Discussion
I do flying lessons at Biggin Hill, which has b*stard speed humps all the way round the airfield. They "look" too big to drive over without something scraping ... can I just ask: what's the worst that could happen if it bottom's out? eg. is it chassis lengths that'll ground first and that may be able to take a slight scrape, or will it be more delicate gear? Of course, if it scrapes, I won't go again in the Cerbie, but just wanted to weigh up the risks of a scrape first time round?
The 1st thing that will ground will be the chin spoiler (£12 for a new one if you really f**k it up), the next thing will be the plate that protects the CAT's, but I'd be amazed if you did any damage apart from scraping the bolts....
What are the speed humps made of ? Brick - flat topped ones, tarmac humps, rubber triangles..... ?
What are the speed humps made of ? Brick - flat topped ones, tarmac humps, rubber triangles..... ?
Forget that spoiler as soon as it drops off - doesn't seem to make any difference.
As Olly said, Cerbera is miles better than the Griff/Chimaera in that the first things to touch down are those bolts. My car scraped the hump outside my girlfriends house every time with a horrendous noise, but hardly any damage to the bolts, and never any problems getting them off.
danny
As Olly said, Cerbera is miles better than the Griff/Chimaera in that the first things to touch down are those bolts. My car scraped the hump outside my girlfriends house every time with a horrendous noise, but hardly any damage to the bolts, and never any problems getting them off.
danny
dannylt said: Forget that spoiler as soon as it drops off - doesn't seem to make any difference.
As Olly said, Cerbera is miles better than the Griff/Chimaera in that the first things to touch down are those bolts. My car scraped the hump outside my girlfriends house every time with a horrendous noise, but hardly any damage to the bolts, and never any problems getting them off.
danny
The chin spoiler looks insignificant, but is more important than you might think. Ground effect in car terminology (as opposed to aerospace), is downforce created by a low pressure area between the underbody and the ground.
Bernoulli's theorem states that pressure is least where velocity is greatest and vice versa. If we apply this to the chin spoiler, it accelerates the airflow beneath the car creating low pressure, and thus DOWNFORCE.
Without the chin spoiler the car is less stable at high speeds, and front end grip is reduced. It was fitted for good reason and should be replaced if found to be missing.
Hope this is of some help.
>> Edited by stickshaker4185 on Tuesday 15th April 19:21
Bernoulli's theorem states that pressure is least where velocity is greatest and vice versa. If we apply this to the chin spoiler, it accelerates the airflow beneath the car creating low pressure, and thus DOWNFORCE.
Without the chin spoiler the car is less stable at high speeds, and front end grip is reduced. It was fitted for good reason and should be replaced if found to be missing.
Hope this is of some help.
>> Edited by stickshaker4185 on Tuesday 15th April 19:21
Have to say I agree with Danny, the chin 'spoiler' is unlikely to make any difference.
Whilst you are correct about the bernoulli principle, the length of the effective venturi tube is only a few cms. Other things to consider are that since the car does not have a flat underside then there will be quite a thick boundary layer under the car, limiting the flow and thus destroying the venturi effect.
The main problem for road cars is not front end lift but rear lift due to flow separation at the rear of the car (hence people fit those comedy rear spoilers).
In short don't worry about the spoiler (although mine is still there and if it fell off I'd have it replaced
)
Whilst you are correct about the bernoulli principle, the length of the effective venturi tube is only a few cms. Other things to consider are that since the car does not have a flat underside then there will be quite a thick boundary layer under the car, limiting the flow and thus destroying the venturi effect.
The main problem for road cars is not front end lift but rear lift due to flow separation at the rear of the car (hence people fit those comedy rear spoilers).
In short don't worry about the spoiler (although mine is still there and if it fell off I'd have it replaced
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