What wind noise there is left with the spacers attached to the standard screen seems to come from below the screen at the sides, the blast hits the shoulder area. Maybe it's time to knock up some small winglets to attach to the front fairing profile, there seems to be 2 fixings each side that fasten the inner black plastic to the outer painted section of the fairing, has anyone tried fixing anything here yet?
I've just referred to my crystal ball and it appears in your not to distant future a small package will be dropping through you letter box! :biggrin:
Different screens work to differing degrees for different people but regardless of screen it's now pretty much been proven that a large part of the 'turbulence' and 'noise' people complain about is from the airflow off the nose fairing either side of the bottom of the screen. The solutions.........(1) David (Aztec above;-) makes screen spacers that stand the screen off the bodywork a little, mixed views on how/why this works but most popular theory is equalisation of air pressure either side of the screen so less turbulence. The spacers have proved popular and the feedback good. (2) Let me see if I can persuade the man behind the latest innovation to cure (greatly reduce anyway) wind noise to pop in and explain. As an ex 'sportsbiker' I don't mind the wind..........I like my DIY shorty screen but have a PUIG screen for big miles (pop the sporty in the luggage!) but am interested in the new parts (2) to be available soon.
A major cause of noise is definitely the cut outs at the lower edge of the screen that allow the handlebars to turn full lock. Doesn't matter what you do to the screen, these cut-out gaps are still there and let a howling gales through. The problem becomes worse, the higher you set the screen. Just try putting your hand where the gaps are when riding to see what a blast there is and how much difference it makes. The fix is ugly!!! I made a larger screen with flaps where the cutouts are so that the bars pushed the flaps up at full lock. Very effective but even I couldn't live with the look of the thing. My current solution is two perspex deflectors standing up from the handlebars on brackets under the mirror mounts. When set carefully, they just clear the screen at full lock and deflect the blast away to the side. Better though still not pretty but that's what it takes. No amount of re-angling, spacing or different shape screens will plug these gaps which are a design feature caused by the height of the handlebars and the amount of lock, both of which are great features of the bike. The only other answer is to have a short screen and live with a smoother flow of air over your head though the necessary cutouts still conspire to screw up this smooth flow.
Small add-on wind deflectors like these that BMW make for the R1200GS......I think the term might be Merican, maybe referring to wind noise 'hiss'?
Morning all, Hiss Flaps is slightly embarrassing. It seemed funny at the time, but slightly raw since the forum at Ducati.ms filled up with it. They are now called CP Wings and are being put together as a kit. Pics attached. I also published a pattern, soon to be updated as V4, so that anyone who wanted to could produce them for themselves. To this end the DIY version is flat Perspex as they can be cut on a scroll saw most won't be able to heat form successfully. I have successfully polished the edges to look almost as good as a commercial screen using only a buffing wheel and fine finishing soap. The production versions are a bit more complex and machine made. In summary, the conclusion that wind noise on the MTS is coming from the fairing is absolutely correct. It's a bit more complicated than wind through a hole though, as the airflow is laminar over the front part of the fairing and is diffracting off the 'L' shaped sharp edge to 'spin' into turbulence as it shoots up and hits the chin of your helmet. This produces a great deal of noise. After sessions with a noise meter inside my helmet and ribbons taped to the edge of my screen I think the fairing issue is responsible for about 6-10dB of the racket in your helmet at 70mph depending upon the screen you use. The Wings help a lot, deflecting the air to either side of the rider's helmet and over each shoulder. The handlebar clearance does limit this of course, and larger riders will find some impact on their shoulders still. A rider of say 5'10" will be in clean air. If you are prepared to fit 30mm bar risers then the extra height that is available for larger Wings makes it much, much better still. Screens make a big difference too. In my examination the stock screen faired really badly, causing a lot of turbulence from the lip. Larger aftermarket screens were better to varying degrees. The conclusion I drew was that you do not want the lower part of your helmet to be in the marginal air between the screen and clean air. It's better to be in one or the other. Most of the screens don't shed air cleanly as they don't have laminar edges, so at the margin the air is going to be turbulent. You either need to be right behind a large screen or above a low screen to be comfortable. I've attached a simple sketch to illustrate the various screen idiosyncracies. On the MTS a barn door screen is out of context really, so I found that a stubby screen with the Wings was by far the neatest and actually the most comfortable option. Obviously weather protection becomes something of an issue, but rain cleared from my visor from the clean air flow, there is no 'head bobbing' and the wings take away the chest pressure. Actually, with no screen at all and the wings in place the tank and my crotch stayed dry in fairly heavy rain... until I stopped of course! There is a real need for a laminar flow screen for the Multi. After the Wings the next project is a one piece 'bra' type screen that will be low, but will have clean air departure from the upper edge. There is a lot of testing to do, but I have high hopes. Best, Chris
Well done, you have really done your homework. Im in for a set when ready. ps, what height are you n inside leg. Many Thanks Nigel
Hi Captian (lol) ............welcome to the forum, thanks for taking the time to post an overview of your excellent project That's (2) from my post above taken care of PS: PM Rob re the typo ;-)
OK, I'll use Plummet in the interim! Nice posting - just the kind of information we like to see. It is not quite clear if the deflectors are fixed to the screen? Does that mean screen drilling? They look as if they are formed in a curve to clear the handlebars on lock - correct? Whichever they are a neat piece of work.
No screen drilling, they attach via the two screw points just below the edge of the fairing that hold the black plastic inner fairing trim.....two longer black Torx screws used. The full story, the evolution of the CP Deflectors is here, a good read.....excellent project! Hiss Flaps - Ducati.ms - The Ultimate Ducati Forum
Hello Chris Many congrats on your learned and invaluable investigations on the one and only snag with my MTS. I am a real dumbo on any diy! You mention a "production" version. Please answer the maiden's prayer and tell me where and when I can get one. rlowe
