Chin Spoiler

[honk4sarah]

Not sure I like the looks of the chin spoiler - does it have a function?

[fullmonte]

If you don't like it, you can give it to me. Or, you could paint it yellow, turn it sideways, and wear it to Green Bay Packers games. :rolleyes:

[jimbo77]

The chin spoiler is purely cosmetic in my opinion, and now probably a fashion statement for a lot of Packer fans..... :lol: A lot more durable than foam cheese, and more aerodynamic......

[fugaziiv]

i think it does give the bike a 'thicker' look
but then again, i like that
once again, to each their own

[NoNoRicky]

The idea behind the chin spoiler is to manage aerodynamics at speed. From what I remeber from all of the early/mid 80's articles I read there is supposedly lots of turbulence coming from the front wheel while cutting thru the air. This turblence passes under the bike and is transfered to the rear wheel which makes it worse and could possibly make the bike unstable and wobble at speed. The wedge literaly cuts this turbulence in half and forces it to either side of the bike and also creates a down force makeing your bike stable, keeping you safe as you approach mach speed.

Supposedly......... <_<

[Flange]

With due respect NoNoRicky, as well as the very valid aerodynamic benefits which you so succinctly list, the true design goal behind the chin fairing is to neatly scoop up the higher piles of cow shit off the road and distribute it evenly over your boots & lower legs, as well as around the front of the motor and most importantly over the pipe so as to bake it and maximise the odour.

Proof of this is contained in the fact that they are also known as Turd Scoops...

Scientifically
Flange

[NoNoRicky]

We use them to remove road kill from our roads here in Texas. Road kill (http://www.road-kill-cafe.com/index.html) makes a great souveigner and one hell of a tasty treat.

[jimbo77]

also known as "Cow catchers".....

Ricky,
The information sounds believable enough, but I think that theory is geared more to the improved aerodynamics of lower fairings and belly pans. The size and dimensions, and height of the chin spoiler doesn't seem sufficient to accomplish those results. The main turbulence from the front wheel, looking at vector graphics, will be placed from just below the axle height and up. This puts the disrupted laminar flow, as it passes rearward, just above the chin spoiler, right into the oil cooler, front cylinder, and the radiator. The airflow actually hitting the chin spoiler is reduced even more due to the uplifted flow of air as it "rolls" off the rear of the spinning front tire. There is some laminar flow that is "sucked" back in behind the front tire resulting from the tire pushing air out of its way as it travels forward, creating a vaccuum effect to some extent, causing the air flow to "suck" back in behind of the tire/wheel. All of this can and does create some turbulence that will travel under the bike toward the back wheel, but I'm not sure if our bikes will actually achieve the speeds necessary for this to upset the stability, though it is possible. That is the main reason why the lower fairings and belly pans on the "wrist rockets" and actual race bikes do flare outward just short of the rear tire, and the lower fairing wraps the front wheel as much as it does...

Thats about the extent of my knowledge of physics, time for the real scientists to step forward... :(

[Geoff T]

And i was thinking it was just a piece of plastic!!!!!
how wrong i was :rolleyes:

Geoff

[ReiL01]

:beer:

Anyone know where you can purchase a chin spoiler (preferably factory) for the naked sv ?

[tojoh]

I feel all the more better; in general, and as a person to have learned all of these facts.
Keep up the good work.

P.S. There must have been some sub-conscious thought process that went into choosing the Bronze over the other colours. With my new found knowledge I now realise it was because the Bronze will allow most roadkill, bugs gutzes, and cow dung to camoflage nicely into the bike!!!
Cheers
Tony :niceone:

[zman]

Originally posted by NoNoRicky@6th June 2003, 10:21 AM<br /><br /> The idea behind the chin spoiler is to manage aerodynamics at speed. From what I remeber from all of the early/mid 80's articles I read there is supposedly lots of turbulence coming from the front wheel while cutting thru the air. This turblence passes under the bike and is transfered to the rear wheel which makes it worse and could possibly make the bike unstable and wobble at speed. The wedge literaly cuts this turbulence in half and forces it to either side of the bike and also creates a down force makeing your bike stable, keeping you safe as you approach mach speed.

Supposedly......... <_<
Then I wonder why it is not on the 650 or the naked 1000?

They must go through a different kind of air, that low friction, low turbulence kind.

:huh: :niceone:

[NoNoRicky]

Zman.......I would think that maybe the Sv650 doesn't have the potential for top end that the SV1000 does? Or that maybe you buy a naked bike because you don't want plastic. As for information to substantiate my post...it's prolly out there somewhere. All I know is that some of the old school sport bikes had them in the early and mid 80's. I had an 86 CB700Sc Nighthawk S with 1. All of the old VF interceptors had them. But you guys are probably right about this 1. With frame and suspension technology I'm sure you would be hard pressed to get a wobble out of an SV. I just gave my 2 cents and it was based on old school tech.

All I can say is, do we really want to give hard plastic wedges to the cheese heads out there? We might as well give Al-Qaeda work visas.

Another point...the downforce my wedge generated wasn't enough to keep me from crashing. Could be defective. *shrug* :blink:

[jimbo77]

NoNoRicky,

Ah, a point very well made.....I thinks the chin spoilers in the hands of Cheeseheads would force George W. Bush to pair them with other countrys in the "Axis of Evil" :lol:

Edit: Hope no one from France gets offended, just my two cents....

[zman]

NoNoRicky,

:oops: My post was mostly in jest.

I think it is mostly a "style" thing.

I don't think the difference in top speed between a 650 and a 1000 is great enough to warrent a different aero package. If it is going to benefit one, i would think it would benefit the other.

I agree, naked buyers, err... buyers that buy naked bikes, don't want the plastic, even if it is proven to help.

My first street bike, '86 (if memory serves) EX500 had an optional chin available. Looked good but i don't know if it "did" anything.

[NoNoRicky]

Yah, its kinda like world class swimmers shaving off all of their body hair to lower their lap times by 1/1000th of a sec. I would imagine there would be no real benefit below the ton and a half mark (150mph).

How about them Packers? :shock:

[fugaziiv]

the lack of chinnie on the 650 is because of a lack of top end power, and the needed to differentiate the two somehow other than the cans, i guess...

[NoNoRicky]

Exactly! Otherwise we'd have to flip them over to see what sex they are.