2007 1250s windshield

[H2RICK]

Towel test already performed by your humble tester last summer, with the stock screen and Laminar Lip Touring model.


I did NOT cover the vent in the stock screen since the ugly setup I had with the Laminar Lip and towel/duct tape seemed to work satisfactorily. No buffeting and the APPARENT wind blast was reduced (subjectively) by about 30% or so. Very unscientific and subjective and I'm sure the towel thing did a lot to disturb the airflow....but it worked for me when compared to just the stock screen alone or the stock screen with the "untowelled" Lip on it.
Now if I was 5' 9" or so (instead of 6') it would have worked even better.

[ZenMan]

Wrong hole, Rick.  

[H2RICK]

Yep, Zenman, I've heard that about twice in my lifetime. I blamed it on the booze.....

[ZenMan]

All joking aside, the hole we're talking about is the one down at the bottom of the screen, above the headlight. Not the space between the windscreen and the spoiler, where you have your towel taped up.  

I agree, probably the booze...  

[skyrider]

Well, it's been awhile since this thread has been revisited.  It's Labor Day weekend and the girls' are sick so we're not taking the dog to the river for swim lessons.  So, what to do to fill my boredom?!  Hey, is that a ball of yarn?  Why yes it is!

Taped 2" long pieces: a). front of screen, centered, right at hole.  b).  front of screen, centered, half way up screen.  c).  two approx. 3" either side of center right at the top edge of screen.  d). inside of screen, centered, half way up.  Also, taped about a 3' piece coming off the top edge of screen, centered.

By the time I reached 20 mph, all of the strings were flowing smoothly and did not change...only went up to 60.  The long string "rode" nearly horizontal (canted up slightly) at a position that was about 1" higher than the top edge of the screen, therefore hitting me low chest/upper abs.  I then placed a wash cloth into the hole.  From zero to 60 all of the strings were flopping around aimlessly except for the one in item "a" above.   At some point I actually had to grab the long string to pull it up as it was laying dead down towards the forks.  It then stayed up, but swayed from left to right with a lot of burbling in the length of the string.

So there you have it, my Labor Day weekend.

[roberto]

I'm assuming that this test was done on the stock windscreen?? The test you have done is also done on aircraft wings and sails on sailboats. Sailors refer to them as tell tails, and use them to trim their sails. Yarn works quite well but old recording tape from a cassette player is even better. Any curved shape with air driven over it fast enough will produce lift and when the tell tails are all streaming back thats whats happening however when the tell tails no longer stream back then the wing or whatever curved shape you are testing is stalled. When a wing stalls the air is turbulent, detaching itself from the surface, hence the buffeting. The 3 foot yarn that you used in the centre is a bit long, you can get the same or better result with a yarn about 6" long as it will give you a truer angle. Your a curious person Skyrider, I'll bet you took clocks apart when you were a kid..

[skyrider]

I'm assuming that this test was done on the stock windscreen??

 Your a curious person Skyrider, I'll bet you took clocks apart when you were a kid..

Yes, the stock screen.  And, yes, I took all kinds of stuff apart as a kid...usually never worked again either.  Thankfully I have two girls and they're not interested in mechanical stuff.

Good idea with recording tape.  I only thought of yarn because one of the types of helicopter I used to fly used yarn as a trim device...quite effective.

Sky

[roberto]

Interesting, I'm a pilot myself. The only time I used tell tails was sailing but I'll bet you used the yarn on the helicopter for yaw? I once test flew a friends ultralight which I referred to as a lawn chair with wings and the plane came with a yarn on the front to check the yaw, no more needle ball, just yarn! Of course he also had a little tube with a wire down the middle and a shirt button on the wire, a hole in the bottom blew the button up and that was the airspeed which worked fine in level flight but when you turned steep the centrifugal force pushed the button down, cool. Anyways interesting to read your report...

[PhilS]

Pilots - that makes three of us, at least. I see yarn on experimental helicopters all the time still - go figure. Isn't that what the skid ball is for?

But on to more important things Roberto.....did you ever equip your bike with the Givi gear?

Phil  

[skyrider]

But on to more important things
Phil  

More important than flying?!  Get out!

[roberto]

I have purchased the Givi windscreen but haven't done anything on the bags yet, still soaking up the info. Put some grip puppies on yesterday and sometime in the next day or two I'm going to install the new frame sliders. I'm going to put a new can, probably a Yoshi on but will wait for winter. By the way does anyone know the proper torque for the engine covers as I have to replace a few bolts when I install the sliders??
Yup I could talk flying forever, over 9000 hours and loving every moment....

[PhilS]

But on to more important things
Phil  

More important than flying?!  Get out!

OK - you're right. And I get to do it for a living - WOOHOO!!

What I should have said was "Now on to less expensive things"