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:
- Behind the windshield – very little wind speed
- Above the windshield for 6 to 8 inches or more – a wind pressure well reduced from actual speed
- 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.
How are LIPs attached?
Each Laminar LIP is designed for a particular motorcycle model. There can be no universal LIP. Mounting methods also differ. If possible existing windshield mounting screw locations may be used. In most cases 3M Dual Lock™ or 3M VHB tape is used for attachment. These materials were designed to meet and surpass the rigors of attachment in an automotive environment. The Laminar LIP application utility is so unique that it has a Patent Pending.
What Material is used in the LIPs?
The LIP is made of an impact modified clear or smoked acrylic to make it more impact resistant as well as scratch resistant, this material is DOT approved.
Why we use 3M™ Dual Lock.
In the search to find an application method to adhere our Laminar LIPs to motorcycle windshields we listed the requirements.
- Versatile, we have 130 different LIPs to mount.
- No holes to drill
- Allow the LIP to be removed and/or adjusted after installation
After 20 years of investigation we have found nothing remotely close to Dual Lock in having these qualities. Certainly though Dual Lock has its drawbacks. Over time and/or if used improperly the pedestals can be damaged so that the mated strength is substantially reduced. The adhesive must be applied to a warm clean surface or adhesion will be much less. In these days of 200 mph motorcycles, strong headwinds and turbulent truck induced wind gusts the Dual Locks may be stressed beyond their design strengths. The mated integrity of the Dual Locks should be checked prior to each ride. If you are a rider that pushes the envelope of what can logically be expected of the Dual Locks perhaps you might elect to use nylon machine screws to mount the LIP. We at Laminar offer to send these fasteners free to anyone that desires them. We however, cannot warrant any products damaged by this drilling or fastening procedure.
We still believe that the Dual Lock system is a good system for most riders but if you ride significantly faster than the speed limit you might consider a mechanical fastening system.
Any problems with attachment usually relate to:
- The windshield surface not being clean and dry. If you attach the LIP to a dirty windshield, then how long you can enjoy the LIP depends on how well the dirt adheres to the windshield.
- The parts and air temperature not being above 70 degrees when applied. The temperature must be above 70 degrees F. for the 3M adhesives to bond well.
- The 3M adhesive is time setting, and 24 hours are recommended (80% bond) to permit a permanent bond (48 hours 100%). Once setup, the bond is very strong; cold or wet weather then has little effect