KAUST
Topic Author
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No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 4:38 am

I have noticed in most all light a/c and some larger ones (such as the Gulfstream IV), there are no windshield wipers...when you fly them in the rain, how well are you able to see? How does water not collect on it and blur your vision?

Thanks in advance -
KAUST
"Houston, this is Apollo 8. We are now in Lunar orbit."
 
Leskova
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 4:47 am

It's the same effect that enables you to switch the windshield wipers off in a car if you're going fast enough: the water simply doesn't stay on the window, it's blown off by the wind...

Also, as far as I know, the cockpit windows of planes have a coating designed to reduce the unevenness of the glass, so water has no place to "hold on to".
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BlatantEcho
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 4:50 am

As I'm sure many people do now, you can just put Rain-X on the windshield of your car.

Never use your wipers again.

George
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A10WARTHOG
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 4:58 am

There is also pneumatic rain removal systems
 
air2gxs
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 5:45 am

You pilot types out there: correct me if I'm wrong, but if its raining hard enough to obscure vision, you're pretty close to IFR conditions so your head should be inside, shouldn't it?
 
wing
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 6:20 am

You pilot types out there: correct me if I'm wrong, but if its raining hard enough to obscure vision, you're pretty close to IFR conditions so your head should be inside, shouldn't it?

You have to look out from the window during the flare.Also after you have the runway insight(which you have to at some point to compleate an IFR approach)it pretty much you look in and out all the time until the flare (but mostly outside and quick checks on the instruments and back out again)

There are some heavy weathers that even the fastest position of the windshield vipers are not anough to create a clean spot on the windshield.I remember one of my landings in mansoon season during flying for one of my wet lease operators four years ago.It was pretty challanging and teaching experience for a new FO like me at that time.
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KAUST
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 6:51 am

"You pilot types out there: correct me if I'm wrong, but if its raining hard enough to obscure vision, you're pretty close to IFR conditions so your head should be inside, shouldn't it?"

Do you mean like sticking you head out of the window to see where you are going?  Wow!
"Houston, this is Apollo 8. We are now in Lunar orbit."
 
air2gxs
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 7:16 am

Kaust,

By keeping your head inside we mean flying using instruments only. Artificial horizon, compass, HSI, CDI, whatever that particular aircraft has installed.
 
KAUST
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 7:43 am

Ok now that makes a lot more sense haha. Thanks for clarifying.

Incidently, I tried my first true "IFR" flight on my MS flight simulator recently. ("Fogged In" mode). It is definitly much harder than I would have given it credit for, and have a new found respect for those who fly in such conditions.


KAUST



"Houston, this is Apollo 8. We are now in Lunar orbit."
 
L-188
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 12:18 pm

A lot of aircraft use bleed air to flow rain off the window.

And then there is that chemical rain repellant that nobody likes.
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320tech
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RE: No Windsheild Wipers, How Can You See?

Mon Aug 23, 2004 1:04 pm

It can be raining pretty hard, and still be VFR. In Canada, at least, day VFR limits are three miles and 1000' ceiling. I've flown in some pretty heavy rain, but still had lots of vis.

Even in a C172, the rain runs off pretty well. Doesn't hurt to have that big fan up front, I guess. But I flew a glider in rain yesterday - couldn't see all that well on launch, but once we were above about thirty knots, the rain ran off quite well.
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