are found for combustion engines. Can you imagine a 20 tonne crane running on batteries?
Mine is 15 as was my previous car. It is comfortable achieves 40+, but it will cost more than its worth to fix its suspension. It cost the same last year too. Time to change.
