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Post by the light works on Nov 19, 2012 15:21:30 GMT
Never heard that one and it sounds plausible (show idea? emergency winter traction?) but Many wheel hubs don't have holes going through. I only know of one model of wheel that doesn't have holes. |
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Post by the light works on Nov 19, 2012 15:24:58 GMT
"TLW stated about the convenience of chains and storage...
I store my heavy cable, with my heavy jump starter cables, coiled up inside the spare wheel.
"
I keep my chain in the same compartment I keep the gas and oil for my chain saw. Which reminds me I need to stick the saw helmet back on board, too. we've got a windstorm blowing through and my hearing is enough damaged I don't need to be running the saw without ear protection.
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Post by rory on Nov 19, 2012 21:17:48 GMT
First off, when you clear your windows of snow, clear the bonnet and your lights. I keep approaching invisible cars in the snow every year, real pain in the arse. I always have a full winter coat, gloves, neckwarmer and hat in the car cabin and 24pack of water, tire pump with red triangle light that plugs in the lighter and two snow/ice clearing things for the windows, break one a year I get so much snow.
My lancers never been stuck yet in the snow, but I always get it serviced every 5000miles which is about every mouth and a half and have the new tires fitted just before winter everyother year. Take care of the car and the car will take care of you.
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Post by c64 on Nov 19, 2012 23:14:04 GMT
Oh yeah, that looks totally safe. It is! It passed the tight TÜV safety checks of Swizerland and is street legal. It's the only car in the world which requires a certificate of a chimney sweeper as well as for engine emissions to pass the safety inspections which are mandatory every two years. |
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Post by silverdragon on Nov 20, 2012 9:14:20 GMT
Why?...
In the UK, one half inch CLOSES roads.... we as a nation just PANIC.... it annoys me how incredibly futile resistance is to even the slightest of flurry, it happens EVERY year without fail, yet its always "Such a shock"...?...
Except me and my fellow "Experienced" truck drivers who just struggle on.
Try driving RWD 12 tonner on Ice.... I got shouted at for doing Doughnuts in the works car park one time,'cos the silly (deleted)'s hadn't gritted...
When I complained that it wasnt on purpose and WHY hadnt they gritted the yard?....
Honest?... OK, Cultural difference then, in the UK, I have yet to see a "factory fitted" wheel hub that doesnt have holes?... I have seen expensive after-market ones that are solid, but you dont get many of them here....
Can the idea be tailored to fit a solid hub wheel?... probably... I just dont know.... depends on how stuck you are I suppose, as they say, necessitate matrum invention, (sp?) The necessary is the mother of invention.....
Question, how well do vented disks work with a Solid Hub?... its just a thought, but I was under the impression they worked (better) with an air flow through the wheel?....
Aint Solid hubs heavier than conventional ones?...
Ok, depends what the numbers are, conventional may mean solid if "most" cars where you are dont have holes in the hubs?...
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Post by c64 on Nov 20, 2012 14:47:02 GMT
There is a lot of air rushing through the wheel houses while driving. Sports cars have extra vents to reduce the pressure in the wheel houses to ease the drag of compressed air.
The holes in the rims is to increase static integrity, not to vent the brakes at all. A lot of sports cars have hubcaps covering the holes in the rims to reduce the drag from the air squashing through the holes of the rims.
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Post by wvengineer on Nov 20, 2012 15:53:51 GMT
BTW... how does losing power affect your snowshovel?  Kinda hard to shovel/snow blow in the dark. I was using my porch lights for illumination. |
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Post by c64 on Nov 20, 2012 16:14:39 GMT
Reminds me of an incident in the research facility I once had worked for:
Coworker: "My Internet stopped working"
Me: "The Power is out!"
Coworker: "But my computer still works and the lights are still on!"
Me: "You have a Laptop, it has a built in battery. And only ¼ of the lights still work, the building has a battery backup, but our office switch isn't connected to the battery system!"
Coworker: "Isn't it your job to check the fuses?"
Me: *pointing outside* "Yes, but there is no point in doing that since the whole city has no power, too!"
Coworker: "But the cars are still driving!"
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Post by the light works on Nov 20, 2012 16:30:03 GMT
how did this coworker ever make it this far?
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Post by Cybermortis on Nov 20, 2012 16:40:31 GMT
When you say 'Co-Worker' I'm hearing 'Manager'....
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Post by wvengineer on Nov 20, 2012 17:05:49 GMT
That describes most of the people I work with, from line operators, to engineers, to upper management.
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Post by rory on Nov 20, 2012 19:46:55 GMT
One of my IT guys was telling me that in production they couldn't get the printer working, it was out of paper!
Dragon how do you have a rear wheel drive lorry? I've never seen a trailer with powered wheels.
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Post by c64 on Nov 20, 2012 21:22:24 GMT
how did this coworker ever make it this far? The building was stuffed with Techies (like me), mathematicians, programmer, historians of art, artists and secretaries. I think she was a doctor of art history or one of the artists. This place was a weird mix of professions, a research facility with a museum "built in", I could write books about such incidents! |
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Post by Lonewolf on Nov 21, 2012 5:44:13 GMT
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Post by silverdragon on Nov 21, 2012 7:21:01 GMT
Reported conversation from a tech help line...
