BMW R1200R R1150R/T F800 K1200R R1100R/T R1250R RnineT Message Board

This is a photo of my bike....



...the screen is BMW but, can anyone tell me which one it is?
And... is there an effective 'lip' available for this screen? I've got a long ride coming up and I'd like to deflect the airflow over my helmet if possible. At the moment the air, and the bugs, hit me right in the visor! I don't like the look of some of the tall screens, although I'm sure they're effective.

And a damn fine looking bike it is. Someone posted a thread on this site about a deflector that they thought worked very well. I've been considering one for my bike also, but haven't pulled the trigger yet.

I will poke around and see if I can find the comments.

Tony

I still don't know which screen it is that you have on your bike, but it was the laminar lip that has been mentioned in previous threads. You can find them at....
http://www.laminarlip.com/r1150r.php

Here is a clip of thier sales picth fromt the site.

The design of some fairings allows the wind to flow around one side then the other creating buffeting at the rider's helmet. LIPs are designed to trap the air from flowing around the sides of the windshield and redirect it to flow over the top, lessening or eliminating this buffeting.


The LIP is an inverted airfoil located above the rear edge of the windshield. As air flows between the windshield and the LIP, it follows the underside airfoil of the LIP and is redirected more vertically. This air eddy then diffuses the oncoming air, in effect, to raise the blast of this oncoming airflow. The end result is that there seem to be three different air speed zones as you ride along at a set speed:
1. Behind the windshield - very little wind speed
2. Above the windshield for 6 to 8 inches or more - a wind pressure well reduced from actual speed
3. Above this height the blast that was at windshield height before the LIP was installed

Because all fairings and windshields are different, the effectiveness of the LIP may vary model to model.

Another feature of the inverted airfoil is that it increases down pressure on the front wheel. As a motorcycle proceeds down the road, air pressure (effectively from the front-- although the air really is not moving, the bike is) tends to rotate the motorcycle around its roll center lifting the front wheel and loading the rear. The LIP opposes this action to some degree.

The LIP does all this without your having to add a larger windshield. In many cases it works better than the taller replacement accessory windshields, because although they may be taller, they do nothing to control airflow. Sport bike riders also can benefit from the LIP. When cruising along normally the wind pressure will be raised, and when flat on the tank behind the LIP turbulence will be much less.


Have Fun,

Tony

Never before seen that screen! it looks nice.

Need a better picture really - it looks like the small speedster screen underneath the medium one to me!

The metalwork supporting will be the giveaway, there are three types of OEM shield right?

hirsty wrote:Need a better picture really - it looks like the small speedster screen underneath the medium one to me!

The metalwork supporting will be the giveaway, there are three types of OEM shield right?

Better photo to follow...

I have a similar one to that on mine. It is an Eagle Screen which I got from Perth in Australia. Mine is tinted. It mounts on the speedster screen brackets.

It could be the 380 mm high screen, but there is too much glare to see the mounting bracket. A pic from a different angle would be helpful.

As promised, here are some close-up photos of the mystery BMW screen...









Do these pics help anyone to identify the screen?

BTW, what do you think of my Verholen bar-backs? I think they look good and they've certainly made the riding position more comfortable for me...

that is the 380 mm high screen.

Yes, that's the 380.

Thanks guys... bit of an anti-climax really, I was expecting an exciting name for it!

Now it only remains for me to find a flip-up lip to fit, if they're available.

I like the look of that screen and have been thinking about getting one. Does anyone have any feedback on it's performance in regards to protection and buffeting? I have a fly now and have been running without it cause the wind noise is quieter without.

fallingpines wrote:I like the look of that screen and have been thinking about getting one. Does anyone have any feedback on it's performance in regards to protection and buffeting? I have a fly now and have been running without it cause the wind noise is quieter without.

I like the look of it too... glad it was already fitted to my bike when I bought it!
I've noticed no buffeting to speak of with this screen but, as I've already posted, the airflow is deflected directed towards my visor, with the result that bugs accumulate quickly. BTW I'm 5' 10'' and have the standard BMW seat fitted.

I have this screen and like it. Much less buffeting with it installed than riding naked. Does a good job of taking the pressure off your chest and I think the lower drag bumps the crusing MPG a click or two. The angle of the screen does shape the air to hit me right in the kisser. I have the same thought of some sort of foil, wing, thigh to raise the bug flow over my helmet. Still looking as nothing I have seen is purpose built for this screen.

I switched to that screen from the touring screen and had about 7000 miles on it and now about 5000 on the 380.

Never crazy about the "look" of the touring screen so I feel this one--the 380-- wins hands down in looks.

Re: buffetting--way less than with the touring screen, but the touring screen gave more protection from bugs; haven't noticed much difference re road debris, but maybe I just haven't run across much debris. buffetting is still there, but I'm not complaining about it.

The bugs now catch my visor--I am almost 5'8" and am using the standard seat. Formerly they mostly hit the screen, though some did hit my visor. Rain does not seem to be a problem with the 380.

What I REALLY like about the 380 vs the touring screen is the mounting--so much more substantial. My touring screen's wellnuts often came loose, and removing it for a good cleaning was ALWAYS a mojor hassle because of the mounts.

I like the 380 much more, on balance, and can live easily with the less protection. I am considering seeing if I can mount the touring screen on the 380 mounts--this would require drilling new holes in the screen, but might try it and will report when/if I do. The curve of the touring screen might not allow it though. Maybe I'd achieve more protection with a stronger mount???

John

not sure but I want one!

http://store.bobsbmw.com/index.asp?Page ... ProdID=239

I love that screen!

Am I the only one that looks at those vertical bracket "horns" and envisions being skewered if I ever went over the handlebars?

CordovaJohn wrote:Am I the only one that looks at those vertical bracket "horns" and envisions being skewered if I ever went over the handlebars?

I don't worry about that. If that is a potential then there are a lot greater things to worry about. And I don't think the physics of your body being projected at the screen would allow skewering. The screen would hit you first. BTW, the retaining bolts screw into the bracket.
Besides I was MUCH more concerned that my touring screen, with its "breakaway" wellnuts, would break free of its mount and fly in my face. Not to start a flame war, but that wellnut design was terrible on my bike with my brackets. Going 70 and seeing one of them work its way loose is not assuring.

John