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Old 09-23-2011, 10:10 AM   #841
albany23
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Location: Constanta, ROMANIA
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Hi guys,
This is the Puig screen, light smoke version. Only one size for the F800, but i think its fine. Ill test it tomorrow on a 250km trip.
Fitment took less than 5 minutes, and the picture shows the OEM screen underneath. It feels steady in the parkinglot. We'll see tomorrow.
Cheers,
Mihai


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Old 09-23-2011, 10:11 AM   #842
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More pics of the Puig screen. Only one attach per post(iPhone)


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Old 09-23-2011, 10:13 AM   #843
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Pics of the Puig screen.


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Old 09-24-2011, 02:28 AM   #844
SimonomiS
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Computational Fluid Dynamics

Hi guys if anyone is interested I did a CFD analysis of the F800GS for my masters dissertation - take a look below:

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If there is any particular aspect of the touring screen dynamics you would like to see - let me know
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Old 09-25-2011, 10:48 AM   #845
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The simulation was set up so the air speed was 44m/s (99.4 mph) - the iso surface shown in green is air travelling at 30m/s, which is a good way to understand the windbreak volume, The person is a 95th percentile UK male (me) and you can see that the screen is the BMW touring screen. Its pretty obvious that it doesnt offer particularly good windbreak around the shoulders which after my research is one of the main reasons for wind noise. Bernoulli's pressure equations state that the faster the velocity of fluid flow the lower the pressure, meaning that the windflow over our shoulders is effectively sucking air out of our helmets. The biggest problem which is what we would expect is the wake created by the screen and bike punching a hole in the air and the riders helmet being so far behind the screen in an upright position - this gives enough time for the air to swell into random vortices right at our helmets - which i guess we all knew anyway :)

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Old 09-25-2011, 07:19 PM   #846
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That riding bare-foot shit looks dangerous.
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Old 09-30-2011, 07:27 AM   #847
JRWooden
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Quote:
Originally Posted by SimonomiS View Post
The simulation was set up so the air speed was 44m/s (99.4 mph) - the iso surface shown in green is air travelling at 30m/s, which is a good way to understand the windbreak volume, The person is a 95th percentile UK male (me) and you can see that the screen is the BMW touring screen. Its pretty obvious that it doesnt offer particularly good windbreak around the shoulders which after my research is one of the main reasons for wind noise. Bernoulli's pressure equations state that the faster the velocity of fluid flow the lower the pressure, meaning that the windflow over our shoulders is effectively sucking air out of our helmets. The biggest problem which is what we would expect is the wake created by the screen and bike punching a hole in the air and the riders helmet being so far behind the screen in an upright position - this gives enough time for the air to swell into random vortices right at our helmets - which i guess we all knew anyway :)

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Simonomi:
That is very clever... now you've got me wanting to go back to school again damit....
Not sure your dissertation is complete or not, but I'd be very interested how these design points do:

1) "vented" (hole in screen) shields e.g. http://www.calsci.com/motorcycleinfo/F800GSprod.html

2) The vented "dual screen" options with the two-piece design where air can flow between the lower and upper plates e.g.: http://www.wunderlichamerica.com/mot...e/8110157.html

3) How the "angle of attack" might affect the screen operation on adjustable models like:
http://www.madstad.com/s.nl/sc.7/category.1118/.f
http://www.madstad.com/s.nl/sc.10/.f

4) If this windscreen edging has any real impact on screen performance: http://www.saeng.com/product.php?id=581&category=80

Can I "help" any more with your dissertation?
Maybe you can go for a PhD?

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Old 10-02-2011, 12:02 PM   #848
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I've just had a good look at all 57 pages of the thread.I also have a Vario Touring Ergo Wund's screen on my F8. But this f@cking Desierto looks great on that bike...f@cking crisis... I like this Desierto...I like this des... f@cking crisis
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Old 10-23-2011, 06:35 PM   #849
LadyBIRD
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touring Screens

I know it is not pretty but I wanted to ride without being beaten by the wind. I am 5'11" with a 34" inseam. I am still using the stock seat.

The stock screen was fine but anything above 60 it was work to hang on.

I tried the Britannia Composites Mirage 2. It was great without my helmet but with my SHOEI it was terrible. There was so much buffeting that everything was blurry and I couldn't read any signs. Even with it in the lowest position the wind noise made my ears ring till the next day.

For me, the 20" Madstad was the answer. With the screen all the way up I have no wind hitting me at all. It is quiet! It offers more protection from the wind than my husband's 1200 GSA stock screen.


If you want to ride with the wind in your face, hair or whatever......don't buy the Madstad.


Update...

I spoke with Ian at Britannia. He said he has had one other person say that they also had the terrible buffeting issue that I had. The other person was the same height as me and also female. Maybe my gender is the issue! LOL!!

Seriously though, he said he had just changed the design of the screen and offered to send me the old screen to try out. It was here the next day but unfortunately it didn't make enough of a difference for me to keep it either. I even tried wearing a different helmet.

Ian was GREAT to work with and more than willing to let me return the Mirage 2.