Is your keyboard wireless?
I have no idea....
Is there any wires attached?...
There are loads of wires, I cant tell which is which.
Pick up your keyboard and take four steps backwards, if it comes with you with no resistance, its wireless....
Can I just comment on this bit...
I have wheels that have direction of rotation, the same with the tyres, as in, I cant "Swap sides" with the wheels...
The wheels have been designed to work as Fan blades that pull air out from the wheel arch, and the tyres are designed to push water out from under the tyre to the outside of the car.
This isnt a sports vehicle, its a Toyota Avensis... I will admit the hubs and tyres are after market replacements.
Drag created by the holes?... Minimal compared to the added benefit of air-flow from under the car to the outside of the vehicle....
Effectively this also "Sucks" the car down onto the road at speed that aids handling and stability... kind like having the extra air spoilers that sports cars have.
It also creates HUGE flow of air over the brakes that keep them cool.
If you video my vehicle passing over standing water, you get a huge rush of vapour/water spray away from my wheels...
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Post by c64 on Nov 21, 2012 15:03:02 GMT
It's not that simple as you think. Look at page 5 and 6: tinyurl.com/av7b9oyHere you can see a diagram of the velocity of the air in a wheelhouse. If air would come out of the wheels, this would make it a lot worse by spreading and chopping the air flows causing even more drag. Now the trick is to add little spoilers to ease all the action of the air twirling around and causing drag, especially minimizing the wake turbulences coming out of your wheel houses. |
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Post by c64 on Nov 21, 2012 15:10:17 GMT
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Post by silverdragon on Nov 22, 2012 9:28:06 GMT
The underneath of a vehicle, normal road vehicle, is not that aerodynamic in any case.
A Little drag?.... I cant see the problem.
I am not setting the land speed record, I do mostly under 50 mph driving in any case, as I refuse to drive more than [x] number of miles (half hour) for work purposes as I dont get any mileage allowance.
However, chopped up or not, some air flow through the wheels is good for me, it keeps what is under there cool.
"Solid" wheels are not that popular as an after-market add on in the UK.
If there was a problem with the airflow and drag, I expect this would have been addressed anyway on the "Hyper mile" eco-warrior hybrid slugs they are producing these days... but all of them have perforated wheels still?....
Yes I can see from that last diagram (the first one refuses to load for some reason... unknown file type... I am using a "light" Linux that may not do PDF's too well at the moment?.. what type of file was it anyway?..)
Well, the last diagram shows some probable problems, but again, I cant see how that will affect vehicle performance at "surface road" (town traffic) that would warrant the expense of "Fixing" it....
Drag at low speeds?... I spend all day in the works vehicle that is aerodynamically worse than a brick, I guess half the engine power at 50 mph is wasted dragging the drag, not being uncaring or dismissive about this, but I should worry about a little drag?... or a little EXTRA drag caused by wheels designed to create airflow over the brake system?....
What you gain on the swings you loose on the roundabout, as someone a lot wiser than me once said?...
And BTW, when I DID do a little racing in my time, the first thing I did to any vehicle was upgrade the brakes....
Being able to stop?... as one of my friends remarked "Steaming head first into Stowe (Silverstone, end of long straight) with no brakes... nil points, call a tow truck...."
For me, air-cooled wheels and brakes, however you get that, are a lot more important than aerodynamics?....
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Post by mrfatso on Nov 22, 2012 11:38:00 GMT
Thre reason why we have such a panioc with a little snow is all due to money. It`s worth while in US,Canada or closer to home Scandinavia having all the equipment needed to clear roads quickly and effectively. The expect to have months of such weather on a seasonal basis. In the UK we will hav one or 2 such events in a winter, and it is not reasonably to have all the snowploughs need,cars to have snow chains, drivers don`t have the experince need to drive in such conditions.
The story about the computer reminds me of an old friend of mine, who used to work in Tech support for a local company. He claims that he was asked to help as the "Cupholder" was broken on someones machine, when he got to the office ,the CD drive tray had been snapped off.
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Post by c64 on Nov 22, 2012 14:00:38 GMT
The file is PPT - Powerpoint which can be used with Open Office.
The pressure inside the wheel houses around the tire can rise to 0.1 bar at just above 100 mph, that's 10% more pressure and air is like a liquid. It eats up an awful amount of energy.
The reason why people don't want fuel efficient wheel houses is an aesthetic one. People don't want ugly looking wheel houses which look like from an ugly truck and they sure love a fake radiator grill which also eats up a lot of energy caused by extra drag.
VW once made a car without visible radiator and people started to attach fake grills or at least stickers to make it look like it has a grill. Not even 5 years later, VW came up with a "facelift" adding all the design items people love so much destroying the excellent fuel efficiency of the car body!
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