PUB AMMO

Author
Discussion

Zwoelf

25,867 posts

207 months

Thursday 21st July 2011
quotequote all
doogz said:
eybic said:
tucks said:
calibras were often known as the most areoydynaic car ever made(although in past years they have been beaten)

this only applied to the 8v version, the rest of the range were a much-of-a muchness in drag terms.
Surely it doesn't matter what engine is under the bonnet, the body is still the same shape so should be as aerodynamic???????
A quick google found this:

Aerodynamic drag coefficients
2.0i 8v : CD 0.26
2.0i 16v/2.0i 16v 4x4/V6/Turbo 4x4 : CD 0.29
That's not *that* great is it though? I've a dirty great housebrick on wheels in the shape of an '80s Seven Series that manages 0.31. I'd have expected car deisgn to have come a lot further in that respect since the advent of CAD and wind-tunnel testing everything in the name of fuel-efficiency etc.

eybic

9,212 posts

175 months

Thursday 21st July 2011
quotequote all
I bet you'de be shocked at "today's" cars, there is onyl so far they can go and keep withint their design limitations. For example according to: http://en.wikipedia.org/wiki/Automobile_drag_coeff...

a modern F1 car goes from 0.7 to 1.1 dependant on settings

  • eta beaten to it smile **

Mr2Mike

20,143 posts

256 months

Thursday 21st July 2011
quotequote all
eybic said:
I bet you'de be shocked at "today's" cars, there is onyl so far they can go and keep withint their design limitations. For example according to: http://en.wikipedia.org/wiki/Automobile_drag_coeff...

a modern F1 car goes from 0.7 to 1.1 dependant on settings

  • eta beaten to it smile **
And F1 car is an open wheel design though, about the worst possible starting point for aerodynamics, and certainly not any kind of benchmark for a production road car.

R11ysf

1,936 posts

183 months

Thursday 21st July 2011
quotequote all
[quote=attym3

Every Veyron cost VW well over £1million to develop, all sold at a massive loss to the company.


[/quote]

You've been listening to Clarkson too much. The Veyron project is in profit according to Bugatti's boss http://2010bugatti.blogspot.com/2009/07/veyron-pro...

Zwoelf

25,867 posts

207 months

Thursday 21st July 2011
quotequote all
Mr2Mike said:
eybic said:
I bet you'de be shocked at "today's" cars, there is onyl so far they can go and keep withint their design limitations. For example according to: http://en.wikipedia.org/wiki/Automobile_drag_coeff...

a modern F1 car goes from 0.7 to 1.1 dependant on settings

  • eta beaten to it smile **
And F1 car is an open wheel design though, about the worst possible starting point for aerodynamics, and certainly not any kind of benchmark for a production road car.
But it aids braking hugely doesn't it? That and if all the air is passing smoothly by, there's no way to produce downforce? I'd have assumed high aerodynamic drag was in some way a price to pay for the downforce effect.

Pub ammo bit" A McLaren F1 gets from 100-200 quicker than an F1 car (albeit a contemporary one, not sure how that stands up today) and is far quicker once above 150. But less stable.

Interesting link BTW, just found out the current Seven is no more slippery than a 20 year old one, which surprises me a lot. And the 8v Calibra is the same as a E90 Three Series (presumably the 320ED as others are up to 0.30)

Edited by Zwoelf on Thursday 21st July 11:46

Sushi

858 posts

201 months

Thursday 21st July 2011
quotequote all
Liquid Knight said:
http://www.ebay.co.uk/itm/MURDER-SHE-WROTE-COMPLET...

After fourteen seasons Jesica Felcher was never arrested as a suspect. silly
she also released a workout dvd in her spare time, http://www.amazon.com/Angela-Lansburys-Positive-Mo...

crafty bh

Mr2Mike

20,143 posts

256 months

Thursday 21st July 2011
quotequote all
Zwoelf said:
But it aids braking hugely doesn't it? That and if all the air is passing smoothly by, there's no way to produce downforce? I'd have assumed high aerodynamic drag was in some way a price to pay for the downforce effect.
It probably helps with brake cooling I suppose. Some drag will be from the wings producing downforce, that is an inevitable trade off and why the Wiki article shows a range of drag figures. However, you could significantly reduce overall drag by enclosing the wheels like LMP cars do.