I guess I'll be sticking with the Madstad.
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Old 10-23-2011, 08:17 PM   #850
señormoto
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Quote:
Originally Posted by LadyBIRD View Post
If you want to ride with the wind in your face, hair or whatever......don't buy the Madstad.
Glad it works for you, it's always frustrating to buy something and not have it live up to the requirements. That said, and yes I am trying to be nice, that screen looks like you bolted a refrigerator to the front of your bike! It's HUGE!

Wow... super big. Easily the largest screen in the 57 pages thus far. I bet it is amazingly good for cold weather riding (sub 35F). Do you have plans to own more than one screen - maybe have two or three for different riding temps? That is what I do to a degree: stock screen for quick rides/2-up/hot temps and the TT screen for long rides and colder temps.
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Old 10-23-2011, 08:30 PM   #851
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Quote:
Originally Posted by LadyBIRD View Post
I know it is not pretty but I wanted to ride without being beaten by the wind. I am 5'11" with a 34" inseam. I am still using the stock seat.

The stock screen was fine but anything above 60 it was work to hang on.

I tried the Britannia Composites Mirage 2. It was great without my helmet but with my SHOEI it was terrible. There was so much buffeting that everything was blurry and I couldn't read any signs. Even with it in the lowest position the wind noise made my ears ring till the next day.

For me, the 20" Madstad was the answer. With the screen all the way up I have no wind hitting me at all. It is quiet! It offers more protection from the wind than my husband's 1200 GSA stock screen.

If you want to ride with the wind in your face, hair or whatever......don't buy the Madstad.
I am 6ft with 34" inseam and also have the mirage 2. All the way down you will get full wind in your face. The screen should be adjusted nearly all the way up if you want to shoot the air up over your helmet.
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Old 10-23-2011, 09:24 PM   #852
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Quote:
Originally Posted by LadyBIRD View Post
I know it is not pretty but I wanted to ride without being beaten by the wind. I am 5'11" with a 34" inseam. I am still using the stock seat.

The stock screen was fine but anything above 60 it was work to hang on.

I tried the Britannia Composites Mirage 2. It was great without my helmet but with my SHOEI it was terrible. There was so much buffeting that everything was blurry and I couldn't read any signs. Even with it in the lowest position the wind noise made my ears ring till the next day.

For me, the 20" Madstad was the answer. With the screen all the way up I have no wind hitting me at all. It is quiet! It offers more protection from the wind than my husband's 1200 GSA stock screen.


If you want to ride with the wind in your face, hair or whatever......don't buy the Madstad.
I just installed the Madstad system also. I'm 5'11" with a 32" inseam, have a custom seat which is a bit higher but went with the 18" screen. I have mine adjusted lower than yours and just have a light breeze on my face. I sure like the feel of it so far. I don't mind the OEM screen but now that it is getting a lot cooler, a bit more protection is fine by me.

Although mine is smaller than yours, I was amazed at the size of the thing when it came out of the box. I may well look at getting a replacement for the main screen later on that looks a bit better. I think I will also try tilting it back more - may lower its profile a bit.
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Old 10-24-2011, 06:51 AM   #853
LadyBIRD
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I agree! It is HUGE!

I sure wish I had had it installed instead of the Mirage 2 when it was 35° on my last ride. I couldn’t find any position with the Mirage 2 that was comfortable for me. All the buffeting happened with the screen all the way up. I wish it had worked for me because it sure looks better and I liked that it had a GPS mount and moved the gauges up higher.

I was thinking of putting the stock screen back on for off road riding. Six bolts and the Madstad is off in less than a minute.

In the pic the screen in all the way up. With the screen in the lowest position I get just a little breeze at the top of my helmet.

It is good that we have a lot of windscreen options. No two people have the same experience with them. You just have to keep trying until you get what you want. I only hope the Mirage 2 people are good about returns.
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Old 10-26-2011, 02:15 AM   #854
MattyBooms
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Mirage 2

Just returned from testing my new Mirage 2 screen.
Easy install. Looks good. Very happy with wind/bug protection.
My preference was for a halfway height setting (I'm 172cm short).
If like me you have Barkbusters and a Ralle-Moto Steering Damper fitted you may find that the handguards foul at full lock.
With all set normal, the inner ally end of the Barkbusters will contact the edge of the taco's bottom half towards full lock.
After adjusting the angle of the Barkbusters they now comfortably clear the taco...unfortunately the outer plastic guard of the Barkbusters now foul on the tinted screen just before full lock. Raising the screen will allow full lock without contact.

Sooo I have to raise the screen from above my desired setting if I wish to turn the bike at full lock...not ideal.
No big deal whilst riding, but an issue whilst parking. More so in the event of a stack...Barkbusters vs pretty new screen...no thanks.

Anyone had the same dramas? I'm contemplating a little surgery...and the screen having a slight shave (<15mm) is possible.

Please be aware that this problem appears likely only if you have the handguards and the steering damper.
Without the steering damper there would be no problem...but I like my steering damp. And be buggered if I'm going bush without handguards.

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Old 10-26-2011, 08:03 PM   #855
RexBuck
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With my Madstad, have it set fairly low (bottom of screen just at the top of the headlight), tilted back a bit and pushed as close as I can to backplate. Have Scott stabilizer and Barkbusters. Hand guard just touches the windscreen at full lock. Works for me.
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