ADR 15 - Demisting of Windscreen

[merc-blue]

a few months,
but it never has worked well,

the section came from the engine section i just found it then

[oldcorollas]

cos you have greasy mitts

get some windex or whatever (not no-name brand ) give ti a gooood clean, then a gooood rinse... then, to be sure, get some alcohol or similar solvent, and wipe it down to get the last of your greasy fingerprints off...

clean glass = good.

the condensation occurs partially because there are small bits of crap that act as initiators for the condensation...

[merc-blue]

yeah it gets cleaned every few months in such a fashion,

[merc-blue]

I have had a quick brainstorm,
and come up with a smaller lighter less "clunky" system which i may investigate
im just soo against having the old system in there

[oldcorollas]

maybe you could find why you have so much moisture in there....
perhaps you have a window leak?

demister = good when it is working the way it is meant to....

or have a look at more modern versions.. just removing it is nto the answer

[merc-blue]

I have been looking at alternatives and as i said i have come up with somthing less clunky and more moden i will see how it goes retrofitting that then go from there

[YelloRolla]

I have given this a bit of thought at different times, and going from how VW's were done, I thought that the idea of running a duct from the exhaust manifold to the existing ducts under the windscreen, with the wind power supplied by a small computer fan... Just an idea, and not without it's flaws (carbon monoxide poisoning is not high on my agenda), as long as the manifold area didn't suffer from exhaust leaks then it should work OK.

[takai]

Im currently using a 12V high airflow 92mm fan in the race car to suffice as a demister. Its a stupidly fast delta and sounds like the car is taking off when its on, but hell it works very damn well.
Worked far better than the demister which was in the AE86 did when it was still in there...

[merc-blue]

takai,
That intresting, What feeds it? just fresh air? cabin air? warm air from....?

[takai]

Just cabin air, its basically bolted to the demister duct via a piece of 2mm alloy.

[merc-blue]

intresting, cause that was one of my options using a "small" electric blower,
ofcourse there will be some development using different blowers and vents but i think i might have a look at doing that aswell

What size fan did you use and what sorta flow did it produce,
Im thinking to my self i dont want a huge 120mm fan pushing 50dBA

[thechuckster]

a VW demister/heater is quite an effective thing - will make the cabin uncomfortably very quickly - and with very dry air too. plus it doesn't need the fan going once you're moving forward.

but they were always prone to the flex hoses (they join the heat exchanger pipes to the body tubes) failing - plus when you remove the engine in a hurry, they usually get crushed or damaged (e.g. you drop the engine on them)

If you had a race car with part of the zorst being boxed-in somewhere inside the canin you could do it?

["Z" UTE]

The problem with extracting hot air from an around an exhaust, is that you can be poisoned with Carbon Monoxide gas, if there is an exhaust leak. You also run the risk of bringing in all sorts of oil smells from the engine bay. A heat exchanger works best to prevent this. Damn why did the manufacturers use a radiator/heater core, ah crap that is a "heat exchanger". My experience in a TA22, with piss poor de-mister, was to replace the fan motor, and clean the mesh screen.

cheers Chuck.

cheers Chuck.

[wagonist]

why not?
alot of cars use them, it is legal.

Sorry to dig up an old thread, but it is not legal to use a demister like on your rear window on the front one.
Yes, they use them on race cars, but they are higher skilled drivers & they don't have to scan all around for pedestrians, cyclists, trucks, etc (well I hope not anyway )
The theory is that the "bars" block part of your vision. They are legal on the back window because they are further away from your eyes (& therefore don't appear as big, though in ute I'm not so sure) & you've also got other mirrors & windows to look out of.

["Z" UTE]

There is new technology now available, which uses a thin metalic film between the layers of glass, through which the electric current is passed. TRD will be using this on the '07rally Corolla's. A glass manufacturer in Melbourne is copying the original size and shape of the screens, with the metalic film inserted between the laminates.

V8 Supercars were the first to run them this year.

Come to think of it, we used "gold" in the aircraft cockpit windows eons ago, so technology is not so new.


cheeers Chuck.