Shuvi Tupya

24,460 posts

248 months

Thursday 21st July 2011
quotequote all
If you clench your fist, your forearm (up to the elbow) and fist are the same size as your willy.

No? Just me then.



Zwoelf

25,867 posts

207 months

Thursday 21st July 2011
quotequote all
Shuvi Tupya said:
If you clench your fist, your forearm (up to the elbow) and fist are the same size as your willy.

No? Just me then.
Thalidomide was so cruel.

Shuvi Tupya

24,460 posts

248 months

Thursday 21st July 2011
quotequote all
hehe


eybic

9,212 posts

175 months

Thursday 21st July 2011
quotequote all
On the fist vibe.

Your heart is approximately the same size as your fist clenched.

Nick3point2

3,917 posts

181 months

Thursday 21st July 2011
quotequote all
Zwoelf said:
Mr2Mike said:
eybic said:
I bet you'de be shocked at "today's" cars, there is onyl so far they can go and keep withint their design limitations. For example according to: http://en.wikipedia.org/wiki/Automobile_drag_coeff...

a modern F1 car goes from 0.7 to 1.1 dependant on settings

  • eta beaten to it smile **
And F1 car is an open wheel design though, about the worst possible starting point for aerodynamics, and certainly not any kind of benchmark for a production road car.
But it aids braking hugely doesn't it? That and if all the air is passing smoothly by, there's no way to produce downforce? I'd have assumed high aerodynamic drag was in some way a price to pay for the downforce effect.
Yes, having front and rear wings, ducting for cooling, an airbox, open wheels etc etc all cause drag. But thats not to say they are necessary....

The other thing is that F1 cars have very very very small frontal area, so despite having very high Cd, they have much less than expected drag at a given speed.

Remember that Cd only tells part of the story; a greyhound bus has a Cd of arond 0.3, but huge frontal area.




As for the Veyron thing, yes, each one was sold at huge loss, but VW have always been adament that the project was an engineering exercise and not one to make money.

ZOLLAR

19,908 posts

174 months

Thursday 21st July 2011
quotequote all
Zwoelf said:
Shuvi Tupya said:
If you clench your fist, your forearm (up to the elbow) and fist are the same size as your willy.

No? Just me then.
Thalidomide was so cruel.
laugh very witty biggrin

Paul_M3

2,371 posts

186 months

Thursday 21st July 2011
quotequote all
eybic said:
tucks said:
calibras were often known as the most areoydynaic car ever made(although in past years they have been beaten)

this only applied to the 8v version, the rest of the range were a much-of-a muchness in drag terms.
Surely it doesn't matter what engine is under the bonnet, the body is still the same shape so should be as aerodynamic???????
The early 8v didn't have alloys, it had thinner steel wheels with virtually flat hubcaps on.

Shows what a difference to aerodynamics just a set of wheels can make.

CampDavid

9,145 posts

199 months

Thursday 21st July 2011
quotequote all
at 8 feet long the cambelt on the Porsche 928 S4/GTS is the longest of any production car. (this is an old fact, though I can't think of anything to over take it)

tucks

558 posts

165 months

Thursday 21st July 2011
quotequote all
my fact created pub style banter.go me.smile

jesta1865

3,448 posts

210 months

Thursday 21st July 2011
quotequote all
half a byte is a nibble (4bits)

as for aerodynamics on cars i would have thought the next big breakthrough will come in paint design, a paint that lowers the friction or creates a void round itself similar to the 'shark skin' swimming costumes ?

Zwoelf

25,867 posts

207 months

Thursday 21st July 2011
quotequote all
CampDavid said:
at 8 feet long the cambelt on the Porsche 928 S4/GTS is the longest of any production car. (this is an old fact, though I can't think of anything to over take it)
Probably as most bigger V engines run chains do they not? Only other belted V8s I can immediately think of are Lexus and Ferrari/Maseratis.

Mr Gearchange

5,892 posts

207 months

Thursday 21st July 2011
quotequote all
If two flies were allowed to breed without predation within a year there would be a mass of insects the size of the planet earth.

Zwoelf

25,867 posts

207 months

Thursday 21st July 2011
quotequote all
jesta1865 said:
as for aerodynamics on cars i would have thought the next big breakthrough will come in paint design, a paint that lowers the friction or creates a void round itself similar to the 'shark skin' swimming costumes ?
Usually done on race cars as it is on aircraft - via polish - is it not?