Tmax any Good?

[MrGrumpy]

I like the buffeting, it adds extra thrill, but then I am weird like that

Well, if you have a mk3 Tmax with the standard screen, you sure have the right bike!!!!! There's buffeting and there's turbulence that shakes your head like a demented heavy metal fan!

( I've always wanted to use that smilie, and now I've got the chance!!!)

[irev]

I like the buffeting......

I like knowing how it works, lets you fix it, improve it, make it - thought it might help somebody else do the same
Plus I'd look dumb standing in the wind tunnel and get no more contracts.
I'll keep my gob shut next time

Sorry Irev, you're wrong about AoA > stall angle (cant be, its in negative alpha and it ain't a wing)
Someone less polite than me might say:

Tuft yours, and prepare to learn something...

Actually the stall angle does happen, as the consequence of
1: the angle on the front face versus the angle on the back face. A very poor aerofoil, but an attempt at an aerofoil nonetheless. Just like a frisbee.
2: Capturing spanwise flow that would otherwise roll off the sides of the screen is also a cause of `stall`. Stall fences would help.

I've mentioned this before, all you need to do is stick a couple of straws to the outside of the screen, inline with the general pattern of flow. Experiment by moving them in and out with reference to the screen edge, and you pretty quickly find a substantial improvement.

Alternative `B` is to manage the ratio and thruflow of the low pressure zone - it's a very poor choice to place a gap at the foot of the screen - there's no flow there to propagate. On the sigfiddy I had the Clearview screen with the GoldWing stylee adjustable vent - not only aided in the low pressure zone and retained flow attachment up the inside of the screen, which is the bit you really want to control, but could also be opened wide in Summer to direct a stream of air at the trouser department. Electric adjustment? Arse!

And it's not about the screen in isolation, but that's a while story. For another day.

[DougL]

I put on the GIVI AirFlo and the difference was ASTOUNDING! Buffeting gone, and both top speed and mileage increased due to the more aerodynamic frontal area...

You must be a different height/build to me because I found the GIVI Airflow screen for the Mk3 to be less than useless. I also sold the Laminar Lip as that was useless too. What did work for me was using the Airflow bit of the GIVI screen along with its brackets, attaching them to the original screen. Yes I had to drill it (measure ten times, or else you'll make a mess), but it was extremely effective. I did exactly the same on the Beverley and it worked well on that too; the original screen was awful on its own.. The airflow bit and brackets cost me about £50 with a bit of discount, therefore cheaper than a Laminar Lip.

[MrGrumpy]

I put on the GIVI AirFlo and the difference was ASTOUNDING! Buffeting gone, and both top speed and mileage increased due to the more aerodynamic frontal area...

You must be a different height/build to me because I found the GIVI Airflow screen for the Mk3 to be less than useless. I also sold the Laminar Lip as that was useless too.

Weird! You must be a very peculiar height! Are you a giraffe or something? As I've said the Lip worked wonderfully for me on the mk3 (I'm around 5'9") - and the appearance of the lip (in terms of height above the original screen ) on my Tmax looks very similar to your picture.

[bikerdezzie]

I am 5ft 11 1/2, never had any issues with my mk3 tmax screen at all, I still have it as new under my bed lol but I liked the sporty black screen I had on it and never took it off and had no issues with that either, sometimes its the lid ya wear aswell, I always had shoei lids and had no buffeting at all, then again a tried a tmax mk1 in yellow with standard screen and my head almost blew off at 50 it was awful!

[SkuTorr]

I put on the GIVI AirFlo and the difference was ASTOUNDING! Buffeting gone, and both top speed and mileage increased due to the more aerodynamic frontal area...

You must be a different height/build to me because I found the GIVI Airflow screen for the Mk3 to be less than useless. I also sold the Laminar Lip as that was useless too. What did work for me was using the Airflow bit of the GIVI screen along with its brackets, attaching them to the original screen. Yes I had to drill it (measure ten times, or else you'll make a mess), but it was extremely effective. I did exactly the same on the Beverley and it worked well on that too; the original screen was awful on its own.. The airflow bit and brackets cost me about £50 with a bit of discount, therefore cheaper than a Laminar Lip.

NICE JOB on adapting it to the stock screen! Saw another guy do it also on a Spanish forum, and he made a PDF of the process.
he installed his a bit HIGHER on the stock screen: I like YOURS BETTER!

[Bluebottle]

Skip this if you are not Irev:

I said you're alpha value is massively wrong, not that your stall angle did or didn't "happen"

We would never use "stall fence", that is a specific component doing a specific job on a particular type of wing. Only aircraft enthusiasts use it out of context.

Most of the individual bits of what you are saying are absolutely bang on.
But you've also put some guesses and a biased assumption in there to fill in the gaps.

I don't think you are going to consider what I say and nobody is interested in the tech stuff so I'll save my breath and get back to doing it

[chippie]

I really wish I knew was you was taking about.

[Bluebottle]

You've got a practical mind Frank so I reckon if I wrote one post of plain english you'd have everything Irev said, its just basic aviation and a bit of enclosed bike thrown in.
If anybody did actually want the tech in understandable english and without the bullying I can do it another thread somewhere.

As it happens I was on the design team for at least 2 of the designs Irev mentioned a while ago but I don't think he's realised it yet

[michaelphillips]

You've got a practical mind Frank so I reckon if I wrote one post of plain english you'd have everything Irev said, its just basic aviation and a bit of enclosed bike thrown in.
If anybody did actually want the tech in understandable english and without the bullying I can do it another thread somewhere.

As it happens I was on the design team for at least 2 of the designs Irev mentioned a while ago but I don't think he's realised it yet

so forgive my ignorance, if you have a gap at the front of screen to body ( taking it a half circle at bottom) if you were to attach a rubber seal simlilar to this http://www.ebay.co.uk/itm/4mm-ID-Silico ... 1e6b0b5bbc" onclick="window.open(this.href);return false; would that aid it turbulance removal